Analysis on responding ability of well-aquifer system to precursors

Recording number of precursors from fourteen observation wells in Shanxi, Hebei, Beijing and Jiangsu region is analyzed and percentage of recording number of precursors to total number of earthquakes during the statistic years is presented, The relationship between characteristic parameters of well-aquifer system and responding ability to precursors is analyzed by the expression of amplification factor of well-aquifer system induced by Cooper et al. The results indicate that responding ability of well-aquifer system to precursors is related to inherent period of well aquifer, that is to say, the greater the inherent period is, the stronger the ability of recording precursor is. Re sponding ability of well-aquifer system to precursors is also related to ratio of transrnissivity to square of radius of wells, and the greater the ratio is, the stronger the responding ability is.

两种井孔变径对水位影响试验的解释

井孔变径对井水位固体潮效应影响的试验有两种不同的结果：一种是影响很大，响应幅度与井径的平方成反比；另一种是影响不大。本文用两种模式解释了两种结果，认为这与水井含水层的渗透系数及含水体的大小有关，渗透系数及含水体越大，则井孔变径对井水位固体潮效应影响越大。这主要体现了并孔水柱压力水头与含水层内孔隙压平衡，所以与并径大小无关。当渗透系数与含水体很小时，主要体现了井孔内水量变化与含水层释放、吸收水量平衡。一般情况下是介于两者之间。

On the hydro－spectrum of deep wells and the response ability of well－aquifer system

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