Analysis and Calculation of Critical Rainfall for Waterlogging Disaster Based on Inverse Distance Weighting Method
In order to classify the risk level of waterlogging disaster in areas with insufficient monitoring data and enhance the early warning system of waterlogging risk,this study obtained critical rainfall values in the danger-hidden points by drawing on critical rainfall calculation model of mountain torrents.Taking Manzhouli as an example,we adopted a combination of single station critical rainfall method and inverse distance weighting method to calculate and analyze the existing rainfall monitoring data from meteorological station networks,waterlogging depth during the rainfall process,hourly rainfall,and geographical information of waterlogging danger-hidden points.Our findings assert that the critical disaster-causing rainfall values for 17 single stations under the four waterlogging warning levels are between 2.5 and 39.6 mm at seven automatic rainfall stations,including the Mutual Trade zone and the base station.At the 23 danger-hidden points in front of the Taowa Square on the Huabu Street,there are 92 critical rainfall values under the four waterlogging warning levels,varying from 4.30 to 29.11 mm.Applying these critical rainfall values to waterlogging risk warning has achieved good effects.
NETL
NSTL
万方数据
