位于长江上游的云南省近年来注重生态建设与水土治理，在金沙江流域的楚雄、昭通等地推进水土保持工作，使这里出现了山青坡绿的良好势头．水土流失一直是云南省面临的严峻环境问题，在局部地区更成了发展经济的主要制约因素．云南省从１９８９年起实施“长治”工程，在１０多 Yunnan Province, located in the upper reaches of the Yangtze River, has paid attention to ecological construction and soil and water conservation in recent years and promoted soil and water conservation work in areas such as Chuxiong and Zhaotong in the Jinsha River basin, bringing about a good momentum here. Soil and water loss has always been a serious environmental problem facing Yunnan Province. In some areas, it has become a major constraint on economic development. Yunnan Province since 1989, “Changzhi” project, at more than 10