含水层释水系数及贮水系数的初步研究

释水系数及贮水系数是含水层的重要水文地质参数之一。由于松软含水层是属于弹性、塑性体、除具有弹性释水性能外、还有塑性释水性质。往往塑性释水要大于弹性释水的几倍、几十倍,甚至几个数量级。而用抽水试验方法又只能求得弹性释水系数,无法确定塑性释水系数。为弥补此不足,作者根据土力学中饱水土的压缩理论,进行释水及贮水模拟试验建立起计算公式,并利用地下水动态长期观测资料,求得不同岩性含水层的弹性释水系数、塑性释水系数和贮水系数。为采用释水系数计算下降水位,用弹性贮水系数计算回升水位提供了可靠依据。从而提高了地下水位预测精度。

RESEARCH ON THE COEFFICIENTS OF WATER RELEASE AND STORAGE IN THE AQUIFER

Coefficients of water release and storage are very important parameters of the aquifer. There are both elastic and plastic properties in loose deposited aquifer. Usually, the plastic water release is several times or evenseveral dozen times bigger than the elastictic water release. We can only evaluate the coefficient of elastic water release by using the pumping test.In order to get the coefficient of plastic water release, based on the compression theory of soil mechanics in saturated soil zone, this paper has built the calculation formulas from the simulation test of water release and storage.Finally, the calculation steps and method have been discribed, and the coefficients of elastic and plastic water release and storage coefficient of various rocks were achieved.This paper laid the foundation of calculating the declined water level by using water release coefficient and calculating the recovery water level by using storage coefficient, therefore, it promoted the accuracy of ground water level predication.