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双溪小流域,位于湖南省衡阳县西南部花岗岩山丘区,流域面积26.08平方公里,属双溪乡,共14个村,12014人,耕地面积493.1公顷(其中水田451.8公顷,旱土41.3公顷),山地面积1353.93公顷,占总土地面积的51.9%.治理前(1980年),水土流失面积1509.1公顷,占流域面积的57.87%,其中轻度流失占17.6%,中度流失占27.8%,强度流失占38.9%,剧烈流失占15.7%.年泥沙流失总量
Shuangxi small watershed, located in Hengyang County, Hunan Province, southwestern granite hills, the basin area of 26.08 square kilometers, Shuangxi Township, a total of 14 villages, 12014 people, 493.1 hectares of arable land (of which 451.8 hectares of paddy fields, 41.3 hectares of dry land ), And the mountainous area is 1353.93 hectares, accounting for 51.9% of the total land area. Before the management (1980), the area of soil erosion was 1509.1 hectares, accounting for 57.87% of the drainage area, of which 17.6% was moderately lost, 27.8% The intensity loss accounted for 38.9%, violent loss accounted for 15.7% of the total annual sediment loss