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HomeMy WebLinkAboutSUS439[}{]~OO~~CI [gOO~~©@ SUSITNA JOINT VENTURE INTRA-OFFICE MEMORANDUM LOCATION Anchorage October 25,1984DATE _ FROM E.J.Gemperline 42.2.7 fran D.Beaver to NUMBER _FilesTO SUBJECT -=----:._ We have continued to refine relationships between slough discharge and mainstem discharge presented in our report "Slough Geohydrology Studies," which was transmitted to the Federal Energy Regulatory Cailmission (FERC) with the Alaska Power Authority's comments on the Draft Environmental Dnpact Statement.The subject memorandum (attached)includes these refinements and additional information relating slough .discharge to mainstem stage at locations for which mainstem rating curves are available.This information supports the conclusions in the referenced report.Based on the information contained in the subject memorandum the apparent relationships between the groundwater component of slough flow and mainstem stage and mainstem flow are given in the following table. AppareDt IlelatioDships Between Groundwater CaapODeDt of Slough .Flow ad llaiDst_Stage ad Maiut_Discharge (aeasared at Gold Creek) () Slough Relationship to Mainstem Discharge ~ Mainstem Flows Used in Developing Relationship Estimated Slough Upstream Berm Overtopping Discharge (cfs) 8A S=-0.627 +0.000128G 0.631 16,000 28,000 30,000 9 S=1.97 +0.000351G 0.805 9,000 15,000 16,000 11 S:o::1.51 +0.000102G 0.766 9,000 35,000 42,000 21 S=-2.71 +0.000803G 0.916 3,000 25,000 24,000-26,000 Location of Relationship to Mainstem Mainstem Water Water Surface Slough Surface Elevation R2 E1evationll 8A S=-740.96 +1.2737W 0.626 RM 127.1 9 S--877 .21 +1.4658W 0.755 RM 129.3 11 S--367.04 +0.54004W 0.783 RM 136.68 21 S=-3244.1 +4.3212W 0.938 RM 142.2 Definition of variables ) S =apparent groundwater component of slough flow measured in cfs. G =mainstem discharge measured at Gold Cr~ek. W=mainstem water surface elevation at given lo~ation. liThe rating curves for the given locations are attached. 421051/10 • 550- ..J W> ~55'(o- ccwen zccw584-::E w>om cc c8r'J _ ~~':..- W W U..zo;::;:;80 -cc .... > W ..J W SUSITNA HYDROELECTRIC PROJECT STAGE DISCHARGE CURVE RIVER MILE )27./ 60,000 ) ..':~4 .....1---..\---..,---1 1 ---..1---.,.1---... o 10,000 20,000 30,000 40,000 50,000 DISCHARGE.CUBIC FEET PER SECOND HARZA EBASCO JOINT VENTURE OCT 1983 •--.-.~••_.':'.---•..1 '_.;,I :;----~+'_.~.~.::= ~::-....:'1,.~,'~.}:-.~:~::i::-.:.=:.'j.~-=:::':":~:'i'.j ....._. ~--.I -------:--0·,•..__..-_....01"'"-- '--'-'.----...__.-.~-...--1---..--,-.._...--......;.--_..;.---.-~.-...-..-.-.-·-·---4----.--~--_...-.._--..-.......-----..--.._.--····T ..--'_._....."....____--..'..I .•.••.._..._••, .__. -:::'-::1'::-.I :.-==---::-~.-:-~::I-.--.....!.~~..-_._~-_.r-...._.-- :.::-.:-..:i ...-._--:.:~-r------:-~--:.~':.-~~-.-:.:-:-~:::::_::1~~~~" -:~.~-~:_;=.:.:::.-!-:=~-"l .~~._':-~-'':~:.~._;,__u. ---'-'"1 - -._._-,*...._.___~J .. -_..f· _·-t---._.-J._-_---'----.'------1 - - . -...J ..•-_...:..~--~--1'--.-.-----~-----l--------f __.--.1_-.- --::::..F';:·:'::'.==I-=-~-.::-:..:.::r-:=.:-::::::--:.-=f.:=='-==1 ..-..l'-=-=~:- :I .._-,-.-"--'-.1r·----------r ---i--.-.--.-'--1-..._--..:.-.---.~.---- ----_._.---.----.-1-.----.-._------i---·-.:::._-::-:-' ::='i ::::.:':"-~:1:-.::=-=.=~:-=.::.-==::::~-=--=-r:':.::1 - _..-_-l .._.__.__....:_.1 _ .....:__ _..- -j - . --'.i"·-,-. -_.-..~.~... • • - •oj.•--.;..+-:.-; .••_."I.-'t •. 'I .. ..._.~--'j _.--.------......-.'..,.-------'n:.:~\\\IO.f"T LO\.-...- ----_._~--.--..:-_.~~-'-..'-.....--~-~--~~-'--I~'OI'~rLi :-~~lli~~~g~~=-~x~~s~=- 0/2.- ...J W> ~~IO- <wrn z<~~t8- w>o tIl<~~D([­ wwu.. ..i ..~--, ·f - ~--' ----1.--.--- -~---- I :.i __..-_.. ---'-j --_.- RIVER MILE SUSITNA HYDROELECTRIC PROJECT STAGE DISCHARGE CURVE .-..--.;.~- .:.-~ j .; '!-- .:..-~;-:-.T:: ,-/,., ':--~1-...:.-:1_-=~i .'=-=~T"'--..,....------'--v-...:I •~-:....,...-..:.-:-....:.--_._.:.~---.._~-_....:....--'r---- .._---.! ,--~--.._-'-..~--._._.-4--.---.-~-i ~o2 z o (f\tj ~\oUI<> W ...J W Io I 10,000 20,000 I 30,000 I 40,000 I 50,000 60,000 DISCHARGE,CUBIC FEET PER SECOND HARZA EBASCO JOINT VENTURE OCT 1983 :"d"~~"..-,..----- "~ ..J W> ~(oq'Z: <w (f) z< W L.'iD-~ W>om<~l.~- W W LL...zot=(a%tD- <> W ..J W -.-..-...,.-l . . ...0':..- , --_~.--~..-..;.......-_.-;....--...-..:-.._~.........---..~.-...~. -_•..•;_..••.....J ••.••_ -•....~.••••i ..._...1._.--1 .._.-~-__._ ..._ _.._ J ••.•......•._..__•.. _..._ B:::~~~r :~~~~~-~37.~~~-~~-::::+~:-~} ·~':.=.j ~:~:::.~~.:11:=:'·:~·~~:::.:t ~·:_~~~~~~.~":r.£~~~_~v:~,,,y~~..:~-=. .·---1·.... _..¥/.'-:.~~..l.---+_.~~.-_.._..:~_..---- •1·;;s=_._.- -==_.',..~~~'I'.'--:1:_=~:.:::::..~:.-:~-]:~-e:~~~.I/~J),::'-1;~~~~~'?~~:~~.~ • •t ••••I I ;---.,...,.~.~. - . t ~-~-._.--:.--t.--..•... -.....•...-_.....-...-..,.•._--- - -...1 ."":"~•~...~-.....- ---_.....,.---. o ·::::.:-::).-..:::.1:::.:::-~::i:-: ...-_..,.....---~......--_........_,..,_... _._-_......._...,.:-._..-+-._-_.-'-'~~----_._.-+-.__.--'+;._._.,.--'... . - :V·. -.-~~::J :-.::.=...--l..!- . .:-.::~_:;.~......_~~-~:·:..s ~::-= '--'.._.···,··i _:-_._..+--_. SUSITNA HYDROELECTR1C PROJECT STAGE DISCHARGE CURVE lSCi -4S RIVER MILE I ~~.!DCO 60,000 DISCHARGE.CUBIC FEET PER SECOND HARZA EBASCO JOINT VENTURE OCT 1983 ..zo~75L - 4( > W ...J W STAGE DISCHARGE CURVE SUSITNA HYDROELECTR1C PROJECT 60,000 /42.? I 50,000 .. I -40,000 RIVER MILE I 30,000 -;~~-t--;~-....::1 .-... 20,000 ~~.~:!:j ~_J -.....-:.......~, I 10,000 ~.•.....i la 74iJJ DISCHARGE.CUBIC FEET PER SECOND HARZA EBASCO JOINT VENTURE OCT 1983