随着工业用水、生活用水的增加和水源污染、水土资源流失以及水资源浪费现象的加剧，国家地上水资源明显减少。合理利用地下水，合理选择井距确定打井数量是摆在国家经济发展面前的一大难题。%Along with the increase of the living water, industr-ial water and water pol ution, loss of water and soil resources and waste of water phenomenon aggravating, the national gro-und water resources decrease. Rational use of groundwater, the reasonable selection of well spacing and determines the numb-er of wel s is a great difficult problem in front of national econ-omic development.
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