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1 水灾特点及成因分析1.1 水灾的特点①水灾多发生在夏秋季,由一次或数次强降水导致成灾。1992年7月14～21日,一周内降水519mm,占当年降雨量的70%以上,灾情遍及全县。2000年“7·15”大水,2d 降雨达600mm,造成涡河水位暴涨,导致涡河堤防9处漫溢,马头沟受涡河洪水顶托,致使申桥、李原、皇集3乡(镇)0.67万 hm~2农田被淹,直接经济损失5000万元。2003年7～9月连续降雨
1 characteristics and causes of floods 1.1 The characteristics of floods ① floods occurred in summer and autumn, caused by one or more heavy rainfall disaster. July 1992 14 ~ 21, precipitation within a week 519mm, accounting for more than 70% of the rainfall that year, the disaster throughout the county. In 2000, “7 · 15” heavy water, 2d rainfall of 600mm, causing the river water level soared, resulting in nine volcanic overflow embankment, Matougou by the river floodwater top support, resulting in Shanghai Bridge, Li Yuan, Huang Ji 3 townships (towns) 06700 hm ~ 2 farmland flooded, direct economic loss of 50 million yuan. July to September 2003 continuous rainfall