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Dear MI·. lson:
comments
a copy to me~
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Data
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from high scouring
surface water supply;
suitable substrate nearby;
food base; and
suitable water quality.
.. ,
Sloughs 8B, 8C, and 9A and Curry Slough for this
study based on our knowledge of how these sloughs met
Studies
studies included collection of some or all of the following
at of the selected study sites:
o stream flow;
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rate;
water temperature;
dissolved oxygen;
conductivity;
thalweg and transect surveys;
water levels; and
elevations at head the slough.
discharge measurements were conducted using standard techniques.
0
were measured at intervals across the channel a
meter.. Each measurement was taken at a locatlon in the -
is 0 .. 6 depth down water
by subsection area to get a
are summed for all subsections
were measured a simple coffee can
coffee can was into the bed in
the water to an equilibrium
the equilibrium is
through
rate ..
at
measurements rates
an area
free water
~~-..L., ""·"'"'""" , the
These
These
3
Gilbertson
Si 1984
o temperature, dissolved oxygen !t conductivity of stream and
upwelling water;
o thal~veg profile near the mouth; and CO~J~~r;~~.n,·~..-\L: FR.V!L:;:1E!J
o overflow elevation and adjacent water level F!=-t00~.'CT ~:
are presented in Figures 2 and 3.
collected at Slough 8C include:
thalweg profile of lower end; and
C? t.n-~GAT~C ~~; RESTRICTED
C·iS.iT!iSUTiON
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0 overflow elevation and adjacent high water mark.
are presented in Figures 4 and 5.
Slough 9A
Data collected at Slough 9A include:
o 4 streamflow measurements;
o 2 measurements of upwelling rates; and
o temp~eratures of surface and intergravel flows.
data are presented in Figure 6.
at Curry Slough include:
o temperatures of surface and flows;
o thalweg sur1ey;
o adjacent water level; and
o one transect.
in 7 'J 8,
counts in are as .. ..
1
1 80
0 5 0
4
2 0
1
2 1 1
0 0
0 0
April
4
CONCLUSIONS
C ""'·:r:-,~"'7~ lTf t· l • c!"'\,vu r:~r-o ,~,o-r;\.d .... • . , .. * .. '"-.. , nt ''-L...'-'·~-"l; r\l\.
F::-: ·_; ~REPARED lN ANTiCiPATION
c-:: LTlCATiON; RESTR:CTED
OiSTF1J3UTION
Consultants conducted a reconnaissance-level study of Sloughs
, 8C, 9A and Curry Slough to evaluate their potential for use in a
slough mitigation demonstration project. The physical data collected during
this study were used to rank the sites; at the present time, the sit~s are
ranked as follows:
1. 9A
2. 8B
3.. 8C
4.., Curry
Further evaluation of additional criteria will be conducted during the study
design ..
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s
,. ..... • ••• fl It·.·~~~·.·~ .... :..;... ......... -........ ~· ~~·..;..: :.:·. -2:~ .::..·· ;.;>..:.'· ·::..:.· ·.:.:.:=· ::.:..,: ·.:.:..· . .:.:.··,:..,:,· ·;..;.~.:-· ...... .,..-"'_ .. ~· --=· --)
/ -----_. __.,.,. -
----------------_? )
( ~/ ....__
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l
500
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SCALE
I H. I
1000
I
---OYer topping eleva I ion at
upstream end.
----W.S. elevation on 24 Oct. 82 at
upstream end.
_____ __..,.,.,....,.-----......
,r-Berm 1:&. 551.78 ft.
ti/W Mark E S 55 . 1.50 tt.
{ ---
/ ~----...........
I I _....,.,
L_----~~----
LOCATION
under
1 .. 2
3~2
1~3
3 .. 2
2 .. 5
7
Overtopping Elevation
on island at Dawnt~tre1am
End of Berm
Cut
0 20 40 100