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洞庭湖平原,江河纵横,沿河两岸有大量河洲。据区划调查,仅南县境内,河道长222.3公里,就有河洲面积26489亩。每年汛期,河洲常淹水2—3米,河岸堤距250—4000米,洪水期间,风大浪高,对堤垸安全造成很大威协。历年来,为了防浪护堤,滨湖人民在河洲营造了大量以柳树为主的防浪林。但清一色的柳树林既容易发生病虫为害,又不能为人们提供用材。为了增加河洲造林树种和充分发挥河洲造林的生产潜力,自1976年起,南县进行了河洲营造池杉林实验。
Dongting Lake plain, rivers aspect, along the river has a large number of river banks. According to the zoning survey, only Nanxian County, the river 222.3 km long, there Hezhou area of 26,489 acres. Annual flood season, river Chau often flooded 2-3 meters, bank embankment 250-4000 meters, during the flood, the wind waves, embankment safety caused great Wei Association. Over the years, in order to prevent wave berm, Binhu people in Hezhou to create a large number of willow-based anti-wave forest. However, all-natural willow trees are prone to pests and diseases, but also can not provide timber for people. In order to increase afforestation tree species in Hezhou and give full play to the productive potential of afforestation in Hezhou, Nanxian County has conducted experiments on the cultivation of Ipomoea cairn forests in 1976.