一、问题的提出在农田供水水文地质勘察工作中,有时采用一个钻孔了解两个相距不远而又互无水力联系的含水层的涌水量,为减少钻孔止水的麻烦,缩短施工周期,在上含水层抽水之后,继续钻进揭穿下含水层再混合抽水,由于种种原因,混合抽水的动水位均未降至低水位以下,致使混合抽水试验的Q～S曲线反常。这种情况下,如何确定下含水层的涌水量呢?二、混合抽水试验的计算原理1.混合抽水的动水位未降至低水位以下 First, the issue put forward In the hydro-geological survey of farmland water supply, sometimes using a drill to understand the two not far from each other without water contact with the water of the influx, in order to reduce the trouble of drilling water stop, shorten the construction cycle After the pumping of the upper aquifer, drilling continued to expose the lower aquifer and mixed pumping. Due to various reasons, the dynamic water level of the mixed pumping did not drop below the low water level, causing the QS curve of the mixed pumping test to be abnormal. In this case, how to determine the inflow of water under the aquifer? Second, the principle of mixed pumping test calculation 1. The dynamic pumping water level did not drop below the low water level