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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water resources and hydroinformatics : Climate change of the yangtze river basin and impacts on lower reaches flow discharge
Climate change of the yangtze river basin and impacts on lower reaches flow discharge
Author : RONG YANSHU (1), WEI JIA(1), XU YANAN(1) & WANG WEN(2)
ABSTRACT
The Yangtze River is the biggest river in the China and the Asia, accounting for 18.8 % in the total land areas and 38.0
% in the water resources for China. In the recent 50 years, the climate of the Yangtze River basin has obviously
changed duo to building a larger number of key water conservancy projects, and brings about great effects on the water
cycle, environment and ecosystem of this basin.
In this article, the data of key meteorological elements for 50 years (1961-2010) were used to analyze the climate
changes in this basin, including air temperature, precipitation, wind speed, relative humidity and sunshine duration,
coming from 138 meteorological stations. As one of the component of water cycle, the flow discharge time series was
analyzed and the impacts of the climate change were investigated on the flow discharge of the lower reaches of the
Yangtze River by means of series analysis, relationship analysis, and composite analysis. The results showed that the
significant changes of the climate took place in the Yangtze River basin, especially after 1990. It was characterized by
the rising air temperature, but the decreasing precipitation, relative humidity, and sunshine duration, and this kind of
behavior of the climate clearly decreases the flow discharge in lower reaches of the Yangtze River. It is the major
factors that precipitation, relative humidity and sunshine duration resulted in the decrease of the flow discharge in the
lower reaches. The decrease of flow discharge will not only weaken speed of water cycle but also result in press of
rising water demands. This is a dangerous signal
File Size : 517,562 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water resources and hydroinformatics
Date Published : 28/08/2015
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