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	Assessing the impact of climate variability and human activities on streamflow from the Wuding River basin in China
	Wang J.; Wang J.; Zhang L.; Zhang L.
	2007
关键词	land use change streamflow regime streamflow trends flow duration curves interannual variability loess plateau vegetation catchment water sensitivity fluxes runoff
英文摘要	Located in the Loess Plateau of China, the Wuding River basin (30261 km 2) 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 (c) 2007 John Wiley & Sons, Ltd.
出处	Hydrological Processes
卷	21
期	25
页	3485-3491
收录类别	SCI
语种	英语
ISSN号	0885-6087
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/23632]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Wang J.,Wang J.,Zhang L.,et al. Assessing the impact of climate variability and human activities on streamflow from the Wuding River basin in China. 2007.

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