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在我国东部黄淮海大平原的南部,苏北的西部,镶嵌有一形似昂首展翅的天鹅,那就是我国五大淡水湖之一——洪泽湖。洪泽湖面积1851平方公里,容量24.4亿立方米。湖水深度一般2.5米,最大不到8米。湖底浅平,东部比西部略低;海拔高程10—11米,高出东部平原2—8米不等,全赖东岸人工建筑的石坡大堤拦蓄湖水。因此,洪泽湖是一个大型的内陆外流浅型“悬湖”。它不仅是淮河流域通江达海的水上要冲,而且是灌溉苏北几千万亩农田,具有丰富渔业资源的天然大水库。
In the southern part of the Huang-Huai-Hai Plains in the eastern part of China and in the western part of northern Jiangsu Province, there are inlaid a swan that looks like an erected wing, which is Hongze Lake, one of China’s five major freshwater lakes. Hongze Lake area of 1851 square kilometers, the capacity of 24.4 billion cubic meters. The general depth of the lake 2.5 meters, the largest less than 8 meters. The shallow bottom of the lake, the eastern slightly lower than the west; elevation of 10-11 meters, 2-8 meters above the eastern plains, depends on the eastern coast of the artificial rock embankment block water. Therefore, Hongze Lake is a large inland outflow shallow “hanging lake”. It is not only the gateway to the Huaihe River waterways, but also the irrigation of tens of millions of acres of farmland in northern Jiangsu, with rich natural resources, large reservoirs.