Laserfiche WebLink
� <br />DISCUSSI�N <br />• During the wintex of 1992/93, b18 wells were measured in the Northern High Plains <br />Designated Basin. An attempt was made to measure all the wells within a four week period <br />begiiuLing approximately January 1, 1992. This goal was not achieved due to heavy snows in the <br />southern part of the basin. All wells were measwred prior to the end of February. By measuring <br />the wells in a short rime period, it is hoped that seasonal fluctuations will be dampened and that <br />the hydrographs and comparison of water level change will more accurately reflect the true ground <br />� water conditions. The four hydrographs for wells with continuous recorders show that the aquifer <br />receives recharge up to the beginnuig of the irrigation season and that measuring the wells at the <br />same time each yeaz is critical to obtaining consistent data. Although the measurement period was <br />slighdy extended this year, it is believed that the data is representative and can be correlated with <br />previous data. <br />� T'hroughout the Northern High Plains, the water levels continue to show the regional decline <br />which is to be expected when water is being "mined". There are localized areas neaz the basin <br />margins and in area where water use has been curtailed which show rising water leveLs. The maps <br />contained u► the appendices show the relative change in water levels since last year and for the <br />previous two years. A map showing the overall change �or the perivd of 1965 to 1989 was included <br />� in the 199� report. A map showing the five year water level trend (1988-1993} is included in this <br />report. <br />The average rate of decline for the past year is less than that for the preceding year (U.34 <br />feet during 1992 as compared with 0.5I feet ,in 1991). The well hydrographs contained in <br />Appendix L show representative water level trends in areas throughout the basin. <br />� <br />DEPLETI�N STUDY <br />In 199D, George Van5lyke and Steven Joliat of the State Enginee�s �ffice prepazed a <br />� comprehensive report for the Northern High Plains (Depletion to the Ogallala Aquifer, Northern <br />High Plains Designated Ground Water Basin, August, 199oj which details the depletion to the <br />�gallala Aquifer from I9b5 to 1989. The results of this study were presented to the Colorado <br />Ground Water Commission at the August 1990 meeting in Colorado Springs. Copies of this report <br />can be obtained from the �ffice of the State Engineer for a cost of $20.��. <br />� <br />� <br />� <br />� <br />