中清以来人类经济活动对三江源区生态环境的影响

三江源区在江河水流循环和大气环流中的枢纽作用使之在我国生态环境保护与建设中居于重要地位。根据有关历史记载、统计资料和科学知识，本对中清以来各主要时期三江源区的人口变迁、人类活动规模及其对生态环境的影响进行了分析、测算和评估，以期对三江源区生态环境的恢复性保护和建设提供依据。

The affect of human economic activity, from on mid-Qing dynasty, on the eco-environment of three rivers source regions

The pivatal function of the three rivers source terrain in rivers flowing cycling and atmospheric circulation result in it standing crucial position in our country's eco-environment protection and construction. This paper analyzes, calculates and assesses on population vicissitude, and human rice activity scope in eath main period from mid-Qing dynasty on, according to historic records, statistic references and subject knowledges and its affects on eco-environment, in order to give evidences to its recovery and construction.