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<br />.
<br />
<br />.
<br />
<br />.
<br />
<br />()Q1943
<br />
<br />the eastern one-half of the study area where the zone is, in general, a thin strip; however, there is an area
<br />
<br />in the eastern part of the study area, mostly in section 21 of township 23 south range 54 west, of the
<br />
<br />study area where relatively shallow depths to water are more extensive than a thin strip.
<br />
<br />During the assembly of digital representations of the geographic features in the study area, maps
<br />
<br />made at different times have different locations for the Arkansas River. These differing locations indi-
<br />
<br />cate the shifting nature of the river and also indicate that the river channel, on a scale of decades, is
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<br />/'<
<br />. .
<br />
<br />moving.
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<br />The USGS has monitored ground-water levels in the stpdY:~'(~ ~;v~~~:~(~d~~. Water-level
<br />~ ~-,jJ \ \ ", ,,~--~---
<br />records are maintained in a system known as the Gro~~~~ate;Sit::~~~l~tj~GWSI) data base. As
<br />
<br />part of the study, the GWSI data base was accessedt~p6tain~water~I~~t((e<:ords from wells in and
<br /></ <) d~"-'-_ ',' (,'/ _t,~~>,,//
<br />around the study area and information from ~bout.~~lls wll'S,~6;~'afued. A subset of these wells,
<br />_(\~\ \ _,/""~? J<::::::"-"'\ v
<br />which includes only wells that have ~~el!~~~IIl;,\~.~~one time, is listed in table 3. A brief
<br />< \~\.,,_ "\~~"__",,/ ,/' _ '" --'.__.",.'J
<br />summary of the information avail~b)~br:'\(.~ch w'ert'a!)o,is included in table 3.
<br />,-''',. '\ 'q> ,\,::\,> /"- '\/
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<br />. ,',,' <~:.~;~3~~:'{'~~)
<br />
<br />General Change$iR:'4!~tJr'~~,<els()
<br />'" -''-.- - ': >~/'- / <,~,,~ """~-" ,/
<br />
<br />HISTORICAL WATER LEVELS
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<br />_.^"'-~<'-"_\ <~,,-_/- /,,~\__---'><J'/'-\
<br />Some o(t'l.~;~?~~.usefUl~,~f~~)ltion available from the historical records concerns how water
<br />\"" t\ '. /,^""'\ ''\\!
<br />levels hav~ g~n,erillly ~hal)g\l(r~hr6hgh time. For instance, have they remained about the same or have
<br />
<br />"',', '", d,~
<br />they changed, ancWf'l)J6y '~ave changed, have the changes been steady or abrupt? A visual inspection of
<br />d, ' "
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<br />" ,"' ',"
<br />the records iticllc'llr~fthat, in most representative cases, ground-water levels have generally had a net
<br />
<br />increase during 1960 to 1997. Examples of these increases, for several wells, are shown in hydrographs
<br />
<br />as in figure 4.
<br />
<br />5
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