金沙江流域高原山地系统分异规律的分析研究

Analysis and research on diversity law of plateau mountainous region system of the Jinshajiang River valley.

该文根据长江上游金沙江流域高原山地具有山高坡陡 ,土壤侵蚀面广、侵蚀量大 ,支流和干流落差大 ,搬运能力强 ;气候条件恶劣、生态环境严重恶化 ,植被恢复难度大 ;经济发展普遍滞后 ,贫困面大等突出特点 .利用金沙江流域高原山地系统具有地域分异的规律性这一基本原理 ,在充分调查分析了该流域内云南 4 7个县、市、区自然生态、社会经济条件的基础上 ,按照高原山地空间层次结构的多样性 ,对构成金沙江流域这一极为复杂的开放性景观生态系统的地貌、气候、森林植被、社会经济、土壤侵蚀等多级子系统的分异规律进行分析研究 ,以求得实现系统恢复与功能需求的一致性 。

The Jinshajiang River valley lies in the transition belt between the southeast edge of Qinghai Xizang Plateau and Sichuan Basin and it is a special ecological and economic zone of the upper reaches of the Yangtze River. The valley has characteristics as follows: high and steep mountains, wide range and large amount of soil erosion, sharp fall of the river branch and artery, strong scouring power, hard weather conditions, worsening ecological environment, uneasily resuming vegetation and undeveloped economy, etc. According to the spacial hiberarchy diversity and on the basis of analysing and investigating the ecological, social and economic conditions of 47 countries in the valley, this paper studies the diversity law of valley physiognomy system, weather system, forest and vegetation systems, social and economic systems and soil erosion system. All of these form the complicated and open landscape ecological system. Analysing and studying this valley is to realize the coherence between the system restoration and function requirements, and then to provide a scientific foundation for the ecological restoration of the valley.