Assessing the impact of climate variability and human activities on streamflow from the Wuding River basin in China

Hydrological Processes - Tập 21 Số 25 - Trang 3485-3491 - 2007
Jiuyi Li1, Lu Zhang2, Hao Wang3, Juan Wang1, Junwei Yang1, Dejuan Jiang1, Qin Da-yong3
1Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101, People's Republic of China
2CSIRO Land and Water, GPO Box 1666, Canberra ACT 2601, Australia
3China Institute of Water Resources and Hydropower Research, Beijing 100044, People's Republic of China

Tóm tắt

AbstractLocated in the Loess Plateau of China, the Wuding River basin (30 261 km2) contributes significantly to the total sediment yield in the Yellow River. To reduce sediment yield from the catchment, large‐scale soil conservation measures have been implemented in the last four decades. These included building terraces and sediment‐trapping dams and changing land cover by planting trees and improving pastures. It is important to assess the impact of these measures on the hydrology of the catchment and to provide a scientific basis for future soil conservation planning. The non‐parametric Mann–Kendall–Sneyers rank test was employed to detect trends and changes in annual streamflow for the period of 1961 to 1997. Two methods were used to assess the impact of climate variability on mean annual streamflow. The first is based on a framework describing the sensitivity of annual streamflow to precipitation and potential evaporation, and the second relies on relationships between annual streamflow and precipitation. The two methods produced consistent results. A significant downward trend was found for annual streamflow, and an abrupt change occurred in 1972. The reduction in annual streamflow between 1972 and 1997 was 42% compared with the baseline period (1961–1971). Flood‐season streamflow showed an even greater reduction of 49%. The streamflow regime of the catchment showed a relative reduction of 31% for most percentile flows, except for low flows, which showed a 57% reduction. The soil conservation measures reduced streamflow variability, leading to more uniform streamflow. It was estimated that the soil conservation measures account for 87% of the total reduction in mean annual streamflow in the period of 1972 to 1997, and the reduction due to changes in precipitation and potential evaporation was 13%. Copyright © 2007 John Wiley & Sons, Ltd.

Từ khóa


Tài liệu tham khảo

10.1016/j.jhydrol.2004.12.010

Dai MY, 2002, Study of Changes in Runoff and Sediment Load in the Yellow River, 991

10.1002/qj.49711649110

10.1016/S0309-1708(99)00019-6

10.1002/hyp.1454

10.1016/j.advwatres.2005.11.001

Kendall MG, 1975, Rank Correlation Measures

10.1175/1520-0442(1999)012<1911:ASFFET>2.0.CO;2

Liu CM, 1978, The effect of forest on stream flow in the Loess Plateau, Acta Geographica Sinica, 33, 112

10.2475/ajs.298.4.265

10.2307/1907187

10.1029/2001WR000760

10.1023/A:1008048212420

10.1006/jare.1999.0618

SneyersR.1975.Sur l'analyse statistique des séries d'observations. WMO Tech Note.

10.1061/(ASCE)0733-9496(1994)120:4(485)

Xu JH, 2000, Study on the impact of Hydraulic Engineering and Soil Water Conservation Works on Stream‐Flow and Sediment Load in the Coarse Sandy Hilly Region of the Yellow River Basin

Zhan SL, 1994, Methods of Calculating effect of Soil and Water Conservation Measures

Zhang JJ, 2002, Study of Changes in Runoff and Sediment Load in the Yellow River, 393

10.1029/2000WR900325

Zhang SL, 1998, Changes in Streamflow and Sediment Load in the Coarse Sandy Hilly Areas of the Yellow River Basin

Thông tin
Thông tin xuất bản

Hydrological Processes

Tập 21 Số 25

3485-3491

Thông tin tác giả