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文章以桂林丫吉试验场为例,验证是否可以利用SWMM模型模拟以管道为主的岩溶峰丛洼地系统降雨径流过程。以洼地为单元,把研究区概化为由管道相连的6个次级汇水流域,选择Green-Amp入渗计算方法,同时考虑包气带裂隙水对管道的补给,运行SWMM模型计算出研究区管道总出口S31泉的流量曲线。结果显示:模拟流量变化过程与实测流量变化过程基本一致。说明该模型可以用来模拟岩溶峰丛洼地地区降雨径流过程。经验证,模拟时段内S31泉总量相对误差为19.1%。
Taking the Yaji test site in Guilin as an example, this paper verifies whether the SWMM model can be used to simulate the rainfall-runoff process in the pipeline-dominated peak cluster depression system. Taking the depression as a unit, the study area is generalized into six secondary catchment basins connected by pipelines. The calculation method of the Green-Amp infiltration is selected. At the same time, the supply of fissure water to the pipeline is considered, and the SWMM model is used to calculate the study District pipe outlet S31 spring total flow curve. The results show that: the simulated flow change process and the measured flow change process are basically the same. It shows that the model can be used to simulate the rainfall runoff in the karst peaks-depression area. It is verified that the relative error of S31 spring total is 19.1% during the simulation period.