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<br />t_, ~, ) . l' ' ~ <br /> <br /> <br />The difference between precipitation and runoff indicates the portion which <br />evaporates from ground and water surfaces~ goes into groundwater storage, <br />and is used by plants and trees. The portion used by the latter in <br />transpiration, and the evaporation from plant surfaces, the ground and <br />water surfaces, accounts for the major portio~s of precipitation and makes <br />possible the agricultural production which is of major importance to the <br />Missouri Basin. <br /> <br />GROUNDHATER <br /> <br />For the most part, groundwater supplies are used for all purposes <br />throughout the basin. The follO\.ing map indicates a large aquifer under- <br />lying Nebraska and parts of Kansas, with rather substantial areas of <br />aquifers scattered throughout the basin. These provide a good source of <br />water. There are a fe,,, areas in the basin where extensive use of ground <br />water has, in recent years, resulted in some lowering of the water table <br />and there are a few areas where the water table has been rising. The <br />extensive recent development of ground water as a source of water supply <br />raises the question of the adequacy in limited localities. <br /> <br />13 <br /> <br />