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华阳湖泊位于长江下游的左岸,距鄱阳湖湖口下约45公里,湖泊面积为1600平方公里,(在一般年份湖水位为16.75公尺),当蓄洪水位18.8公尺时,蓄洪量可达46.0亿公方,是长江下游主要的蓄洪垦殖区,按1955年华阳河湖蓄洪垦殖工程初步设计:在蓄洪计划方面;拟在长江小孤山附近建分洪工程,在洪水年份,分蓄长江洪水46.0亿公方入华阳蓄洪区。在拟建分洪工程的上游,有鄱阳湖汇注长江,(按鄱阳湖面积为5000平方公里,1954年同马大堤
Huayang Lake is located on the left bank of the lower reaches of the Yangtze River. It is about 45 kilometers below the Poyang Lake mouth and has a lake area of 1,600 square kilometers (at a lake level of 16.75 meters in normal years). When the flood storage level reaches 18.8 meters, 4600000000 public square, is the main flood storage and reclamation area of the lower reaches of the Yangtze River, according to 1955 Huayang River flood storage reclamation project preliminary design: in the flood storage plan; proposed to be in the vicinity of the Yangtze River Xiaogushan flood diversion project, in the flood year, 4600000000 public square into Huayang flood storage area. In the upstream of the planned flood diversion project, Poyang Lake relies on the Yangtze River (according to Poyang Lake area of 5000 square kilometers, 1954 Tongma Dike