【摘要】 针对混合井的数值模拟一直为地下水数值模拟中的难题,通过非均质承压含水层的数值试验,对比分析了各种刻画混合井方法的效果,并提出考虑垂直水力梯度影响的改进导水系数—水力梯度法。结果表明,与导水系数权重分配法相比,采用导水系数—水力梯度法计算,导水系数较大的含水层分配的流量偏大,而采用Thiem模型法偏小;网格步长对抽(注)水井的模拟结果的影响大于对观测孔的影响。更多还原

【Abstract】 Numerical simulation of multiaquifer wells has been always a complex problem in numerical simulation of groundwater.This paper summarizes various methods which characterize multiaquifer wells and analyzes the effect of various methods through the numerical experiments in heterogeneous artesian aquifer.In addition,considering the impact of the vertical hydraulic gradient,an improved water conductivity coefficient gradient method is presented.The results show that the discharge of the relative large transmissivity aquifer is big with water conductivity coefficient hydraulic gradient method,while it’s small with Thiem model method,compared with weighted transsmissivity allocation method.The effect of grid step size on the simulation results of pumping(injecting) well is greater than those of the observation well.更多还原