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《Geomatics World》 2017-01
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Temporary Precaution Method for Rainstorm-type Flood Disaster with Real-time Rainfall Data

DU Zhiqiang;WANG San;ZHANG Yeting;State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University;Collaborative Innovation Center of Geospatial Technology;  
This paper proposes a temporary pre-warning method of flash flood based on real-time rainfall data to solve the problem of poor timeliness of existing methods. With the factors of abnormal rainfall, terrain fluctuation, evation and river network, the paper builds a disaster risk index to analyze short term flash flood risk at the scale of day. The abnormal rainfall is identified by historical and real-time rainfall data according to the time series analysis model. From the perspective of abnormal rainfall causes disaster, the risk is divided into five levels, which are no risk, low risk, medium risk, senior risk and high risk by the abnormal degree of rainfall, and they are meaningful to provide disaster warning and some reference information for disaster prevention and reduction. Taking the flash flood ocuured in Qingyuan city in Guangdong province in May, 2014 as an example, and daily risk distribution maps between May 21 st and May 26 th are expressed. Experimental results suggest that the middle and lower part of Yangshan county in Qingyuan is in high risk of flash flood during the six days, and this method can provide a new technical way for temporary disasters warning.
【Fund】: 国家自然科学基金项目(41571390);; 国家高分辨率对地观测系统应用系统(民用部分)建设项目(03-Y30B06-9001-13/15)资助
【CateGory Index】: P426.616
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