IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) FULL PAPERS : THEME 2- HYDRO-ENVIRONMENT : INVESTIGATION OF STREAMFLOW VARIATIONS OF THE BAIHE RIVER, THE MIYUN RESERVOIR WATERSHED IN NORTHERN...
INVESTIGATION OF STREAMFLOW VARIATIONS OF THE BAIHE RIVER, THE MIYUN RESERVOIR WATERSHED IN NORTHERN CHINA
Author : XUAN WANG , YANGYANG LI ,PEIYU LIANG &GUANGLING HAO
The streamflow variations are affected by climate change and human activities. As a main tributary of the Miyun Reservoir in northern China, the Baihe River has been witnessed significant streamflow variations since 1960s. In this paper, the nonuniform variations of intra-annual streamflow were analyzed, firstly. Then the long-term trend and abrupt changes of streamflow in the Baihe River were investigated at annual scale during the period of 1963-2011 by using the Mann-Kendall method. The F-test method was also introduced for significance test of the streamflow variations. The results were as follows. (1) Flow concentration periods were in July, August and September. This meant that summer and autumn streamflows accounted for a large percentage of annual streamflow, while spring and winter streamflows did small. Intra- annual variations of streamflow?s nonuniform coefficients were large, ranging from 0 to 2.0, and in most years, the values were more than 1.0, while inter-annual variations of streamflow?s nonuniform coefficients were small. (2) The streamflow aberrance of the Baihe River appeared between 1985 and 1986. Both seasonal streamflow and annual streamflow had continuously declined: the average drop of annual streamflow was more than 81.82%, and both summer streamflow and winter streamflow had significant reductions of more than 86% in the past 50 years. (3) The ratio of summer streamflow to the total annual streamflow had an obvious downward trend, while that of autumn streamflow and winter streamflow had an upward trend. The results above can provide scientific supports for local water resource management under environmental change.
File Size : 609,067 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) FULL PAPERS
Article : THEME 2- HYDRO-ENVIRONMENT
Date Published : 18/04/2016
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