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对于大型的地下水取水源地的水资源评价,需全面考虑含水层的补给、迳流与排泄条件及地下水的动态特点,最后给出地下水开采期的水量或水位动态变化预测值。在这种情况下,用数值法评价地下水量较其它方法更合理些、可靠些、这是因为数值法计算有如下许多优点:(1)它是以区域水均衡为出发点建立数学模型的,它能够考虑全区地下水均衡的各种补、排条件,因此计算结
For large-scale evaluation of water resources in groundwater sources, the recharge of aquifer, tundish and drainage conditions and the dynamic characteristics of groundwater should be fully considered. Finally, the predicted value of the dynamic change of water quantity or water level during the exploitation of groundwater is given. In this case, it is more reasonable and reliable to use numerical method to evaluate groundwater quantity than other methods. This is because the numerical method has many advantages as follows: (1) It is a mathematical model based on regional water balance To consider the region’s groundwater balance of a variety of fill, row conditions, so calculate knot