小流域山洪灾害预警指标计算方法应用研究

Study on Calculation Method of Early Warning Index of Flood Disaster in Small Watershed

文中以匡门沟流域为例,在对该流域降雨、洪水等资料进行统计分析的基础上,选取推理公式法和地区经验公式法对山洪灾害预警指标进行计算。为了检验方法的适用性,选取1996年和2016年暴雨洪水资料进行分析,确定该流域山洪灾害预警指标计算方法,并推导出一套适用于该流域雨量预警的公式,利用该公式可以对山洪灾害进行实时滚动预报,以减少山洪灾害所造成的损失。该方法对临近无资料流域具有一定的借鉴意义。

Based on the statistical analysis of rainfall and flood data in Kuangmengou watershed, this paper chooses the rational formula method and the local experience formula method to calculate the warning index of the flood disaster. In order to test the applicability of the method, it analyzes the rainstorm flood data from 1996 to 2016, determines the calculation method of flood disaster warning index, and deduces a set of formulas suitable for the basin rainfall warning. The formulas can be adopted to achieve the real-time rolling disaster forecast, reduce the damage caused by mountain torrents. At the same time, the method has some referential significances for the nearby basin with no data.