西南地区干热河谷生态环境问题

Ecological problems of dry hot valley in China southwest

干热河谷是横断山脉地区特殊的地理和气候类型，具有热量充足、干湿季分明、土壤瘠薄、植被稀疏、水土流失严重、生态脆弱、社会经济条件差等特点，加之自然和人为的原因，该地区的植被受到严重的破坏，这些特点决定了干热河谷生态恢复和重建有其自身的特殊性。从干热河谷成因、分布、生态环境问题和社会问题分析其原因，并提出需要解决的生态与环境问题。

The dry hot valley is special type of geography and climate in the transverse mountain area and has the characteristics of sufficient heat, alternation of drying and wetting, hunger soil, sparse vegetation, soil and water critical loss, fragile ecological environment, poor condition of economy and society etc.. In addition, the reasons of natural condition and human disturbance, the vegetation are critically destructed in the region. The characteristics decide the particularity of ecological restoration and regeneration. The article analyse the formation reasons ,distribution range, ecological environmental and social problems of dry hot valley and put forward technical measures to solve ecological environmental problems.