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<br />a0194b>
<br />
<br />.
<br />
<br />increase at a rate much greater than the preceding decrease. Again the tendency far water-level increase
<br />
<br />is mast pronaunced in wells 2 and 3. Increases, punctuated by a decrease in 1982, cantinued ta abaut
<br />
<br />1985 when water levels in all three wells became relatively canstant until abaut 1989 'Or 1990. From
<br />
<br />abaut 1990, water levels in the wells began ta increase slawIy in a trend that cantinued far the
<br />
<br />remainder 'Of the periad 'Of recard.
<br />
<br />Regression Characterization
<br />
<br />.
<br />
<br />~' '*,
<br />,,<:;,/"'\,", /",
<br />(" >~''') "'<> ("" ~~":: ""
<br />General change in water levels thraugh time aIsa can be characteriz~d~witti' siinpIeJirn\.lIf(egr~s-
<br />'- , ',,,,,", ,j I <""~ '-\' ,
<br />'- '\^""- ~,v ! i "\ '\j
<br />sian. The results 'Of regressian analyses can be tabulated and are mare'Conv'ePteiil'fa(w~R-wrtJi than a
<br />,( <}/~~,,\,~~;,) /~::~:/:>>" ,",~~j
<br />large number 'Of hydrographs. Linear regressian techniques re)~t~,ii:~~!l,Je:qto'viJi~~~ )tb~ this study,
<br />\, '\< J j \ \ "" ",,::,,,,,J
<br />measured depths ta water) ta an independent variable (far-1his sfudY'~(irr@".1i1e 'results 'Of regressian
<br />h'~\ \ ~~<~/,,'~""~~~',__>
<br />analyses can be characterized with an equatian, whifh<~lu~e~ a teOit'des~r-i,bing the slape far a straight
<br />( <) f~:~~'~ v ~/(-) ~~~;:>/
<br />line. Far regressians 'Of depths ta water with ~ime",!t:.!I\~Slope ls,~e~tive, then the regressian equatian
<br />/\ \ \) ,:~;}p //~_ M___,,,~ "\/
<br />indicates a general decrease in depths t~w<!;te<~ifh''fin(eCA.'4~crease in depth ta water represents a net
<br />/\~\ ~~~::-:~:,~)-/ ~//(> \,",,""--</
<br />increase in water-level eIevatian. <'~\:::~:) </,<<....
<br />\,' ,~ " " ,
<br />", - ,\;<'- __""/" ~^:_ 'c/
<br />When using results fra~~),'r \~'e~rftl'i~iQn, characterizatian 'Of haw well regressian equatians
<br />, ""\\ '\;:"<>'-</'''~>/ \\\ ~)\',>
<br />~\_ ) ""-, ,7 ,_~,_' _ ,-,.
<br />represent the data is aJ'~tQjlQ~t~j;'F~r f1\~ pu(Boses 'Of this repart, the significance of the slape, repre-
<br /><' (,i:~> _:~~)// _//~>:,,~\,,~,~,,::j
<br />sented by a 'T-vaIue:i~ usMc ~f'"!1!6,!-!J~.olijle value 'Of the T-value is greater than 2.0 then it is significant;
<br />/: ",<:<\\// '\\, \~'< '\~/
<br />the significanc:~\b(t~esiop~'\lS'~{j,~~~ as the absalute value 'Of the T-vaIue becames less than 2.0.
<br />
<br />, ',,_ / '__'>, ,/ ,M_,_ )
<br />Regressian-eq~atip~sio~~i~d assaciated T-values are included in table 3. The regressian slapes indi-
<br />-', -" ,\'
<br />
<br />, - , '
<br />-,' -, '-, ", -
<br />cate that, far weUs:til~th~~e significant sIapes, mast 'Or abaut twa-thirds 'Of the sIapes indicate
<br />
<br />increasing groundCwater levels thraugh time.
<br />
<br />Mast 'Of wells that have increases in water levels alsa have recards that are representative 'Of the
<br />
<br />.
<br />
<br />periad being studied; that is, they span mast 'Of the study periad (abaut 1960 ta 1997). Alsa impartant ta
<br />
<br />note is that when the regression results are plotted an a map, wells increasing water levels are distrib-
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<br />7
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