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Percentage change in saturated thickness of the High Plains Aquifer, west-central Kansas, 1950 to average 1984-86

Water-Resources Investigations Report 86-4365

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Abstract

Continuing studies are being made in west-central Kansas to provide up-to-date information that will aid in the management of groundwater for irrigation. The results are presented of the sixth in a series of studies that used a statistical technique called kriging, to produce hydrologic maps. The kriging technique interpolates water level altitudes at the center of each 1 sq mi section in the study area on the basis of water level measurements from 169 observation wells. For this study, measurements made at each site during the winter months of 1984, 1985, and 1986 were averaged. These interpolated altitudes (1 ,859 in all), along with bedrock-surface and base yr water level altitudes, were used to prepare a hydrologic map that illustrates percentage change in saturated thickness. Saturated thickness is the thickness of the High Plains aquifer between the groundwater surface, as indicated by water level altitudes, and the bedrock surface. Because irrigation development in west-central Kansas was minimal prior to 1950, the saturated thickness during 1950 represented a nearly static condition in the aquifer. Thus, the decrease in saturated thickness of the aquifer since 1950 is related to the effects of irrigation withdrawals on the volume of water in storage. (Lantz-PTT)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Percentage change in saturated thickness of the High Plains Aquifer, west-central Kansas, 1950 to average 1984-86
Series title:
Water-Resources Investigations Report
Series number:
86-4365
Edition:
-
Year Published:
1986
Language:
ENGLISH
Description:
1 map : photocopy ; 93 x 139 cm., folded in envelope 33 x 26 cm