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[1]REN Zongping,XIE Mengyao,MA Yongyong,et al.Periodic Characteristics of Streamflow and Sediment Discharge in Wulanmulun River from 1960 to 2015[J].Research of Soil and Water Conservation,2018,25(06):74-78,93.

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Periodic Characteristics of Streamflow and Sediment Discharge in Wulanmulun River from 1960 to 2015

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 06 Page number: 74-78,93 Column: Public date: 2018-10-26

Title:: Periodic Characteristics of Streamflow and Sediment Discharge in Wulanmulun River from 1960 to 2015

Author(s):: REN Zongping, XIE Mengyao, MA Yongyong, LI Peng; State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China

Keywords:: streamflow; sediment discharge; abrupt change point; Wulanmulun River

CLC:: P333.5

DOI:: -

Abstract:: This study analyzes the variability of annual precipitation, streamflow and sediment discharge in Wulanmulun River. The Mann-Kendall test, Pettitt’s test and wavelet analysis were applied to analyze the trends of the streamflow and sediment discharge in the Wulanmulun River from 1960 to 2015. The results showed that both the abrupt change points of streamflow and sediment discharge appeared in 1996. There was no significant change in precipitation (Z=1.19), and was a slight increase after 2010. Reductions of both streamflow (Z=-5.62) and sediment discharge (Z=-5.56) were found. The streamflow decreased from 250 million m³ to 90 million m³, the sediment discharge also decreased from the 29 651 thousand tons to 15 thousand tons. The main cycle of the annual streamflow was different from that of the annual precipitation, only the similar cycle occurred at 2～4 years and 8～10 years, and the annual streamflow and the sediment discharge had the similar cycle. The research result showed that the short cycle of the streamflow and sediment discharge was controlled by the natural factors including precipitation and solar activity, and also affected by human activity; long cycle characteristics relied on the more than hundred years of hydrological sequence.

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