井水位阶变与含水层所受体应力之间的定量关系

QUANTITATIVE RELATIONSHIP BETWEEN THE STEP VARIATION IN WELL WATER LEVEL AND THE BULK STRESS IN THE AQUIFER

分析了井水位阶变与含水层所受的应力、水井含水层气压系数、体应变固体潮系数之间的定量关系．井水位阶变愈大，水井含水层气压系数愈大，体应变固体潮系数愈小，则含水层的应力变化愈大．给出了利用井水位阶变，通过承压井潮汐理论反演含水层应力变化的方法，讨论了这些方法的可行性．并以日本秋田７．７级地震引起中国井水位变化为例，估算了震时引起中国应力场的调整变化．

In this paper, the quantitative relationship between the step variation in well water level,the bulk stress in the aquifer and barometric coefficient and coefficient of bulk strain tide of well aquifer are analysed. The larger the step variation in well water level and the barometric coefficient of well equifer, and the smaller the coefficient of bulk strain tide,the greater is the stress variation in the eqtuifers.The methods of inversion of stress variation in the aquifers using tidal theory of the pressure well,the effect of barometric pressure and earth tide of well, by means of the step variation in well water level are given. The feasibility and advantages of these methods are discussed.As and example that the variation of water level of wells in China is caused at the time of the Akita earthquake(Ms 7.7) in Japan, the adjustment variation of co-seismic stress field in China is calculated.