HomeMy WebLinkAboutAPA1930dALASKA DEPARTMENT OF FISH AND GAME
SUSITNA HYDRO AQUATIC STUDIES
REPORT NO .. ::; Part I, Chapter 1
A TIC H T AND iNSTR M FLOW
INVE TIONS (MA 1983)
ALASKA DEPARTMENT OF FISH AND GAME
SUSITNA HYDRO AQUA TIC STUDIES
REPORT NO .. 3 Part I, Chapter 1
AQUATIC HABITAT AND iNSTREAM FLOW
INVESTIGATIONS (MAY-OCTO 1983)
Edited by:
Christopher C .. Estes
and
for:
AUTHORITY
1
$ i vid into i' ters
1 St i g ion t
ver
2 ann y i ig ons n
ver
er "':!' tinuous t er ure in ig an ._.
itna. River basin
ter 4 er ity i ig ions the it
R ver basin.
5 Dissolved gas concentration in ig ions Q
the Susitna River basin ..
resu1
i ca 1 ( o g.
in a si
1
II 3
or· 1 on wa
1 i c ( e ., g ., ma i n s
er
1 or sl
shelf of a si sl
or 1
si ls ..
i three conditioms of i
d
or si
mai
si 1 or side slough (see also initial, i
con 11ing breaching discharges).
1
i
0
i , a
Controliing Breaching Discharge-The breaching condition in whi
mainstem discharges at Gold Creek are equal to or greater than
mainstem discharge required to directly govern the hydraulic
Cross
characteristics within a side slough or side channel. is
condition can be denoted as equa 11 i ng the segment of flow
rating curve beginning with the point of inflection and beyond ..
envi
dis so
ion Profile -A profile describing the cross
try of a channel~
i u sly
.. g.. ir or
ional
ion ( r 1~ 2 a 5).
va i
vo1 i a
t.
' s sl
ly
sl
c 1
1 t
on a a i
tion -s on a si which es 1 is
monitoring stage, flow and/or di
dient -Rate
dis nee ..
change in vertical elevation per unit horizon 1
The upstream uence or int gin a lotic wa
I ection Poi i on a curve at ich the line
i sl
I tia1 i mains discha at 1
i
) or
i
h
i
i
11y
mul ple
i
a
ve
i
si
i
f
it ions
wa
or si
ins
th,ose portions
throughout the
are i nc 1 u ded i n
ns
is
tributary inflow appear to
i
i
i
tors to the overall characteristics of mains
1
1 i
i t ..
instem habitat is typically characte:rized by h1gh wa r
velocities and we11 armored streambedse Substrates aenerally
consist of boulder· and cobble size materials with interstitial
spaces filled with a grout-like mixture of small gravels a
glacial sands. Suspended sediment concentrations and turbidity are
high during summer du~ to the influence of g 1 ac i a 1 me 1 t-wa
Discharges recede in early fall and the mainstem clears appreci
in October. An ice cover forms on the river in 1a November or
December ..
Mean Oa i 1y Oi rae -·' mean discha 24 r i
a i s ti 1 di in is t.
on s on r 1 i
uence of one or more
wa
i b i
ral Habi ti~ itats peripheral
i River itat (e .. g.. side nnel, si
s 1 , tr·ibutary mouth and/or tribu habi
mains
s1
1 -A portion of a water course that is relatively a
s1ow-moving in comparison to the rest of the wa coursee
pl
Project Datum - A series of elevations ti~~ to sea level that are us
by project personnel to tie relative data bases together$
Rating Curve - A curve that is constructed from data rep
dependent va ri ab 1 es (e.g. stage, flow or d i scha
i r.g
da )
describes the relationship between the two variables at a si
Riffle a .. A portion of a water course that is relatively s 11ow a
t-running in comparison to the rest of wa course.,
1
-5-1
nnel i t is of i i r
1 in 1 ow
1 s, or in ned wa courses
a11y is1 along i
mai river~ channe 1 s ons re
ica11y lower mean monthly water su evations
mainstem Susitna River observed during June~ St~
habitats are characterized by 11ower
oci es smaller streambed materials than
i mainstem river.
Si Slough Habitat -is located in overflow channels between
the edge of the fl oodp 1 a in and the rna ins tern and side channe 1 s of
the Susitna River. rt is usually separated from the mains:err.
and/or side channels by well vegetated bars. An exposed alluvial
berm often separates the head of the slough from mainstem discha
or side channel flows. The controlling streambed/bank elevations
at the upstream end of the side sloughs are slightly less than the
water surface e 1 evat ions of the mean month 1 y discharges of the
mainstem Susitna River observed for June, July, and August. At
i ntermedi a and 1 0~1-di scha rge periods, the s i s 1 oughs
clear wa from small tributaries and/or upwelling ground\-JatP.r.
These clear water inflows are essential contri tors to
exis is i wa su elevation of
i 11 y c:ause:s a ex
sl i h this su n i
ser
exists, s1 on 1 i 11 v
small s 1
of mai
eleva ons
is su s 1
in s i
11y a function of air , solar
of local runoffo
-A ice used to ins 1y moni a si
-A measure of water depth which can
surface elevation when surveyed to a benchma
wa
at a si It
be converted to true water surface elevation if it is ti in
project datum.
Thalweg Profile -A longitudinal profile that describes the st
elevation of the deepest portion or middle of mainstem, tributary,
slough or other riverine habitats.
Tributary Habitat ... consists of the full complement of hydr·aulic and
morphologic conditior.s t occur in taries. ir
seasonal flow') sediment, and thermal reg·imes r~~f1
in ration of the hydrology, geology? and climate the t
inage.. The physical attri tes of tri i are not
on mains i ons.,
1
i
ser
i t -ex
i
mains
ition wa
i rr.rgani c
u
si
rmost
ver
of
Susitna River or sl
qua 1 i at a s i
and/or c su
Habi t -differs from side slough i
f the slough does no interconnect
p1
wa cla
in
th
1
the
su
i
is
a1s
of mainstem Susitna River or i side channeis even at
high mainstem discharges .. These· sloughs are characterized ,..
presence of beaver dams and an accumulation of silt covering t
subst.r·ate resulting from the absence of rna~nstem scourAing
d ·: sc ha r·ges.
Water Surfac~ Elevation -The elevation of the water surface.
WSEL -See water surface elevation.
~
Report Noe 3, Chapter 1
m Quane, t rrow,
Al Department Fish and Game
itna Hydro Aquatic Studies
2207 Spenard
Anchorage, Alaska 99503
row
)
I
1.,2 .. 2-
i
Side Channel, Siae Slough and
Upland Slough Habitats~
~1ETHODS ................ e
..
2.1 Site Selection.
2.1 .. 1
2.1 .. 2 Side Channel, Side Slough and
Upland Slough Habitats ........ .
2.1.3 Tributary Habitats.
2.2
Stage .................. "' .................. ., ................................. ..
2 .. 2 .. 2
Analytical Approach ........ .,
Mai Habitats.
\ J
I
)
)
.. 1 i
3 .. 2 Si
2 Si
3.2. 1 .. 2 General 1
3.,2.1 .. 3 Stage/Discharge Rel
3.2.1 .. 4 i
di
3. 2.1$5 Backwater .................. •t ......... ., .............. ., <l> .. .. .. ..
3~2 .. 2 .. 3 Stage/Discharge Relationship ...................... ..
3.2.2.4 Mainstem Controlling i
Discharges ......................................... ~ .. ..
3.2.3 Lower Side Channel 11 {RM 134.6) .... e •.• .. 0". e 0 .. <HHH>
I
I
3 .. 2 .. 3.3 Stage/Discharge Relationship ...................... o D
3.2.3 .. 4 Mainstem Controlling and Breaching
't~ ~' ,# "-,Q! ~~hwa " "' .... c. .... "' .......... " .. " ..... ., ...... "' .......... ..
..J· 4;, ..J ~ u IIIIJ ...,' ~ ..... r · -· · -~ .......... -.. -.. ----...
3 .. 2.4 Upper Side Channel 11 (RM 136 .. 2) •••••••••• ~·····
3.2.4.2 General Resul
3.2.4.3 Stage/Discha
3.2.4.4
• f
II f
li
3 .. 2 .. 5
3 .. 2@5 1
3 .. 2 .. 5 .. 2
3 .. 2 .. 5 .. 3
.. 2)"' ........ .,
Re1
3 .. 2 .. 5 .. 4 Mainstem Controlli i
( 101e2)eO$G.@Ili"OOOI!lOII>$0 0
3 .. 3 .. 1 .. 3 Stage/Discharge Relati
3 .. 3 1 .. 4 Mainstem Controlling and Breachi
DischargeS., ... .,., •• ., .. .,.,o.,oeeoeooeoeooe@eoo
3 .. 3.2.3 Stage/Discharge Relationship ................... ..
3o3 .. 2 .. 4 Mainstem Controlling and Breaching
3 .. 3 .. 3 .. 2
J .. 3s3e3
3 .. 3"3 4
Discharges.... .. ........................... e ................ ..
Resu1
lli B i
I
61
b
b
b
b
b
(,q
~
b~
b~
t
3 .. 3 .. 3 .. 5
3 .. 3 .. 4 Si
3 .. 3.4 .. 2
3 .. 3.4 .. 3
3 .. 3 .. 4.4
3 .. 3.5.3 Stage/Discharge Relationship ••• ~ ............. ~
3 .. 3 .. 5.4 Mainstem Controlling and Breaching
D.. h 1 SCa.a rges 0 " II ... II .. Ill " " .. C!l ., 6 ... e e " <!) .. 0 .. G .. I> .. ., 1!1 Gl
3. 3 c 5" 5 Backwater 0 0 •• G" .... "' .. ., .. e. tt .. 0., 0 ....... " ....... .," ...... "
3 .. 3 .. 6.2 General Results ......................................... §.... 1 I
3 .. 3 .. 6 .. 3 Stage/Discharge Re1 onship .................... ..
3 .. .. .. 5
.. 3 .. 7 Si Sl
3 .. 3 .. .. 1
3 .. 3 .. 7 .. 2
::L,3 .. 7 .. 3 q
3 .. 3e7e4
3.3.8 Si Slough 21 (RM
.. 4 Mainstem Controlling
Oischarges ............................................ s .......... o
3
I
3.3.9 0
3 .. 3 .. 9 .. 3 Stage/Discharge Relationship..................... )11
3 .. 3 .. 9 .. 4 Mainstem Controlling and Breaching
Discharges ................................................ ..
3 .. 4 .. 1 Upland Slough 6A (RM 112.3) ............................ 0 .... ..
II
3 .. 5
3 .. 4 .. 2 .. 1 Si
3 .. 4 .. 2 .. 2
3.,4 .. 2~~3
3.4 .. 2.4
i
(
ion ......
i
3 .. 5.1 .. 1 Si Description......................... .... .. .. ..
3 .. 5 .. 1 .. 2 General Resul ........................ ., .............. ~ ..... ..
~ 3 .. 5 .. 1.3 Stage/Discharge Relati p ........................ ..
3 .. 5 .. 2 Lane C (RM 113.6)., .................................. 0 ............ ..
3 .. 5 .. 2.1 Site Description .......................................... ..
3 .. 5 .. 2.3 ·Stage/Discharge Rel onship ................... ..
3.5 .. 3 Fourth of July Creek (RM 131 .. 1) .............. 0 .. @ .... ~ ••
I
3.5.3.1 Site Description......................... 1
3.5.3.2 General Results......................... 1
3.5.3.3 Stage/Discharge Relationship............. 1
3.5.4 Waterfall Creek (RM 140.1) ............... ~······· 1
3.5.4.1 Site Description......................... I
3.5.4.2 General Resul
3.5.4.3 Stage/Oi
3.5.5 Unnamed Tri
3.5.5'12
3.5 .. 5.3
3o5o6 d (
I
3 5 .. 6 .. 1 Si i
3 .. 5 .. 6 .. 2
3 .. 5 .. 6 .. 3 ons
":.) 'i .. 7 an ..li .. 6)"" 0 "'"' .. "., .. " .... ·~ """ .. 0
3 .. 5 .. 7 .. 1 Si ri
3 .. 5 .. 7.,2
ip ..
Portage Creek (
Site Descri
3.5.8.,2
Stag~/Discharge Rel
DI
I
I
leO LITERATURE CITED •••••••••••••••• ~. o ••••• ., ••••• e ••••••••• o o. fli 4lJ
I
1
on in
i
mean daily di
ons at Susi Station,
on~ Gold Creek on
son of rna 1 nstem scha rge Go 1 d
(USGS 15292000) for 1981, 1982 1
d season (May-October) •...••••••••..••• *
of Mainstem II Side Channel ich is
on the east bank of the Susitna River
1 Stage versus flow rating curve for Mainstem II Si
Channel (NW Channel), staff gage 114.4S5~·············Q·
Stage versus flow rating curve for.Mainstem r; Side
Channel (NE Channel), staff gage 114o4S8 ••••••••••••••••
1 Side Channel flow versus mainstem discharge rating
curve for Mainstem II (NW Channel), staff ga,ge
114 • S5 • o o til o 1!1:1 o o o e • e e • e o G e o G o «t e • o a o • ®' o o o * o e o e o o e c e e e o o $ 0 e e
Side Channel ow versus mainstem discharge rating
curve for Mainstem II (NE Channel), staff
11 map of Side Channe·! 10, which is 1 on
bank of the Susi tna River river mile
12 Channel
1-
curve
I
3
1-
1-1
1-
1-
i
on
i
di
11,
Si Channel 11, i is 1
of the Susi ver
versus flow ng curve for
11, staff gage 136. $600~~eeooooooooeoee~o ·~·
1 flow versus mainstem
curve for de Channel
1 map of Side Channel 21, whi is 1
bank of the Susitna River at
on
le
1 Stage versus flow rating curve for Side Channel ~
staff gage 140.654 ••••••••• ~~·······0··············· ...
1 Stage versus flow rating curve for Side Channel 21,
staff gage 140.657 •••••••••••••••••••••••••••••••••••••
1-23 Side Channel flow versus mainstem discharge rating
curve for Side Channel 21 1, staff gage
140 o 6 $4 o • e o e o co e o e o o e e "' e o o o o o o "' o o o "' • e ., o • o "' o o e " "' e o "' o " e ., e e .,
1-24 Side Channel flow versus mainstem discharge
curve for Side Channel ;~1, staff
140 e 6 S 7 o .. o e o " e e e ., e co e o • • e e o e e e <111 o e " <1> e o & o o e e e e e ., " "' " 0 ., "' e e ., <II 0
Site map of Whiskers de Slough, which is 1
on the west bank the Susitna River at river
101.2 e " ,. e e ., '!'." e 111 " " o o e • o e • o o " • " e '" e e " " e ., " ,. e " e o <11 ., e ,. o ., ,. 11 ., <II ., • .,
1-26 versus flow rating curve for Wh~ ·~r~
Slough, 101.2S3 . ., .• o .... * .....
1-27 Slough 8, i is 1
Susi River
1 curve 8
I
6
1
1
1
1
1
Slough flow versus
Side Slough 21,
map
bank
eas
2."
Si
the
e '~> e $ "
curve
curve
9, whi is on
itna ver
ng curve Si
rge ng curve
.JSle•••~oooo •eeeo~
is 1
river mile
curve Si Sl
curve
Sl is on
i 1
"'"'" • • 0 "' • <!I !1\ 0 Q
..
I
1
1
1
1
1-51
cu i
21,
i
curve
is
142. OS6 .......................................... o................ .. .... ., ..
Slough ow
Si Sl
map
north bank
Slough , whi is 1
Susitna River
versus fl o~t rating curve Si S1
curve
gage 144 .. 356 ............................................................ .
flow versus mainstem di
Sl~ugh 22, staff gage 144 ..
curve
Site for Upland Slough 6A, which is 1 on
the bank of the Sus i tna River at river 1 e
1-54 Site map of Upland Slough 19, which is located on
the east bank of the Sus i tna River at river mi 1 e
1-55 Site map of Whiskers Creek, which is located on
Jl
I
west bank of the Susitna River at river mile 101 .. 4.......... I
1-56 Stage versus flow rating curve for Whiskers Creek,
Staff gage 101 .. 2T2 ..................................... ~................. I
1-57 Site map of Lane Creek, which is located on
east bank of the Susitna River at river mile
1
1
Stage versus flow rating curve for C ,
staff 114.6T7 ............ ~ ................................ ..
Si
on
of Fourth of July
bank of itna
is 1
river
131 .. 1 ... " .... "' ......................... 0 ......................... 1//J "' .................. " " ........ ..
curve
)
0
1
1
i i
ve
Portage ch is
of Susitna River
( ) versus
, continuous
ng curve
curve
mai
Tal il
stage/discha es
eld season •••••••• G.eeee••····Q
e1 on
the time of measu'II"Qifli'!On
1 ocati on within
1 water surface elevation
scharge at the time of measu
monitorin~r~ location within Si
-& 8 • a • o o e 11 e e • s o • e o <r~ e 10 o 0 • o • G e • e o o e e c s fD o -e = • a v w •
1 of surface elevation and correspondi
mainstem discharge at the time of measurement
stage monitoring location within Lower Si
Channel 11 at RM 134.6 •••••••••••••.••••••.••••••••..••.
1 Ranges of water surface elevation and corresponding
mainstem discharge at the: time, of measurement for
each stage monitoring location within Upper Side
Channel 11 at RM 136.2 •••.•••••••••.•••••••• $ •••••••••••
1-8 Ranges of water surface e·Jevation and corresponding
mainstem discharge at th~~ time of measurement for
each stage monitoring location within Side Channel
21 at RM 141.2 ..... @6$f>9C!I'I0&6G$<DOGG<ii<IIG0<1e80GCIOOOI!IQS00&$ ... 1!1 ......
1-9 Ranges of water surface elevation and corresponding
mainstem discharge at the time of measurement for
each stage monitoring location within Whiskers Side
S 1 ou g h RM 10 1 • 2 .. .. ........... tl> ......................................... o ...... ., .. ..
1-10 Ranges
mai
each
( 6{,
1-
1-
1-
1-
surface on
a.t of. mea
ng location within
137,. 8"' o 111 "' "' e o o o o 1> o e e e o o & " .. o <n e e e e $ e e 0 e e " 0 0 flt
surface elevation
discharge at the time of
stage monitoring location within
140 . 2 .!) 4 $ ~ 0 & e C 4l' G 4lt C> Iii & 0 $ 18 CO 8 G G S 0 0 G G 0 (9 0 C 0: $ CP 19
water surface elevation and co
mainstem discharge at the time of measurement
each stage monitoring location within Side Sl
21 at RM 14li!'811>., .................. $ ................. 1ii$Gile9t>G1i>611Goeeee ..
I 0 tJ
1-17 Range of water surface elevation and corresponding
mainstem discharge at the time of measurement for
each stage monitoring location within Side Slough
22 at RM 144.2.................................................. //
1-18 Ranges of water surface elevation and corresponding
mainstem discharge at the time of measurement 'for
each stage monitoring location within Upland Slough
6A RM 112 e 3 o <~> o 0 & "' .,. o e o s ., o e o e o"., o 11> o,. o " e "'., e ., o o e ., o e e o 0 e ., 0 e., e } /
1-19 Ranges of water surface elevation and correspondi
mai nstem di schargs the time of measurement
each stage monitoring location within Upland Sl
19 at RM 1401!00 ... $ ....... "' ............. <11 •• "' .... * ...... .,<1) • .,.,@.......... I
1-20 ) and
d ry
for 1983 .......... * ...... " 0 ............ * ......... ., .......... <> .. ., I
1-21
I
1 1
i ili
i
(
co11
ver basin since 1981.,
lection
main stem di s on
ns on of river
si channel, side slough,
i Although measurements
in the lower river (Cook Inl
the collection program has la
) ro
1
the Susitna River from Talkeetna upstream il
on
ine
su
ect related impacts are expected to be most severe in is
lts of these investigations (ADF&G 1982, 1983) have indi
c
range of mainstem discharges experienced during 1981 and 1 were
rel ve1y higher for 1981 and normal for 1982 as compared
historical 25 year mainstem discharge conditions ( gure 1-1) (
1978). It was found that f'1r the range of mainstem
8,000 to 30,000 cfs, the relationship between su
mai
various mai
and mainstem discha is r'el vely
locations between Talkeetna Devil
re1 ip
lie i si s 1 ou i
di
on in
---1981
~---1982
25
·--·~~= R
re
·-·-
\
\
s in
mains
si
s'l habitats during moderate to high mainstem
gations in side channel habitats show that lie
mainstem discharges are similar to those occurri in
itats, although lower mainstem discharges initiate these se in
side channel habitatso
Investigations in upland slough habitats have shown that raulic
characteristics in these habitats are less directly rel to main
discharges than ~hey are in side .~.;laugh or side 1 i
Upland slough habi were found to overtops Extensive r
areas were, , observ~~d to occur at
sl to high mains
i al i in seven es in
1 i 1
i
six
' L 1 c I an
1 ives
d season ( 1
1 on was s
on
ver., c ves
OWe
1 .. 2 .. 1
objectives of the 1983 open wa seas or•
conducted in the mains tern Susi tna River
i1 Canyon were to:
1) Collect sufficient water surface elevation
1
e1
i
ons
on
define
mai
occu
ve
ip
di
during
u ineers
ous lie simul
i
1
a
11
1
mai
mai
season ..
1
ion s
1
1
i
season
1
) i i1
) 1 and measu
s (upland si
i
enced 1 1 sea
) 1 su ons in
( and i
on
are i mai
) 1 measu in 1 i
sl si i
( i si
( sh s ' I
1) 1
ins
ons ..
ves the 1
i 1
curves
ng the 1983 open
moni
measu
i1
1
d season;
2) Collect measurements of stage and di
tributary and tributary mouth habitats to su~.., :--t
habitats in these habitat zones ..
il
i 1
i i
n se
1)
2)
1
dis
s
ons
mai
i
season to
on
ng
1
surface
are
on th
ons occurring
ons V11ere pl
ion over
ect engineers for use ib
L .. ,... .. , .• c··de mainstem water surface elevation data
ning the influence that mainstem di
hydrau1 i c characteristics of se 1 side channel,
slough, and mouth habitats,.
data coll in the mai in Tal
of si River ( gure 1 ) is
i the U.S .. G .. S .. Gold C
d i s 'ion was
on ose i
ions in i i ive
i
1 1
11
on
u
has on
1a
as
mon
in
si
il
) ~
·--,-----
1 ..
eS
.. 0
.. 2
.. 2
o9
04
"7
.. 4
112.3
1 .. 4
113 .. 0
Creek Mouth 113 .. 4
Mouth 113 .. 6
Creek Mouth 113 .. 7
nstem 2 Mouth 1 .. 4
instem 2 NW Head 1 .. 5
Mainstem 2 NE Head 115.9
shwheel Station 120 .. 6
Bank LRX 24 120.7
Bank at LRX 28 124 .. 4
Channel Slough SA Mouth 125e3
Bank LRX 29 126 .. 1
nstem Above Slough 8A NE Head 127.1
ght Bank at LRX 31 128 .. 7
ght Bank at LRX 32 129.7
Right Bank LRX 33 130.1
Right nk at LRX 34 130.5
Right Bank LRX 130 .. 8
Mainstem B/L Fourth of July C 131el
LRX 37 131 .. 8
Mai Side 10 Mouth 133e8
Left LRX 40 134 .. 3
Side Channel L ough 11 .3
Si Channel ough 11 135 .. 3
Sl 16B 138 .. 0
S1 .. 3
1 1
.. 3
.. 5
.. 9
.,8
1
i
1
(
~ --·---------------------
~$ fll'@'flflj JI Nit !i<IHilCS
MS i.,@fHi Cn@m M~H~f"
S 1.U l..llliUI Cns' Mlll~t~
WS low Ltt CneJIII
•U t.IU\ I
2)
s
2
le
ons
were moni ve si
) si
).. Si \~ere 1
neers biol i
ine on
i ni
several cs of si
i (i .. e .. , b i , bac a ow
surface elevation data
by ect bio1ogi in si channel
1
di
me
eva1ua ons
s1
on
s1
ons)"
was moni red thin the mouth portion, free-flowing po on,
rti on of each si In addition, discharge was moni
in the free-flowing portion each study s i
ined thin the
evaluate
flow"
rtion of study
curve ev
s di
si was u
b
u 1
di
si
portion of
rg~
was u
of
to
that main
on (
n
study si was
as a nction
thin
i
mains
)
si
on
i
i
si
1
.. 2
1 .. 3
113 .. 6
1 .,4
125 .. 3
128 .. 3
1 .. 8
1 11 .,0
.. 3
11 .. 2
137 .. 8
.. 7
1.40 .. 1
140.,6
141~8
144 .. 2
"1
di were mor1i
( 1
pl in areas di
i were on consul
p
curves ons fish ~~ b 0
2 .. 2 .. 1
were obtained 1 izi ei
' I ..
Stage data obtained using standard Leopold {0.
gages were determined to the nea one-hundredth of a
assigned elevation, which is
was
elevation (proj
1
for each gage
datum) .. This all
su
can
1
i
1
I
a 11 resu·l
in
(
1d
t
(
i
11 on
i
is 1 .. 0
1 3 6 0 3
ly c 131 1 0,2
d c .. 7 2
an ver .. 6 0
.,3 0 1
Sl OL!Ql'l .. 6 0 1
c .. 9 0.,
--~~ -------
1 mai i
season v~ere eva 1
u inually 1
r e1 (
) 1
11i ( ) 0
I" .)
1.,0 i over
a 1 i
0 .. 2 ( i .. e .. , 0.,4 i wa ) ..
programmed to record t
i ls on a UV-erasable, id
( ) c Using a 60-minute recording interval, :i
in 40 :) and then mu be exchanged for an ( c 1 ~ea
res involved in the install on moni
can be in FY84 ADF&G Su Hydro ic ies p "es
Manual Final Draft ( AOF&G 1984) ..
2 .. 2 .. 2
Di me as were i in ion :!
area s d
or me di ' a
was also i
1
2 .. 3.,
i mains i
to proj
were
daily discharges of mai
d (USGS 15292000) were plotted as simple
curv th water surface elevation presented on y axis mean
i ma i n stem on the x ax i s .. At 1 ion
on bing ·the relationship of each plot was also
2 .. 3.2 Side Channel, Side and UE]and Sl~aHabitats
1 stage data obtained at side side channel and slough (si
and) habitats were reduced to trtu~ water surface. e'levations (as
referenced to project datum) and plotted against the mean daily main.stem
dischar"ge recorded at Gold Creek (USGS 15292000)., In addition,
data collected in conjunction with discharge data at the stage/discha
monitoring station located ·in the free-flowing portion of each study
site were platte~ as, simple stage/duischarge rating curves .. tvleastu~ed
site discharge was also plotted with corresponding mean daily mainstem
dischar,ge as measu at Gold Creek {15292000) •
. J
i i
i i
20 were as
curves e At si i was moni
nuous data ('Portage d '
ver) measu of water depth were mean ily
of depth obtained in conj ion
were plotted as simple rati curves ..
curves, discharge levels were estimated from nuous
depth for Portage Creek, Indian River, ld
-I
was monitored at 46 stations in the mainstem from Ta 1
Devil Canyon during the 1983 open water field season. All
measurements were converted to true water surface elevations as
referenced to project datum. These water surface elevations, along
corresponding mean daily discharge of the mainstem Susitna River as
measured at the USGS Gold Creek gaging station (15292000) are tabula
in Appendix Table 1-A-6. These data were used to generate simple
surface elevation/discharge curves (Appendix Figures 1-A-1 .... 1 ) •
The mainstem water surface elevations obta·~ned LRX 53 incl
the ~983 data. 1983 and 1982 staff gage sites were not in
1 on for each years observations~ main stem su
i for were lly
0 Og
0 -
APR~L
us
MAY
F re 1
31 15 30
JUNE
of mean dei
R
SUSITN STATIOH
(USGS 152 50~ R~
YENTNA RIVER
(USGS 1529434~8 RN
SUNStUNE STATiON
GS 152927 RM
GOLD CREEK STATION
(USGS 15292000, Rhfi 13i")
CANTWEll STATtON
(USGS 152.91500D RM 223
~5 15
JULY AUGUST
:\ t
at
·.
-
1 of ma
2
A ~~ \
\
I \
\
\
\
G
surements of s and dis were i 1
eld season at selected si thir. five si c nnels 1
i 1 nyon reach of the Susitna River., sul
investi tions are below by si
3.2.1 Mainstem 2 Side Channel (RM 114.4)
n 2 Side Channel (Figure 1-3) is located on the east bank
sitna River at river mile 114.4.. It is approximately one mile in
length and is separated from the mainstem, by two relati y la
vegetated islands., A fork, approximately 0 .. 3 miles upstream
of this side channel, divides the channel into two forks,
as the northeast (NE) and northw~st (NW) channels. Prior
breaching, flow in the side channel is provided by local surface wa
runoff and groundwater inflow. Subsequent to breaching, the majority of
the flow i ~ pr'"ovi ded by turbid water from the rna i nstemo A substantia 1
area of backwater exists at the mouth of this side channel during
low and high mainstem flowso
During the 1983 open water field season, stage was monitor·ed at seven si
within this side channel, at which streamflow was also manito
of these sites (Figure l-6)o
F re 1 t at
su e evation i
time
in 1 1
on a1 mains
i each moni
di
i on are
streamflow along with
evation and mainstem di me
are presented in Appendix Table 1
3e2ol.3 Stage/Discha~ge Relationship
Simultaneous measurements of stage and streamflow were obtained n
free-flowing portions of the NW and NE channels of the Mai 2
Side Channel study site (Appendix Table 1-A-8)e From
measurements, simple stage/stream flow rating curves were devel
each channel (Figures 1-7 and 1-8) .. In addition, the streamflow
obta~ned in each channel was plotted against the correspondi mai
discharge at Gold Creek (Figures 1-9 and 1-lO)e These curves
breached hydraulic condition of each channel.
)
F re 1-7 S
I
r = 0.,9961
ISCH RG
rat s.
GOLD CR {xl cfs)
tem II S 1 (N
-
w
E
versus f
114 ..
EAT
rat curve
EK (x s)
Ma tem II S
s
(N
"'10.4320
0= 10 (WSEL-
r1= Oo9973
s (f )
rat
-
{ EL-
)
0 s
(N .. E ..
rat curve t
on avail 1e ow su ~,
ii,;.;;i on
siona1 ic
in s mains
11 of 16,000 ld
vell, • ..} 0 b i
for the NW ls
d ' respPr:tive1y ..
A area of backwater occurs at the is si
periods of low and hi mainstem flow. Based on avail 1e
channel geometry data (see Cha.pter 2), the area
to a point least 2,000 feet upstream at mainstem
from 16,000 to 31,700 cfs .. , at Gold Creek.. At a mai
scharge of 7,000 cfs, however, this area of backwater became
in size extending approximately only 800 feet up the side channel.
3.2.2 Side Chan~e1 10 (RM 133 .. 81
Side Channel 10 (Figure ) is located on the
River at ver mile 133 .. 8"' It is approximately 0 .. 4 miles in 1
is mai by a la
o-
in s si 1 is i
i
A s i
mai
water d season, was moni
is si channel, at which discharge was so moni
sites (Fi 1 1).
3.2.2.2 General Results
of surface elevation and corresponding mai
at Gold Creek at time of measurement for each
on are presented in Table 1-5. Measurements of
on along with corresponding mainstem discharge at Gold
of measu~ement obtained at each monitot .. ing station are in
Appendix Table 1-A-7. Plots of water surface elevation versus
corresponding mainstem discharge at Gold Creek at time of measu!f"omt:~n,..
for each monitoring site are presented in Appendix Figures 1 47 ....
1-A-39. Measurements of streamflow along with corresponding
measurements of water surface elevation and mainstem discharge Gold
Creek at the time of measurement are presentgd in Appendix Table 1
on Si
i
si
in
( 1
STAFF GAGE
0 250
~~ I I ---
34
........
F re 1-ll Site Clap f Sid 10D ich s locat on o he
sitna R r t 33.8
1 1 "
u ...
u
w
0
en
F 1-12
a..-.....--Q: I EL-
0.9796
curve
-
(feet)
s f
r
10
s}
J s
X 1 1 } G ow
a si
1-2)G n ow i
was pl
me
in is i
in geometry the
station.
on available streamflow and water surface el on
i opinion of the project engineer, the lie
in is side channe 1 become governed ma i
contro11 ing breaching discharge of 19,000 cfs at Gold
controlling breaching discharge is the same as the 1
breaching .discharge ~or this side channel.
An area of backwater was observed to occur throughout the
water field seas9n at the confluence of the side channel
i
mainstem Susitna River. Based on stage and channel geometry (see
Chapter 2), the area of backwater extended
upstream
From
1
mains
mainstem discharges as low as
rison of surface
a of
a point 1
,000
ex
area so
Si 11 (Fi 1-3) is 1 on
ver ver mile 6eo is les in
is from the ma i nstem by at we 11
of confluence of Slough 11,
, a NE fork and NW forko Prior to breaching
vi i
ow ir is si
clear water flow from ough 11
groundwater seepage. Subsequent to sufficient
flow is provided by turbid water from the mai
was observed at the mouth of this side channel@
1
ng the 1983 open water field season, stage was monitored at r si
n this side channel, at which discharge was monitored at one
si (Figure 1-14).
3.2.3.2 General Results
Ranges of water surface elevation and corresponding ranges of mai
discharge at Gold.Creek at time of measurement for each stage monitori
station are presented in Table 1-6.. Measurements of water su
elevation along th corresponding mainstem discharge at Gold C
time of measurement obtaitted each monitoring station ar~e in
Appendix Table l-A-7o of e 1 on versus
; i d
ST f
re 1 i t
1-
2.
2.50
4.
2.
i si are
i
me are in
3.,2 .. 3.,3
of and ow were i n
owing portion of the Channel 11 X
) . From these emeasu ' a simple ow
constructed (Figure 1-15)$ ow
~01\.)t+ot;4Uj &tt::f./o,v W(\. ~
mainstem discharge at Gold Creek of measu
( 1 ) " Both these curves s OW
ng breached conditions.,
3.2.3 .. 4 Mainstem Controlling and Breaching Dischar~!
Based on available streamflow and water surface elevation data
professional opinion of the project engineer, the hydraulic ons
present in this side channel become governed by the mai a.
controlling breaching discharge of 5,000 cfs Gold C
controlling breac~ing discharge is the same as the 1
breaching discharge for this side channel.
-I)
This
Q = EL---
100~--m.---~---.--~---F----~--~~--~~~-F------~--~--~--~--~-~
.· a
L-6 ( f t)
5 f curve s
N DISCHARGE D E (x c
re 1 6 ~~ufla.:U.IUI\1; l f versus
Vi!U;li.II.UIIII'.;O l 11 9 fJ f
-
area
1
Prior
3 2.,3 .. 5
d season ..
3~2 .. 4
was
mai
occur
Channel 11 (Figure 1 ) is 1 ·on
ver river mile 136,.2.. It is approxi
mou
is separated from the mainstem by a 'large
of Slough 11 confluences this side channel just
breaching, flow in the side channel is provided by 1
groui1dwater seepage., Subsequent to sufficient
majority of the flow is provided by turbid water fr~om' the mai
area of backwater occurs at the mouth of this side channel
mainstem discharge ..
si
es in
During the 1983 open ~later< field season, was monitored ve si
within this side channel at ow was also monitored one
of these sites (Figure 1-17)~
3.2.4 .. 2
on ma:i
1d r i
F re 1
Q
STATION
1 Site of
of
136.2W3-
are
mile "l 6 .. 2 ..
s
on
1 1
(
(
( )
)
2.
2.,
1 .. 38
2.87
2 .. 72
i
of stage and streamflow were obtai
owing portion of the Upper Side Channel 11 s
le 1-A-8). From these measurements a simple stage/
curve was developed, (Figure 1-18). The stage
ationship occurring in this sidechanne1 is found to change
upper range of stream flows with a point of inflection
occur at a flow of 403 cfs ~~ Only one flow measurement was
while the side channel was not breached. In addition,
obtained at this mon·Jtoring station was plotted against
mainstem discharge at Gold Creek (Figure 1-19).
3.2.4.4
on available
siona1 opinion
0,1 su
ineer,
on
1 i c
ow
5 { fe )
1 f curve s
N DISCH~_RGE )
'!a911i.iu~~~~~~~.jn••l f v~rsus ma tem
'io!l'ilal~~IUI-'Iilliii 1 llil
n is si
rea of
ring peri
on avail e s
was observed to occur
madera te and hi
channel geometry (see
1
is si
mouth
, an area
was observed to occur at the mouth of this 1 a
1 400 ft. upstream at mainstem discharges as low as 11,
Gold Creek.
3.2.5 Side Channel 21 (RM 141.2)
Side Channel 21 (Figure 1-3) is located on the east bank of the Susi
River at river mile 141.2. It is approximately 0.9 miles in length
is separated from the mainstem by a series of well vegetated isl
gravel bars. Prior to breaching, flow in the side channel is provi
by flow from Slough 21 and local runoff and groundwater
Subsequent to breachi , flow in the si channel is provided ow
channels which provi turbid wa from mainstem.
of this de channel hi mai ows~
d season
moni moni ons ( re
3 .. 2 .. 5 .. 2
discharge at time of
monitoring si are presented in ~~ppendix Figures 1
surement.s streamflow along with corresp~nding measulf"t:llll'1ncn
r surface elevation and mainstem discharge at Gold Creek
measurement .a~e pres~nted in Appendix Table 1-A-8 ..
3 .. 2 .. 5 .. 3 Stage/Discharge RelationshiE
Measurements of stage and streamf1 ow were obtai ned at
within the free-flowing portion of Side Channel 21 (Fi
Appendix Table 1-A-8). From these measurements, simple
1
flow rating curves were constructed for each location (Fi 1
1-22). Both curves streamflow conditions in
duri le channel was b
In ined 1
ons
140.iM4
1
.J.. 140.6S4
ADf a G
Q STAT ION
142 .OS6
RaM STAff GAGE
on f
1 1 "
)
)
1.
Oe
2" 2.
1.
2 ..
3.31
u
w
F 1-21
EL-730( t)
s l
F
Q = IOT .. G?GO(
r 2 = 0 .. 9746
WS L·-
rat curve
(f )
s f
i 1
cur·ves only ons in ~.
·'
O\tt i 1 e si was b
on avail 1e ow and su on
iona 1 opinion of project engineer, the lie 1 ions
in this si channel become governed t mai
ma i nstem discharge of 12 ,000 cfs d
11 ng breaching discharge is the" same ~s the 1
ing for the AS overflow channele
area of backwater was observed to occur at the mouth of this si
during periods of high mainstem discharge. Based on avail e
stage and channel geometry (see Chapter 2). This side channel has
observed to have an ar·ea of backwater high mainstem discharges.
3.3 Side Sloua~
Measurements of stage and discharge were obtai ned during the
water field season at selected locations wi th i n n i ne s i sl
sites located in the Talkeetna to Devil Canyon reach of
River e ) . ts of these i ons are
si lll
n
I
0~
-
u
s)
z
IN DISCHA CR EK(xl
!
3 .. 3 .. 1 .. 1
During the 1983 open water field season, stage was moni
sites within this side slough at which streamflow was also measu
one of these sites (Figure 1-25).
3 .. 3.1 .. 2 General Results
Ranges of water surface elevation and corresponding ranges of mai
di at Gold Creek at time of measurement for ea
station are presented in Table 1
elevation ong with correspondi
i i
d c
n
'
s on
at r
1
(
( ite)
(Mouth)
8,
8
------~-------------------------*--------------------· ----0
of stage and streamflow were ined
on of Whiskers Creek Side Slough above i
Creek (Figure 1-25, Appendix e 1
a simple stage/streamflow rating curve was
( re 1-26). This curve represents streamflow conditions
and unbreached conditions. Insufficient flow
available during the breached condition to plot the slough flow
mainstem discharge.
in
uence
was
3.3.1.4 Mainstem Controlling and Breaching Dischar·ge~
Based on available streamflow and water surface elevation data
professional nion of the project engi ne~~r, the hydraulic ons
present in this si slough governed by mainstem · a
controlling mains tern discharge of 23,000 at Gold is
1i breaching di the 1
i di d ·Js i s1
-6
2
( EL-
(
1 curve s
Si
rs
low as 8
3 .. 3 .. 2
3 .. 3 .. 1.5
area of
low hi
of this
occurs
di
slough mai
ough 8, also known as Lane Creek Slough, is 1
1
on
1 c
on
the Susitna River at river mile 133 .. 6, (Figure 1 ).. is
a
a
imately 0 .. 4 m11es in length and is separated from the mai
1 vegetated bar.. P_rior to breaching, flow in this side sl
ded by local runoff and groundwater seepage. Subsequent to
ci breaching, flow is provided from turbid water in mainstem ..
area of backwater occurs at the mouth of this side slough during
of moderate to high mainstem flows ..
is
During the 1983 open water field season, stage was moni at ree
si within this si slough, at which streamflow was also mea
one of si (Fi re
6
~suS!TNA I
Site .
1
1
3 .... 2 .. 2
su
d
le 1-A-7 ..
el
in
i
on
me
Plots
ng mainstem discharge
corres
su
Gold Creek
site are presented
Measurements of streamflow
water surface elevation and mai
me of measurement are presented in
3.3.2 .. 3 Stage/Discharge Relationshi~
le 1
rements of stage and streamflow were obtained within
i
d
owing portion of Side Slough 8 (Appendix Table 1-P-8).. From
these measurements, a simple stage/streamflow rating curve was
constructed {Figure 1-28). In addition, streamflow data obtai
is site were plotted against corresponding mainstem discharge d
Creek at the time of measurement (Figure 1-29).. Both of these p·r
represent streamflow conditions during periods when the slough was
and breached by mainstem discha
1 "
1 ..
113e
1
( )
(Q-Si )
0 .. 80
2.78
3o
9
9
)
-31,
0 {fe )
F 1 versus rat s f 113
--
Q
r
STE X (1000
Figure 1 Slough f versus ma tem d curve s
S 8, staff 113$
2 ..
avail le s ow r su
i on
in ·f s i slough
1 1 mad d
i is same as 1 i
is si
rea was observed occur is
of moderate to high main on
avail 1e channe 1 geometry (see Chapter 2)
occurs the mouth of this side slough at mai ows
ri Creek as low as 11,600 cfs.
3.3.3 Side Slough 8A (RM 125.~
Slough SA ( Fi 1 ) is located on the east k i
ver at river mile .,3. It is appro)dmate ly 1es in
is from mai i is-
1 0 .. 5 miles u
i ' a are
on si one occu iu t,J
p
si
ow in
as
occurs
hi mains OWSe
ree
is
si
wa
(Fi re 1
i
mains
i si
e 1 d season,~
i sl
of surface elevation and corres
at Gold Creek at time of measurement
station are presented in Table 1-11.. Measu'
1
was moni
ow \~as so
evations along with corresponding mainstem discharge at
time of measurement obtained at each monitoring
su
in Appendix Table 1-A-7,. ots of water surface i
versus corresponding mainstem discha at Gold cit
measu for each monitoring station are
Fi res 1-A-32 1 of
d c me .measu are
1e 1
in
ow al
mai
X
-
STA GA
0 2000
FEET
F re 1 Site map of
of s1
c Slou loc e on east
(
(Mouth)
04>55
Q-S i ) 1.
0.
Oo
0.,
0.,
2~61
3.,
i
only
b
3
ow \t,_t!re
,
5I si le ow
1 1 1 ) 6 cu»~ves
le the s1 was
on for the curve
ow conditions ri
rge station
WaS also plotted agai corres
ld c (Figures 1.-34 1-35) 0
ows in the N E chan ne 1 , th ·i s s i was pl
3 .. 3 .. 3 .. 4
Based on available streamflow and water surface elevation
i
i
professional opinion of the project engineer, the hydraulic condi ons
present the NW and NE forks of this si slough become
mainstem at. a controlling mainstem discharge of 27,000
controlling flows are the same as the 1
observed b ing discharge
3 .. 3 .. 3 .. 5
a
sl 1
each fork ..
occur
mai
i
d
1
= 10 .. t~.o (
0.9726
)
F 1 fl rat
1
re 1 versus
at s
5
s
1
(
r =
1
( ) 1
mai d
wa
in is si sl
si ( re 1 )
3 .. 3 2
wa ce
di
n
d season,
i ch
was
ow
i
1
)
)
0.,
1 ..
4~
i
1
1
measu
1 1
streamflow were i i
on of Side S 1 9 (
and those obtained by
were pl as a simple stage/streamflow cu
) ., The stage measurements obtai simul 1y
ow measurements in 1982 have been found i
the stage measurements corresponding
This variation has been
Because of difference
ons lines
at ions n
i
d c ( re
(
(
10
'1 a
t,, :ur
to high mains
(see
at mouth this si
5 cfs.
Si 11 ( re 1 ) is 1
ver
is
mou
2)
s'iough
on
i
i
at
i
si
on ava
, an
mai
i
y 0 .. 9 les in 1
sl
1
d s
in is s1 i ow
si ( re 1 ) ..
su ns
d at me of measu
in Table 1 3 ..
on a1 th corresponding mainstem
obtai ned each moni
11 are presented in Appendix Table 1-A-7 ..
on versus corresponding mainstem·discharge at Gold C
for each monitoring site are
Measurements of
ng measurements of
di Gold at the
Appendix Table 1 o
3 .. 3.5 .. 3
i n on
ow
ion
are
ow \~ere
1 (
i
X
in
re 1
sU 1 rN
ADF&G Q
STATION
f
i
on
onl
i
area backwater was observed to occur at mouth of is sl
ods of moderate to on
avail and channel (see ' an area
occurs this si sl a mai
as low s area is locali n
sl
t)
1 11~
s
of
.,3 6 1
1 is 1 on
( ) G i
mai a 1
nw in is si is i
i
open water field season, stage was moni
in thi side slough
sites (Figure 1-41).
which streamflow was also measu
3.3.6.2 General Results
surface e 1 evil t ion and
at Gold Creek time of measu
are in le
on a1 mai
1
e
mai di d
moni i are in X
ns
at
in
s
s GAGE.
FEET
Sea It )
STATION
137. I
1
)
)
1 ..
l ..
2 ..
11
11~
3
s ow i
e 3). , a
mai
(
3.3.6.4
on ava i 1 e ow and ion
p
in mai
li
ing 1
s si <II
( )
versus f s
1
f rat
i1 1 )
occur
is 1 on i
<)2 { ) e It is 1es
mainstem by a isl
' ow n this side slough is pro vi
es and ·local runoff and groundwater
ent breaching, flow is provided primarily by
nstem ana the la.rger of the two tributaries
area of backwater occurs at the mouth of is s1
Duri
si
one
ods of low to hi mainstem flows.
1983 open water eld season,
s si
{ 1 ).
was moni
'11'111.5!!lilf'n"'l" ow \'lias a 1 so measu
i
or
11
E
Df &G
STAT ION
SUS IT I
in
on
are in
ow aJ
on i
are i
ltaneous measurements of stage and streamflow were i one
si thin the free-flowing on of Side Slough 20 ( x 1
) .. Fr·om these measurements, a simp 1 e stage/
was (Figure 1-45)~ This curve
tions.. a.ddi
was was i
ma1 di d { 1 ) "
) 2
)
) 7
'
rat s
r
avail
l i
i
i
in
e
ni
4
3 .. 3 .. 7 .. 5
was
i
1
d is si
occur
moderate to high mai
channel geometry (see
occurs in the immediate vicinity of
1 a mainstem flows as low as 7,230 cfs at Gold
3 .. 3a8 Side Slough 21 (RM 141.8)
3.3.8.1
Si Slough 21 is 1 on bank Susi
coB { is 0 .. 5 les
a 1 is1
lf 1 vi i
, ow in is
i 1 1
i
on
ver ver
in is
·f
n i 1
is i s1
d season~ mon
in is si i ow mon
si ( 1 ) ..
on corres rna
in e
th corresponding main
.,
t monitoring on i
Plots of water surface
ng mainstem discharge at Gold Creek
each monitoring site are presented in Appendix
Measurements of streamflow along
surface el on mai
at the time of measurement are e 1
Simul ow was i
si in ow Si
140.6MI
te
t
140.6S4
AOF& G
0 STATION
142 .OS6
R & M STAFF GAGE
2
~~~~~
(' ) 0@ '
( ) 0@
I ) 2., \
( ) 2e 7
lO
1
( )
on avail e ow su on
i neer, 1 'l 'i
s of ~i ~
1 ing discharges
These controlling di
s 000 and 26,000 cfs Gold C y
3.3.8.5 Backwater
ava i 1 ab 1 e stage and channe 1 geometry (see 2)
d observations no backwater was found to occur in this si sl
Si S1 is 1 on si ver
ver mile is i in 1
is mai a narrow i 1
--
SEL-
S L-( )
1 rat
r
(f)
t
2
i
r is s
is
occurs
sl
d season
i
i 1 s
11~as moni
n was ·1 so
evatiotl
at time of ... _ .... _ ... Y~~amtflllf'il'll"
in Tab 1 e 1-17 il
on along th corresponding mainstem di
measurement obtained at ea(:h monitoring station are
I"U'"iU!!I\il"'l.?11ix Table 1-A-7 e Plots of water surface el
ng mainstem discharge at Gold at
each monitoring site are presented in Appendix
Measurew.~nts of streamflow along
measu of surface elevation mai
time
s
mai
d
le 1
i
I A I
1
i on i
si
1 l)o is curve
ons .. I on
i
measu ( re 1 ) 0
on avail e ow su em
i on lie
in is si slough mai
li mai discharge of d
1 i di rge compares the lowest i
cfs at Gold Creek for this si
on available and channel geometry (see 2)
e 1 d ob se rv at ions very 1 itt 1 e
s s1ougho
occurs at the
ow were i
si in 1
i
is
1
1
s
s
E C E K )
rat
sources
. .,
rj
3.. 1
ver
is
ons are
( }
1 <03@
mai
is s1
A
slough
ow
is 1 on
1 s t no
it's
1
during low hi mains
the 1983 open water fi e1 d season, stage was moni
1 ........... ,,. ....... ons \lrfthin this upland slough at which ow was also
at one of these site (Figure 1-53}.
el on mains
on
1d me
i on in
s u
Sl.AFF GAGE
0 L __ ,....,.....J
fEET
f AlP6U'it'dJc II ~Sill)
\
~--s str I
i
7
d
in
ow
in e 1
Simu1 measu ow were i
( Fi 1 , e 3) ..
i at this site, a ow curve
could be constructed.
3.4.1.4 Backwater
.........,..... • w
A a1 area of backwater occurs at mouth of
slough during peri of low to high mai on
avail le stage and ch.anne 1 (see 2) ' an a
occurs the mouth of ic:
l-upl sl mai
1 s as low as 7 cfs.
3 .. .,2 ..
( re 1 ) i 1 on
ver 1e in all t
it is
ow
area is s1
low OWSo
d season, was
ons in this upland slough
one these sites (Figure 1 ) ..
of surface elevation and corresponding mai
scharge at Gold Creek at time of measurement for each
on are presented in Tab 1 e
on ong th
obtained at on are
X on versus
mai measu
are X
s 19
E
5
RIV ---
Iough I
)
7
1
s si
could
al area occurs
low to high mai
geometry (see Chapter 2)
occu of this si slough
3.5 Tributar"ies ----
Simu1 taneous measurements of and
ected tri es thin 1
i ver. ts are
c ( ) i 1
i
, an area
a mai ow
ow were i in
1 .
ow si
i
i i
mai ows, an area i
d season
one 1 on in s ( re 1 )
surface el on al
at Gold Creek at the time
toring station in Whiskers Creek are
e 1-A-9. Measurements of streamflow along wi
of water )Urface elevation and mairistem
at the time of measurement are presented in Appendix e
Simu1 s
the
e 1
0\111
of
curve (
I
ow were i
were
1 ) ..
1 i
1
1
3 .. <> 1
( is 1 on i
o6 It can
runni , clear~ i
d season, was
ow ~Jas so mea
3. 02.2 General Results
of water surface elevation along
discharge at Gold Creek at the time of measuw•anriDH
monitoring si in Lane Creek are presented in
of streamflow a, 1 ong with coJ"'resolJna
surface mainstem discharge Gold C
corres
measu~Q~~m~~· are presented in x Table 1-A~B~
ow were i
si c
1
(
e
I --
,.
Ll 2 t.i ~ ~~
s E L GP ( ... i
1
1
9
i
Si 1
i
1
y
i
1y
1
3 "1
(
ows i
, narrow,
It can
11ow
d season
one s~i n is ( re 1 ) ,
of water su
scharge at b~ld Creek
el on ong
the time
monitori station in Fourth of July
of ow along
mai
in
on
X le 1
0'11'1
d c
X
measuremen
{
4t J CR
ST GAGE
150 • ____ _.j
F ET
~f.H'IU. l<ilih)
K
I
)
1 ( r~e 1 ) is a
i ver
as a y sma 11 i
es ..
d . season j
one si in is ( 1 1)~
3 .. 5 .. 4 .. 2
ti
are in e 1
Simul ow were i
si
1
~--~--SUS I
GH 2
rooni
imu
one si
of
( re 1 } i s a sma 11
occurs
i ver
y narrow,
hi
water fi e1 d season, s
thin this tributary (
elevation
Go 1 d Creek at the time of measu
s on ar~e presented in X le 1
ow along cor res
mai
are in X e 1
3 .. 5 .. 5 ..
measu ow
ow
corres
su
su
time
i
(
-........,_,SUS IT I
8 o. a
i cu ( .. . l
3 .. 5 .. 6 .. 1
d c ( 1 ) is a urn s ·i
i ver on k 1 ~:!! 1
as a y runni 1 r
i ma s frles ..
water fie 1 d season~ was moni
d Creek. At one of moni
was continuously monitored usi
a associ pressure transducer. In
odi ca11y rnonl the si which
moni {Figure 1 ) ..
su el on) i s
ions i mains
ld
le 1
mea
L. 7
SE 3 {f t)
versus flow r ti curve
f.f 1
re 9 \t1hi l
m 1
a
in ld
e curve ( 1 ' ) "
on r
i
hourly ow
in
3o5 .. 7
I an ver ( ) .; a re1 y 1a ·f a
ver ~Jences
1e .. 6<11 can as a
' clear consi i ls
T
0.,
0 ..
0.,
1.,
(
DEP F R { et)
f rat curve
I
nuous
( re )
su on i
ng n I
le ow
of su on in
d at the time are
e Js Measurements of streamflow a1
ng measurement of water depth obtained
are presented in Table
Simultaneous measurements depth and ow were i
si of the continuous I an ver ..
were to a simple curve ( 1
1 i ne {a 1 on r
ow was
ver nuous
i were
1
0 F (f )
1 1
in
3 .. 5 .. 8.,1
( 1 ) is a ve 1a
s es., It
River at river le .. 8
field season, was moni
using a continuous stage a
ition, streamflow was periodically measured is si (
ow ong mea
i sure a in
...
~~
·•. ·~ . ..
·.:: 148.STI
DF&G Q
ow are in
{ ~ ..
i co 1 n
on va ou i
in
ow
V....UII>IiY'Ures
1981 open d season
hi 25 year streamflow ly
the 1983 water fi d season, streamflows 1
7,500 cfs on October 9 to a high of 36,000 cfs at ld
in
on ) 1 i ip
ma1 1
i
mai
1
i
si
i were
) '
i i
i
In
as mai
was also
on
ow condi
related to
ows are small
1
di
i
on
ons
i
uence,
ons
mainstem
and
Streamflow is primarily contri
1i or seepage, wat~r runoff, and tri
va
occur
or
in
i ow ..
occurrence of breaching a si channel or si sl
i higher 1 s mai di , a success on
occurs in
occurs in succession mai b i
i on
si
i 1
i
is
c 1 1
hi
s
n
at 1 occu
i
1 i
i ose if
1, ini breaching scha for si
for si sloughs. Initial mainstem i
ected for study in the middle reach of
from 5 ,000 to 20,000 ( cfs) as measured the USGS
station§
sloughs in
,000 ,000 ( ) as
on§ ( le 1 )e
di
to mainstem
e reach of
i di
d
i i d
on si
i
i
1 .4
1 .5
.2
11 .o 5
11 .2
.. 6
.9
Si Slough 101.2 22
8 1 .6
.. 2
.. 7
Si 9 .3
11
Si .2
7
n
'
in si
a s
i
of
are
d
11 i
on
,
our ic
on mean i
on.
se s, some error
erro1"" is i
1
i
1
occu
1
ons in es in
i
1
~"JW
mai di
sl i
li
ow
1
ume ow
)
d (c
11 ..... """ ........ ,.. ow for i
of i
curves
ow es
i
)
$ 1