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宁南县位于四川省西南部的金沙江干热河谷地带,幅员面积1675平方公里,山地占84%,耕地17.4万亩,其中坡耕地8.9万亩,占耕地面积的51.15％。全县总人口15.2万,其中以彝族为主的少数民族人口有3.47万人。境内最大相对高差达3339米,年均降水量960毫米,91％的降水量集中在5～10月,暴雨多,降水强度大,对土地的冲刷侵蚀十分严重,泥石流灾害时有发生。据1988年统计,全县水土流失面积达918.6平方公里,占总面积的55％,给农业生产的发展带来了困难。 1989年,宁南县列入长江上游水土保持重点防治县,第一期和第二期小流域治理工程需
Ningnan County is located in the dry and hot valley of the Jinsha River in the southwest of Sichuan Province. It covers an area of 1,675 km 2, covers 84% of the mountain area and 174,000 mu of cultivated land, of which 89,000 mu is sloping land, accounting for 51.15% of the cultivated land area. The total population of 152,000 in the county, of which there are 34,700 ethnic minorities mainly Yi population. The territory of the largest relative elevation of 3339 meters, the average annual rainfall of 960 mm, 91% of the rainfall concentrated in May to October, heavy rainfall, rainfall intensity, the erosion of the land erosion is very serious, debris flow hazards occur from time to time. According to 1988 statistics, the county soil erosion area of 918.6 square kilometers, accounting for 55% of the total area, to the development of agricultural production has brought difficulties. In 1989, Ningnan County was included in the key flood control and prevention counties in the upper reaches of the Yangtze River, and the first and second small watershed management projects needed