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云南省的社会主义现代化建设,成就巨大,但环境保护工作尚做得不够,特别是水土流失在一些地方还相当突出。1980年全省的水土流失面积是26841.69万平方公里,1986年却扩大到38209.01平方公里。土壤被冲光的地方,不再有作物、牧草、林木生长,还有一些水土流失严重的地方易产生泥石流、大塌方、山洪冲毁农田。1986年仅南涧县就受灾63.13万亩,成灾22558亩。流失的泥沙淤填天然湖泊、水库、塘、河道,使蓄水量减少,灌溉面积缩小,
The socialist modernization drive in Yunnan Province has achieved tremendous achievements. However, environmental protection work has not been done enough. In particular, soil and water loss is still quite prominent in some places. In 1980, the province’s soil erosion area is 268,416,900 square kilometers, but in 1986 it expanded to 38,209.01 square kilometers. Where the soil is polished, there are no more crops, pastures and trees, and some areas where soil and water loss are serious are prone to mudslides, landslides and flash floods that destroy the farmland. In 1986, only 63.13 mu of land was affected in Nanjian County, causing 22,558 mu of disaster. Drainage silt filled natural lakes, reservoirs, ponds, rivers, so that water storage capacity decreased irrigation area reduced,