Relationship between Hail Distribution and Topographic Factors Based on GIS in Sichuan
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Abstract:
Based on the data of the Digital Elevation Model (DEM) of Sichuan and hail observation of 45 years (1970-2014) from 143 weather stations in Sichuan Province, using such methods as correlation analysis, stepwise regression, digital terrain analysis and zonal statistics, the research is carried out on the relationship between hail distribution and elevation, slope, aspect, longitude, latitude, relief, and terrain cutting depth over Sichuan Province. The results show that the characteristic of hail distribution in Sichuan Province is obviously geographical—the main influencing factors of hail distribution are elevation, longitude, relief, and slope direction (northwest to west). The regression equation simulating the spatial distribution of hail is also established, and the conclusion shows the consistency of simulated values with actual data, though the simulated values are overall smaller.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.