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针对国际通用软件MODFLOW缺乏面状通量处理的缺陷,基于RCH子程序(RechargePackage),开发出可实现多层面状补给和排泄的子程序包PRD(Planar Recharge and DischargePackage)。应用PRD可以在模型的所有层位上进行面状补给或排泄处理,也可实现在同一层位的多次不同面状通量过程。该方法有效解决了降雨补给、农业开采和灌溉回归等不同源汇项的多层、多次叠加表达,避免了传统点井处理导致的开采量调配问题,为区域、流域尺度地下水数值模型提供了新的源汇项处理方法。该方法成功应用于北京平谷盆地的数值模型中,并取得了理想效果。
In order to overcome the limitation of MODFLOW, which is lack of planar flux processing, PRD (Planar Recharge and Discharge Package) is developed based on RCHP (RechargePackage) to realize multi-level planar replenishment and excretion. PRD can be used to planar replenish or excrete all layers of the model or to multiple different planar flux processes at the same level. The method effectively solves the multi-layer and multiple superimposed expressions of different sources and sinks, such as rainfall recharge, agricultural exploitation and irrigation return, avoids the problem of the allocation of extraction quantity caused by traditional point well treatment, and provides the numerical model of groundwater at regional and catchment scales New source and sink item processing method. The method is successfully applied to the numerical model of Beijing Pinggu Basin and has achieved the desired result.