地处淮河下游,面积近100万亩,是江苏省第3大湖泊,具有明显的过水性特点。从上个世纪末到本世纪初湖区网围养殖蓬勃发展,2003年达到高峰,总面积约有20万亩,大多数是单一养殖河蟹的生产模式。受连续几年的大水影响,生产效益比较差,网围养殖面积逐渐缩减,现有网围养殖面积约12万亩 Located in the lower reaches of the Huaihe River, an area of ​​nearly 1000000 acres, is the third largest lake in Jiangsu Province, with obvious characteristics of over water. From the end of last century to the beginning of this century, the lake area nets breeding flourish, reaching its peak in 2003, with a total area of ​​about 200000 acres, most of them are single farming crabs production model. Affected by the flood for several years in a row, the production efficiency is rather poor, and the net area of ​​aquaculture is gradually reduced. The existing aquaculture area is about 120,000 mu