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我们统计了170余次单孔抽水资料,研究表明,利用以稳定流为基础的裘布依公式计算含水层的渗透系数,能够客观反映实际情况的只占31.2%,其余的不是偏大(占18.5%)就是偏小(占50.3%)。在非均质地层中进行群孔抽水,由于观测孔或观测线的数量和位置不同,所反映的结果也不同。若利用缺乏代表性的观测资料计算渗透系数,必然带有局限性。近年来我们运用以非稳定流为基础的压力恢复曲线方法对以前的抽水资料进行了详细研究,並在实践中作了验证,初步认为,这一方法对论证大面积上的疏干求取平均渗透系数,
We have collected more than 170 single-hole pumping data. The study shows that using the method of stable flow-based Qiubu formula to calculate the permeability coefficient of aquifers can reflect only the actual situation of the actual 31.2%, the rest is not too large (18.5 %) Is smaller (50.3%). Group hole pumping in heterogeneous formations results in different results depending on the number and location of observation holes or observation lines. If we use the lack of representative observational data to calculate the permeability coefficient, we must have some limitations. In recent years, we used the pressure recovery curve method based on unsteady flow to study the previous pumping data in detail and verified it in practice. It is preliminarily believed that this method averages the dewatering on a large area Permeability coefficient,