<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 />
|