我国是世界上山洪灾害最严重的国家之一,全国有29个省(区、市)、1836个县级行政区不同程度地受到山洪灾害的威胁,每年都造成大量人员伤亡和财产损失。据统计,20世纪90年代以来全国因山洪灾害死亡人数平均每年3300多人,2005年全国死亡1200多人。我省地跨长江、黄河、淮河、海河四大流域,山丘 China is one of the most severely affected mountain torrents in the world. There are 29 provinces (autonomous regions and municipalities) across the country, and 1,836 county-level administrative regions are threatened by flash floods in varying degrees. Each year, a large number of casualties and property losses are caused. According to statistics, the number of deaths from floods in the country since the 1990s has averaged more than 3,300 each year. In 2005, more than 1,200 people died in the country. My province across the Yangtze River, the Yellow River, the Huaihe River, the four major river basins, hills