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1 全市水利建设现状及灾害分析1.1 水利建设成效显著新中国成立以来,全市开展了大规模的水利建设,采取“上控、下排、中改善”的治水方针,初步形成了防洪、兴利、除害、发电、养殖综合利用的水利工程体系。一是防洪工程体系日臻完善:全市已建成4座大型水库,9座中型水库,149座小型水库,3座滞洪区,拦蓄洪水能力达39亿 m~3,是洪汝河多年来水量的3倍,有效地控制了山区洪水;二是除涝配套工程排涝能力有了提高:对30～100km~2的支沟治理72条,面上除涝配套21.2
1 Present Situation and Disaster Analysis of Water Conservancy Construction in China 1.1 Significant Achievements in Water Conservancy Construction Since the founding of new China, a large-scale water conservancy construction has been carried out in the whole city and a water control policy of “controlling, discharging and improving” has been formed. Flood control, Lee, removal, generation, breeding comprehensive utilization of water conservancy project system. First, the system of flood control works is improving. Four large reservoirs, nine medium reservoirs, 149 small reservoirs and three detention basins have been built in the city, with a capacity of 3.9 billion m 3 for stopping floods and floods and three times as much as that of Hongru River , Effectively controlling the flood in mountainous areas; secondly, the waterlogging supporting facilities have improved their drainage capacity: 72 branch ditches of 30 ~ 100km ~ 2 and 21.2