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四川省开江县东门乡金鸡河流域44.66平方公里,共有14个村,18037人,现有耕地15446亩。原有森林1598亩,占总面积的2.4％,流域内水土流失十分严重,其面积达37.37平方公里,占总面积的83.68％年平均泥沙流失量3514.7吨/平方公里。1983年,经省、地批准,对该流域实施综合治理。经过连续两年多的治理,收到显著成效。 ——成片植树造林22540亩,绿化河流堤岸、公路67.5公里,林草地比例由2.4％提高到36.03％,农耕地比例由31.33％下降到23.06％。除完成生物措施外,新打和恢复沿山沟168条,长56450米新挖和恢复沉沙凼6865个。据调查资料推测:目前该流域年平均泥沙流失量由3514.7吨/平方公里下降到2100吨/平方公里。 ——由于农业生产基本条件得到了改善,尽管退耕还林5540亩,以及非生产用地逐年增加,粮食
East Gate Township, Kaijiang County, Sichuan Province 44.66 square kilometers of Jinji River Basin, a total of 14 villages, 18,037 people, the existing 15,446 acres of arable land. The original forest is 1,598 mu, accounting for 2.4% of the total area. Soil and water loss in the basin is very serious with an area of 37.37 km2, accounting for 83.68% of the total area. The annual average sediment loss is 3514.7 tons / km2. In 1983, approved by the provinces and territories, comprehensive management of the basin was implemented. After more than two consecutive years of governance, it has received remarkable results. - 22540 acres of afforestation in a piece of trees, green river embankment, highway 67.5 kilometers, forest and grassland ratio increased from 2.4% to 36.03%, the proportion of agricultural land decreased from 31.33% to 23.06%. In addition to completing the biological measures, a total of 168 new strikes and restoration along the ravines were completed, with a total length of 56,450 meters and a total of 6,865 new reclaimed and reclaimed areas. According to the survey data, it is speculated that the current annual sediment loss in the basin has dropped from 3514.7 tons / km2 to 2100 tons / km2. - As the basic conditions for agricultural production have been improved, despite the 5,540 mu of conversion of farmland to forests and the increasing non-productive use of land, grain