论文部分内容阅读
一、问题的提出 汈汊湖径流区承雨面积1936平方公里,区内地势平坦低法,60％的面积分布在23米至25.5米高程之间。自1971年综合治理以来,汈汊湖区初步形成了一套新的水利体系——深沟大渠,湖泊调蓄,泵站电排,渠网格田;统筹了排、引、蓄、提、降的关系,区内各种面积占有情况如表1。由于地势低洼,经常遭受外江水位顶托。据统计,年平均顶托时间达91.8天,顶托机率为50％,大片农田经常遭受洪涝威胁。因此,如何利用
I. PROBLEM PROBLEMS The catchment area of Runan Lake is 1,936 square kilometers. The area is flat and low with 60% of the area distributed between 23 meters and 25.5 meters. Since the comprehensive management in 1971, a series of new water conservancy systems have been initially formed in the Qionglai Lake area: deep-trench ditches, lake storage and drainage, grids for drainage of pumping stations and grids; Drop relationship, the area occupies a variety of areas such as Table 1. Due to the low-lying, often suffer the water level of the top of the trust. According to statistics, the average annual support time of 91.8 days, the top 50% probability of placement, large areas of farmland are often subjected to flood threats. So, how to use it