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城湖,多为古城旧址,是豫东平原主要的水域形态,在河南省商丘市所辖的六县二区一市中就有城湖7座,水面总面积1.54万亩,也是当地主要的商品鱼生产基地,这些水域水面宽阔,水深3m左右,底部平坦,水位季节性变化幅度不大,且在整个湖水水体中沉积物分布均匀,营养物含量丰富,溶解氧充足,水体透明度0。6m～1.0m,水质良好无污染,适宜进行网箱养鱼。2000年,商丘市虞城县水务局水产技术
City Lake, mostly the site of the ancient city, is the major waterfront form of the East Henan Plain, Shangqiu City, Henan Province, under the jurisdiction of six counties in two cities and one city lake, the total surface area of 15400 acres, is also the main local Commercial fish production base, these waters have a wide water surface with a depth of about 3 m, a flat bottom and a small seasonal variation in water level. The sediments are evenly distributed throughout the lake water and have abundant nutrients and sufficient dissolved oxygen. The water transparency is 0.6 m ~ 1.0m, good water quality, suitable for cage fish. In 2000, Shangqiu Yucheng County Water Bureau aquatic technology