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1 工程概况 南四湖流域位于山东省的西南部,流域面积31700km~2。该流域历史上洪涝灾害频繁,建国以来历经多次治理,仍不能满足流域内社会经济发展的需要,主要是防洪标准偏低。 南四湖清障行洪一期工程,已于2000年8月竣工。但是一期工程是按照20年一遇的标准实施的,现状的防洪能力不能防御20年一遇以上标准的洪水。为了进一步提高南四湖的防洪能力,南四湖清障工程拟在一期工程的基础上进行扩挖。湖内深槽扩挖工程按照50年一遇的防洪标准设计。扩挖
1 Project Overview Nansi Lake Basin is located in the southwest of Shandong Province, the basin area of 31700km ~ 2. In the history of the basin, there are frequent floods and floods. After many times of governance since the founding of the PRC, it still can not meet the needs of social and economic development in the basin. The flood control standards are mainly low. Nansi Lake Qingxian flood a project was completed in August 2000. However, the first phase of the project was implemented in accordance with the once-in-20-year standard. The status quo of flood control can not prevent floods exceeding the standard of more than 20 years. In order to further improve the flood control ability of Nansi Lake, the Nansi Lake project of eliminating the obstacles is planned to expand on the basis of the first phase project. The deep trench expansion project in the lake has been designed according to flood control standards in 50 years. Expand digging