地貌瞬时单位线在滦河中小流域的应用

针对中小流域防洪能力薄弱、水文资料缺乏、洪水预报预警难度大的问题,选取滦河两个中小流域,分别采用经验公式法和地形地貌参数法确定流域平均汇流速度,推求相应的地貌瞬时单位线,采用清华大学GBHM产流模型,对该地区2017、2018年暴雨洪水进行模拟分析。结果表明,经验公式法推求的瞬时地貌瞬时单位线模拟精度较高,应用效果较好,可推广应用于无资料中小水库洪水预警预报工作中。

Application of RV-GIUH Model in Medium and Small Watershed of Luanhe River

Food control ability of small and medium-sized river basin is unsubstantial because of lack of hydrologic data and difficulty of flood forecasting. In this paper, choosing two small watershed in the Luanhe River, empirical formula method and topography parameters method were used to determine the watershed average flow velocity and derive the corresponding RV-GIUH. And then the summer floods in 2017 and 2018 were simulated by the GBHM runoff model. The results show that the geomorphologic instantaneous unit hydrograph obtained by empirical formula method has higher simulation precision and good effect. So, it can be applied to flood early warning and forecasting in ungaged small and medium-sized reservoir.