Disaster level and dangerous zone division in flood disaster along with river villages in hilly areas
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Abstract:
With the advancement of the prevention of flashflood disasters in the small watershed of the mountainous area，the local key areas ( villages and towns) along the river in hilly areas have become the focus of flash flood disasters. It is critical anddifficult to analyze and to calculate the risk of each village along the river, to determine the unified disaster water level, and to analyze the submersed number of people under different frequencies of floodwater line and the danger zone. This paper intro duced the analytical process of the flood control capacity of the village along the river to calculate the water level-river discharge relationship in the control section. Moreover, this study also put forward a feasible method of calculating the disaster water level and counting the number of people in the danger zone by point out the projection and judging point-line relationship. For this purpose, a typical village along the river was taken out to calculate the floodwater line and danger zone. The results showed that the applied method could ascertain the household that was the weakest in the aspect of flood control capacity by combining field investigation and the detennined relationship between households and different frequencies of the floodwater line. Therefore, the flood control capacity of the village along the river could calculate accurately.
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