Change of Hydrological and Meteorological Elements in the Yellow River Source Area and its Impact on Ecological Environment

摘要

Through analyzing long - period change of precipitation, evaporation, runoff and other hydrological elements in Yellow River source area as well as image and video data obtained through satellite from the 1970s to the 1990s, the paper draws a conclusion that climate change and human activities greatly change ecological environment in the Yellow River source area and are the main influencing factor of ecological environment in the Yellow River source area.