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天津市地处海河流域下游,东临渤海。历史上多次受洪水与海潮的侵袭,灾害频繁。为保证市区的防洪安全,除各河上游的防洪措施外,采取优化调度,充分利用其西部几个洼淀的联合滞洪以及保证北大港区入海出路的畅通,都将具有十分重要的意义。一、洼淀现状白洋淀是大清河南支的大型洼淀,被誉为“华北明珠”。淀内面积由50年代560多平方公里(水位9.1米),缩小到目前的391平方公里。从1924年以来,白洋淀容积已减小2—3亿
Tianjin is located in the lower reaches of the Haihe River Basin, east of the Bohai Sea. Many times in history by the invasion of floods and tides, frequent disasters. In order to ensure the flood control safety in the urban area, it is of great significance to take the optimal operation of the flood control measures in the upper reaches of the rivers, make full use of the combined detention of several lakes in the west and to ensure the smooth flow of water out of the Beida Dagang into the sea. First, the status quo Baiyangdian Lake is a large branch of the Qing dynasty, known as the “Pearl of North China.” The inner area of the lake has been reduced from 560 to more than 560 km2 (9.1 m) in the 1950s to the present 391 km2. Since 1924, Baiyangdian volume has been reduced by 2-3 billion