Analysis on Runoff Changes and their Causes in the Upper Yangtze River Basin
The Yangtze River from the source regions to the Yichang station is called as the upper Yangtze River.Its area is about one million square kilometres.The runoff changes at sixteen main control stations in the upper reaches of Yangtze River basin were analyzed firstly.The results show that except in the Jinsha River basin, the runoff in the other basin decreased more or less.Among them, the runoff in the Minjiang River, Hengjiang River, Tuojiang River and Jialing River decreased significantly.The runoff at the Cuntan station increased before 1968, but decreased significantly after 1993.A large scale distributed monthly water balance model was developed and applied in the upper Yangtze River.The model was used to evaluate the impacts of climate change and human activities on the changes of runoff generation in the upper Yangtze River basin and to explore the causes of runoff change.The runoff at the Cuntan station of Yangtze River decreased significantly since 1993 and climate change was the main factor that the contribution rate of climate change was 71.43%.Meanwhile, it was need paid attention to that the runoff in the Minjiang and Jialing River basin decreased obviously and the contribution of human activities to runoff change reaches to about a half.It was related to the intense human activities in those areas.Human activities will most probably play a dominant role in influencing the discharge of the Minjiang and Jialing River basin.
hydrology and water resources distributed monthly water balance model runoff change human activities climate change the upper Yangtze River
Miaolin Wang Jun Xia
Upper Yangtze River Survey Bureau of Hydrology & Water Resources, Bureau of Hydrology, Changjiang Wa Key Laboratory of Water Cycle & Related Land Surface Processes, Institute of Geographic Sciences and
国内会议
贵阳
英文
1144-1152
2010-11-02（万方平台首次上网日期，不代表论文的发表时间）