Geographical Division of Rainstorm Disaster-Inducing Environment in Hebei Province Based on Hazard-Affected Houses
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Abstract:
Based on the cases of rainstorms and flood disasters in Hebei Province from 1984 to 2014, the spatial and temporal distribution characteristics of damaged houses caused by rainstorms are analyzed. Taking houses as the disaster-bearing body, geographical elements such as land use type, topography and residential area are selected as zoning indicators. The disaster-inducing environment of rainstorm disasters in Hebei Province is divided based on the K-means clustering analysis method. The results show that the change in house losses caused by rainstorms from 1984 to 2014 is basically consistent with the total five-day precipitation. The frequency of damages to houses is generally higher in the north and fewer in the south. Among the environmental factors related to land use type, grassland is mainly distributed in Taihang-Yanshan Mountains, and woodland is mainly in Chengde, Southeast Zhangjiakou, Western Baoding and Shijiazhuang. The proportion of agricultural land in the southeast plain is above 0.8. The water range in the eastern coastal area, Zhangbei, Guyuan, and western Daqing River, account for a larger proportion. The topography of the northern plateau and Taihang Yanshan Mountains undulates greatly, and the regional standard deviation is more than 100 m. The density of residential areas increases gradually from northwest to southeast. In the plain, there are dense residential areas near the urban districts. Area Ⅰ is the coastal plain area, which is easily affected by strong precipitation. Area Ⅱ is the piedmont plain area. Its grassland and woodland increase. The proportion of agricultural land in Area Ⅳ (low mountain area in the West) is larger than that in Area Ⅲ (high mountain area in the north). Area Ⅴ is the inland plain area with less precipitation.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.