Variability of Water Resource in the Yellow River Basin of Past 50 Years, China |
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Authors: | Qiang Zhang Chong-Yu Xu Tao Yang |
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Affiliation: | (1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Science, 210008 Nanjing, China;(2) Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Shatin, Hong Kong, China;(3) Department of Geosciences, University of Oslo, PO Box 1047, Blindern, 0316 Oslo, Norway;(4) State Key Laboratory of Hydrology-Water Resources and Hydraulics Engineering, Hohai University, 210098 Nanjing, China |
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Abstract: | We use Mann–Kendall trend test and Lepage method to study spatial and temporal variations of the streamflow series over the
past 50 years based on daily hydrologic data from six gauging stations in the Yellow River basin. Research results indicate
that: (1) The streamflow of the Yellow River basin is decreasing and water resource deficit tends to be more serious from
the upper to the lower Yellow River basin; (2) Zero-flow days are observed after 1970 and overwhelmingly prevail during 1990–2000.
Moreover, zero-flow events are observed mainly during spring and summer; (3) Low flow events are more sensitive to climatic
changes and human activities when compared to the high flow events, which is mainly reflected by larger fluctuation of timing
of change points. Furthermore, the timing of change point of hydrologic events tends to be earlier from the upper to the lower
Yellow River basin, indicating more intensive impacts of human activities on water resource in the lower Yellow River basin.
The current research will be greatly helpful for sound and effective water resource management in the Yellow River basin,
being characterized by serious water deficit. |
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Keywords: | Mann– Kendall trend Lepage test Water resource Yellow River basin |
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