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Last modified
7/28/2009 10:59:23 PM
Creation date
10/12/2006 4:24:42 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8041
Description
208 Clean Water Grant
State
CO
Date
3/31/1983
Author
CWCB
Title
Final Report on the 208 Clean Water Grant for the Water Quality Control Division of the Colorado Department of Health
Water Supply Pro - Doc Type
Publication
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />3638 <br /> <br />TO: <br /> <br />Dan Law <br /> <br />FROM: <br /> <br />Deal1 SL.i.ndL <br /> <br />DATB: <br /> <br />AugusL 6, 1982 <br /> <br />SUBJECT: Sal.in,iLY ImpacLs of Colorado River Flow AugmenLaL,ion <br /> <br />The Co 101: ado River Enhanced SI10WpaCL Tes'L (CREST) program <br /> <br /> <br />was developed by 'Lhe Bureau of Reclamation as a measure for <br /> <br />augment.i.ng flows in Lhe ColOJ:i'\l'lo R,i veL-. 13asen 011 cloun seen'; ng <br /> <br />expeJ..".llOellLfi .i.n Lhe eolOt"ado H.i.vuJ.." Ilas.i.ra, t:.hc OU.ceau hils USL.iIlI.:.J.L(.?d <br /> <br /> <br />that about 1.3 maf (million acre- feet.) of water peL' year could be <br /> <br /> <br />added La t.ne Flasil1' s wat.eL- supply t.hrough lmplemel1tat.,;,on of a <br /> <br />basin-wide weather modi f,icatiol1 program. <br /> <br />The precise impact. Lhls add,it.ional high qualit.y wate,,' would <br />have 011 salir,lt.y levels in the Colorado River at Imperial Dam is <br />not. known. The Bureau of Reclamation and Colorado River Board of <br />Cal.iforl1ia offer significantly different est.lmat.es concerning <br />pot.ent.ial saliniLY impact.s aL Imperial Dam. <br /> <br />In making their projection, t.he Bureau assumed that. fut.ure <br />water demands in the Upper Basin would remain the same wit.h or <br />without. weather modificat,ion ar,d Lhat. most. of t.he additionally <br />generated water supply would be utilized or stored by the Lower <br />Basin. They also assumed virgil1 flows averaging 14 maf per <br />year. For t.he period 1991-2020, Lhe Bureau pcoject.ed an average <br />annual decrease in salir,ity at Imperlal Dam of about 91 mg/!. <br />This decrease is due LO Lhe increase in high quality wat.er which <br />would be available for dilution. <br /> <br />The Colorado River Floard of Cal,i fornia (Board) made some <br />differenL assumpt.ions regarding Lhe t.iming and what. is uILimat.ely <br />done wit.h the additional wat.ec supply. Based on st.udies made for <br />purposes oLher t.han Lne evaluat.ioTI of salinity impact.s of rivec <br /> <br />604 <br />m/sal/imp <br /> <br />-2- <br />
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