南湾水库位于河南省信阳市西南8.5公里的淮河支流浉河上,建成于1955年。是一座以防洪、灌溉为主,结合发电、城市工业和居民生活用水,养鱼、航运、旅游等综合利用的大型水利枢纽工程。控制流域面积1100km2,最大防洪库容为16.3亿m3。水库流域内气候温和,雨量充沛,年平均气温16.3℃,多年平均降雨为1140mm,沿库区周围山岭起伏,其中山岭占50％,丘陵占28％,农田占18％。坝址以上库水面有三大支流河道组成,即西双河、浉河、董家河。水库库岸曲折,自然形成库湾众多,库内最宽水面2km,最大水深近30m,最长航线达30余km,核定养鱼水面6.86万亩,常年平均为7.1万亩。沿库区周围山林植被良好,无污染,库水透明度1.5～3.15m,。PH值7左右,水体溶氧充足,水质肥沃,水体中浮游生 Nanwan Reservoir is located in Xunyang City, Henan Province, 8.5 kilometers southwest of the Huaihe River tributary of the Hu River, built in 1955. Is a flood control, irrigation, combined with power generation, urban industrial and residential water, fish, shipping, tourism and other comprehensive utilization of large-scale water conservancy project. Control basin area of ​​1100km2, the maximum flood control capacity of 1.63 billion m3. The climate in the reservoir basin is mild with abundant rainfall. The annual average temperature is 16.3 ℃ and the average annual rainfall is 1140mm. The mountainous area fluctuates around the reservoir area, with 50% of the mountains, 28% of the hills and 18% of farmland. The reservoir above the dam has three major tributaries of the river, namely, Xishuangbanna, Bahe, Dong River. Reservoir bank twists and turns, the natural formation of a large reservoir Bay, the reservoir widest water 2km, the maximum water depth of nearly 30m, the longest route of more than 30 km, approved aquatic water 6.86 hectares, perennial average of 7.1 hectares. The vegetation around the reservoir area is good and pollution-free. The water transparency of the reservoir is 1.5-3.15m. PH value of about 7, dissolved oxygen sufficient water, fertile water, plankton in the water