滇西北地理环境特征与区域水土流失相互作用机制研究

滇西北地区是高山峡谷区．是长江上游天然林保护和长江流域中下游的生态屏障和我国重要的生态功能区，也是新构造活动异常频繁、造貌过程活跃和生态环境极其脆弱的地区。自然环境和人文因子的作用对该区的坡面稳定性、地表土壤—植被生态系统的稳定性和水土流失的强度、类型有重要作用。通过详细的野外考察和资料分析，探讨了滇西北地区的自然环境因子——地质、地貌、土壤、植被、气候、水文及人文因子如人口、土地利用、经济社会状况对区域水土流失的影响。从地理环境宏观层面看水土流失，对滇西北地区的水土保持、生态环境建设和可持续发展有重要意义。

Relationship Between Regional Geographic Environment Characteristics and Soil and Water Loss of Northwest Yunnan Province

Northwest Yunnan province is an area of high mountainous and deep valley. The region also contains protected areas of natural forests in the upper reaches of Yangtze river and provides an ecological barrier between middle and clown reaches of the Yangtze river. It is one of China's important ecological functional regions and is characterized by strong new tectonic movements, active geomorphological processes and a fragile ecology. The natural environment and human activity produce important effects on stability of slopes and soil-vegetation system, and the levels and types of soil erosion. The influence of natural factors, such as geology, landform, soil, vegetation, climate and hydrology, and the influence of human factors like population, land use and socio-economic conditions on regional water and soil erosion are studied through detailed field investigation. This research is of great importance to soil conservation, ecological construction and sustainable development.