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Perspective on the ESPA Ground Water Model Greg Sullivan, P.E. Spronk Water Engineers , Inc. 1

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~ ◄ ~ lr,o,1 ■ 1- Managemem At1ivitles Mana geme p 1 Goal, ~ ln!JVe Conjuncriw Mll,/lljgemem 11. ,-. ntll'; ld,nllly A ___ of Ground Waler f.\lM()fflWfl t Mi1naQffflf" fU '10,01> Ac l ilj"IINI a nd _ , Surfue Watar ro, •• arr f Sn. ke River 8u1n Rl."tJUU •up10_,..., Spt 11 '(J tJIV' \t~t~luSW n,,, • I - • u ..... ,, p I M •n• g•n c-ns and Supr.k'lu,,,,a .11 C01hC1~fl 0C R..-., . C Op1 lttlU.l hon .'JJ lt1.,..ft. Rf"<l1 h • Spil\, WPh GWlt1SW ot groun d woter - A nd (, u, r.w: e wtr..-r u• • $upj e'11Wf\l•f CtutttJc• art !i\, E.no.,r"'" I..OWtl '''t"""""W.NN ~•J••• D.tlv•r', Prac.hcn • srwi1ii ,- ,...,.."" ., U&M .M W '.W" E-• f._ko,lt "••At)CIR•vtw Yes l!:IIKllwnoH OI Act,., . ..... .-,wl,-o, ; Conm...,, Cl<>al • "'""""' -,- ' ,......,. E'l'•tuate: Usl'IQ 0.-,, Gto unOWM • '·"""" ~ ., . 4

► ~ I Ground Wa1er UH j I Surnce W1rc-r UH i IOV.'Ra nctiw Adn f:llll't\l.11! Oh l1ll11;)11 c .... ,,w,.....,,., .. , or Grounll wai.r ~'°-""'911 C, iit.11-~DM• 1011 Surface W~ler R,ghrs Sn•~• Rrver B.111111 :E;.:. l Puom, IMln\lnasu•tion ' Ol g1oun<1 w:110, 11,jhllo Ofptrftonti lo an<11u,1 "Wllll)t <IQll!lo •omCllffllil'.:illr Dik•~to v • ., Llltt0utii•Rd&i1 ► -- ' &dllc.,,_., .., ........... Stcw -lrom ewnr.v,. ..,..,.,.,u..,.. - ... lw'f ... ..,.,...,., ,w,~ 1o1o1,.,. ...... ' C>MNnw .. hfl1 e.,.,,,,ed Yet. S ho<IO(ION s11,Jdl•• c.-,,_,_,, - l.ftOflq •o~u.., , w fbl,t,....MJ "·~· o,,,_ t,,, Cu,tMi-.ttl u• I I ' No FIISJWS"llj>lf& c:.,,,_R_ ... ..._...IOf, =- 5

~ Estimated Steady-State Effects on Snake River Flows Resulting From Various Past and Potent ia l Future ESPA Activities IOWR / I WWRJ Analyses Using the ESPAM· (2004-2006) GW.SW Conv & Suppl S•pply\ ! CIIEP I Recharg•Ji~ !t All Reaches GWU.. Chg SW UH Drought Drought RKOVII'/ Above Blackfoot D II Blackfoot-Minidoka ; DI I Thousand Springs -8,000 -6,000 -4,000 -2,000 0 2 ,0 00 4,000 Snake River Effect (el s) ; depletions(•) I a~relions(+) " Sou= IDWR / IWWRI ana,ya,,s """'9 111e ESPA G<ound Waler Model as vanous ll!pOll5 and described ,i presen,ab0r6 trom 2004~2006 6