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<br />~ONTENTS
<br />Q)
<br />00
<br />Abstracl ......, ............ '........ '.. ...."", ,.. ,...." ....'.."..,.. '....,...."..,..'....',..'" ....,.. '.... '........,..,...... ,.. ....' ,..........,.... ,.... ....' '.... ....,.... ....' 1
<br />Introduct ion.. .... .......". ,.. ....... ........"... ,"."... ..... _. ,..",.. "........".. ,_.... ...... ,". _... ..... ........ ........"... ....... ..... .............".. .......0 ,_ ..... ......... "..." I
<br />Purpnse and scope....,..,...."..,....,.. ....'.. ....,..'......,.."..,..'........"..,..,.. '.... ..............,.... ....,.., ......,....,.... ..'....,.. '.." ....'......,.. I
<br />Aclrnnwledgments .............. ............ ............ ........................ ....,............ '.. ...... .......... ...., .......... ............ ........ ,............ ...., )
<br />En v iron menIal selli ng .... ..'......,.." ....,..,.. ...., ......,....,....'""..,..,........, ......,.. '.... '..,'..,......,......' ...., ......, ....' ............" '.... ....'.. ....,.. 3
<br />Physiography,...., ......,....,.... ..,..,.. ......"........ '.... ....'....'",........'..,...... '..', '.. ......'" ....' ....,...., ......,..... ,..,.......,.. '.... ....'.. ,...... )
<br />CI imale ..,......,....' ......,....,.." ....,..,.. ...., ....,......,...."",..'....,......'..,......'.." '.. ......'....,.... ....,..,......, ....,.. ...., ....,.. ....'.. ..'.. ,...... )
<br />General geology ..,....,....,..".....'........'"..'"..'......"", ,.."'...."..'..,.."..'.."..,......,,, ..,.... ....,.........,..... ......, ....,.. ....'.. ..,......,.. )
<br />General soi Is ,..,..,....'"....,.... ....,..,......,..,.."..'.."..,.."..""........'....'",,'....'.. ......'....,......",..'......,....,......, ....,,'....,.. ....' ....,.. 9
<br />Eeoreginns.."..,..,.... ....,..,.... ,......, ......,..,.."....,....,.."..",..",....,....'"..'....'.. ......'.. ....,.. ,.. ....'"....,....,......, ....,......'.. ....,....,.. II
<br />Populalion ..,......,....'""..,.., ,....,..,......,..,.."....,......."..",.."",..'....",..'....'........'.. ....,....'.... ....'..,....,......, ....",....' ....'.. ....,.. II
<br />Land use ..,.. ,......,....,.. ......, .........,......,..,.."...."'..'""..,....",....,....,......",'........",, ,..,..,.. ....'.... '......,....,......,......,....'....,.... 14
<br />Waler managemenl", ,....,....,..".., ,...."..,.."....",...""..",..",....,....",..'....'........'..'...... ,......,......,....,....,.. ....,.. ....'....'".. ,.." 14
<br />Waler use .... ............' ......,....,...., ........,....'".. '.......', ....'"'...."..'....',,,'..,.. '........,..'...... ,......,......,....,....,.. ....", ....'....'"....,.. 14
<br />Hydrologic characteri" ics..,......",....,.. ,........, ....'""..,....",....,....,......,..,........""......,......'......,.. ....'..,.... ,.."....,....,......,.. I 8
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<br />Surlace waler ..,...."'..,..,,, ......,.... ,........,,'..,,'....,....,.. ....'....'.."..,....,.... ,...., ,..,..,......,.. ....,.. ....'..,......", ....,....",.. ..,.. I 8
<br />Annual and monlhly flow oh8raclcrislies..",....""...."..,....,......""......,......,......,......'..,....,..,..,..,..,.."....,.. 20
<br />Floods and droughls.., ...., ,........"'.."'....,,,..,,, ......,..' "....,.... ....,..,.. ....,....,...." ,..'.." ....'..,......", ....'....,......,.. 20
<br />Human elTcets nn streamftow,..,....,......,....,..,...."..,.."..""".........,......,......,......,......,....,....,......'....,......,.. 20
<br />Ground water,....","....""...... ...., ,..".. '......"'....,,,..,.. ......,..",,'..,.., ......,....' ...... ,......,......'",........ ....',.. ....'....'......,.. 24
<br />U ncnnsol idaled aq u i rers....,......,....,......,..,.." ....'"..'......,..'...."..,..' ........'....,......,.. ....'"..'....,.... ......".."..,.. 24
<br />Bedrock aqui fers ,'...... ,.... ,....,........','....,....", ....'....,......,....,....,.." ....,....'"..",....,.. ....'"..' ....,......'....'.."..,.. 26
<br />Water movement ,'...... ,.." ,........,....,......,....", ....' ......,....,....,.... ....' ........"....'......,..'...."..' ......'..,.. ......'....,.. 26
<br />Slream-aq ui fer rei at ions ,.........",..',....,....,.."..'"..",....,.. ....,.. '......,....,......",....,....'"" '......,.. ....,.. ....'....,.. ..,......,.. 26
<br />Aq ual i 0 binlogical characleri sl ies ...."""......,....,.."..'"..",....,.. ....,.. ..,....'"" ,......,......,...."",'........' ....'.. ....'",.... ....,....,.. 26
<br />Implicalions nr envirnnmental selting nn water qualily '....'....,....,......'........'.."'....'....,......'"..'"..'..........,..'......,,,..'.............. 28
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<br />Nalural faclors,..,.." ....,..,.."..'....,......,..,.." ....,....,.."..'..,........,.. ,......",....,.."..,...."", ,.... ...., ................'", ........'..','.. ....,.. 28
<br />Human raclorS,..,......", '...."..'....,......, '....',....", ....'",......,.."..,..,......'"....,.."..,....,..', ...., ....,.. ....'..,....,....'.... ....'..,...... ...., 29
<br />SUllullary ....,....,.... ,.... ....", ..............'....,......,..,.... ....'" ,....",....,........,..,........,....,......,....,..",....,.... ..,......,.... ....,.., ......,....'......,.. 3 I
<br />References ci led,.. ...., ....,.. ,......,...."'....,......,..,..,, ....", ,....",......,.."..,..,........,....,......",..,..",....,.... ......, ,...." ,...... ,......'....'..','.... 3\
<br />
<br />FIGURES
<br />
<br />1-9, Maps showing:
<br />\, Location of the Upper Coloradn River Basin study unil, physiographic provinces, major streams,
<br />and selet:ted sur face-water Slat ions. ............ ..,.. ..,..".........." ..............."... ..... ........"........." ....... n. ,_.. .,_ ......... "..." 2
<br />2, Average annual precipitalion (1951-80) in tile Upper Colorado River Basin sludy uni1...........,.............., 4
<br />), Generalized bedrock geology of Ihe Upper Colmado River Basin study unil ..........................,..............., 6
<br />4, Major leclonic fealures of Ihe Upper Colorado River Basin study unil........................,............,.............., 8
<br />5, Soil associalions in Ihe Upper Coloradn River Basin sludy unil..............................,................,..,............, 9
<br />6, Ecoregions of Ihe Upper Colorado River Basin study unit ..................,...................................................., 12
<br />7, Populalion densily in Ihe Upper Cnloradn River Basin study unil.....,..............,....,......,..................,........, IJ
<br />8, Major land use in Ihe Upper Coloradn River Basin study uni1...........,.............................................,........, 15
<br />9. Major interbasin water transfers. \'V'a!cr diversions, reservoirs, anu municipal discharges in the
<br />Upper Colorado River Ba,in sludy unil.............,..............,............,............................,................,....,....'.... 16
<br />10-12, Graphs showing:
<br />10, Mean annual streanlflnw at selected ,urface-waler 'laliol1' in the Upper Colorado River Ba,in
<br />
<br />,t udy uni t ..', ,........",'...... ,.."..,.. ....", ,....", ,..,..,..".......,......",'.. ......,..' ......,.. ..,.... ...., ,.."......, ....,..',.., ....'.. ..'.... 2 I
<br />II, Mean monthly streamflow at ,eleeled ,urlace-waler stalions in Ihe Upper Colorado River Basin
<br />sl udy uni 1 ....,........",'...."..... ,..',...." ..........,....,......,...."", '......'"" ,.."..,...... ........ ......'..,......,....,......", ....,....,.. 22
<br />12, Streamflow probability ofexceedance and nonexceedancc al ,eleeled ,urface-water stations in the
<br />Upper Colorado River Basin study unil,..,....,.."..""......"..,..,..",......,.."..",..,......,..",........,..,......,....",..,.... 2)
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<br />CONTENTS V
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