金沙江河谷热区,由于干旱燥热气候影响,加上开发利用不当及长期忽视水土保持和生态建设等原因,生态环境严重恶化,光山秃岭,冲沟烂阱遍布,河谷热区1450米海拔以内森林覆盖率普遍不足1%.大量的低山丘陵土地光热资源丰富,却因缺水而长期利用不起来.根据自然条件和目前财力状况,要解决这部分土地的灌溉相当困难,研究该层位土地的利用是干热河谷热区开发的 Due to the hot and humid climate in the Jinsha River valley, due to the improper exploitation and utilization and long-term neglect of soil and water conservation and ecological construction, the ecological environment has deteriorated. The forest coverage rate is generally less than 1% .A large number of hilly land rich in light and heat resources, but long-term use due to lack of water can not afford.According to the natural conditions and the current financial situation, to solve this part of the irrigation of the land is quite difficult to study this layer The use of land is developed in hot dry valley areas