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<br />. <br /> <br />. <br /> <br />. <br /> <br />\)'959 <br />~ with regression techniques for a large number of wells that are uniformly distributed throughout the <br /> <br />study area. A more detailed examination of the hydrographs indicates: <br /> <br />. Water levels in wells near the Arkansas River are relatively close to the land surface. <br /> <br /> <br />. Wells near the Arkansas River have relatively flat hydrographs compared to upland <br /> <br /> <br />wells but may have short-term increases of between 5 and 10 feet. <br /> <br /> <br />. In general, upland wells have hydrographs that are similar to each other. <br /> <br /> <br />. Water levels in upland wells may be as little as about 10 feet to as much as about 30 <br /> <br />/', <br />feet from the land surface. " <br />/ ""-. <br />. Periods of decrease exist in the records for upland wells but are abse!lt;jtl~ss' <>, <br />, C," /', "Vi' "F'~-- ""\.', <br />./ "<c/' / -- --~-'4 '; <br />pronounced in records for wells near the Arkansas River. v/'. "", < ..."~,~\~.. /' <br />:: "'~.,,~~ ') ! /-'-". \ '~- '> <br />. Relatively sharp periods of increase also exist in the records for l11e'lJpl1lllg,v.lells. ) ) v <br />,/-, \\ { ," ""\ ""'~, n" / <br />/ J " '" ""\ f <br />Historical water levels also indicated that the average fluC.t~~t!~p)JQt~r6~1ft~:l!.~~evels was <br /> <br />/ "", \. /'^''' ",], <br />. . / ,rn", \'\ '> -.' ~---,..,:~_/ / <br />about 6 feet and that the largest fluctual10ns occurred In uplan\!. ,ells.\Alt~"g~~ere.are some records <br />~\_ \./ ,J /"~_ \, \ ,,> <br />/'\. './' 1;.. __ "'-'"\ '- v <br />in which water levels have been measured on a time ~leQ\a~ short ii~<,~;ek,:tv\ historical water-level <br />~- _'''. ", Z \j /' _-~ <br /> <br />data, in general, do not describe short-term Ch~~~~~~~,l;l)l~~(15~~~).f.;~ places where reversals in <br /> <br />water-level gradients have occurred can be id~'\tlftedl-'ihehi~tori'eatwater-IeveI data generally do not <br />/"'\ \ " .i'u,/, /" "" <br />\_\,'~ '. ( - l' \ <br />have sufftcient resolution to address\~~.lt~'\')Jn~p6~,.\.....j <br />'-\\"" ',- -, -,,/"\ "-,- <br />Several hydrologic fact?r~,~~,\ ;~ter Iev'eIs>can be identifted. They include losses from <br />" -'."'" ,,;: <br />surface-water conveyanc:es";s~{I~1;;W:ate~li~;lmations for irrigation, ground-water withdrawals, and <br />{'-"" \_-")~ / /~-/., "',/ <br />,/<>, //)i" ,( ~ \ <br />changes in the rive~"b. Jj6!l/M~?f.theje factors indicated temporal changes in the study area. The <br />/'-"-:\~\~- /.^ ~~~- <>~-::-;;j~, "./ <br />Fort Lyon Ca!laJ.:aj'1dt~e.Arkitn,S~";!~iy.er generally conveyed larger amounts of water after about 1980 <br />'~ " ,--', } < "",/ <br />'''-~-->-_ _ \,. "" ,f','-'-" ,n:"" ,I <br />than before 'th1t\iin( ~~Q~4:~~ter withdrawals and surface-water applications have generally <br />"",,:,'> .1'- \",\_--~~>_ t'j>/ <br />decreased althoug/l"sl!dac'e'=water applications, much like surface-water conveyances, did increase <br />,,'_.,-)' ""- -"/,/ <br /> <br />noticeably intb.e.I:9~b's. <br />Some simple interrelations, mostly on the basis of coincidence of change, between hydrologic <br /> <br />factors can be described: <br /> <br />21 <br />