地下水非稳定理论应用中若干问题探讨

DISCUSSION ABOUT THE APPLICATION OF GROUNDWATER UNSTEADY FLOW THEORY

地下水的缓慢流动使得对井群开采的场激发产生迟滞响应,从而具有类似“地下水库”的调蓄能力和漫长的非稳定流调蓄周期.这种调蓄能力是地下水本身固有的,在不同的阶段又具有不同的特点,地下水的调蓄作用与调节作用是不同的两个概念.井群开采产生的非稳定流过程可分为3个阶段,此过程中的开采量(或允许开采量)主要是由动用储存量和排泄减少量组成的,地下水补排始终处于“负均衡”状态,地下水水位将持续下降.以此为论点,笔者对地下水勘察中存在的问题、稳定流应用中造成的片面认识及在非稳定流理论应用中的理解进行了较深刻的分析.

The slow-moving of the groundwater causes sluggish response of the field excitation to well cluster exploitation, so the aquifer has accommodation like a underground reservoir', store capacity and longtime adjusting cycle of unsteady flow. The adjustment ability of groundwater varied in different stage. Process of producing unsteady flow in well cluster extraction can be divided into three stage, during this process produced quantity is composed of the storage and the decrease that excretion quantity. Under these circumstances, the groundwater of replenishment and drain consistently is in a state of 'negative balanced' and the water level will continuously descend. Based on this view, this paper discussed the problems in groundwater exploration and corrected unilateral knowledge to application of unsteady flow theory.