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	Response of hydrological processes to land-cover and climate changes in Kejie watershed, south-west China
	Luo Y.; Ma X.
	2009
关键词	land-cover change climate change SWAT hydrological processes watershed trend analysis river-basin low flows model afforestation streamflow yunnan area precipitation evaporation
英文摘要	Land-cover/climate changes and their impacts on hydrological processes are of widespread concern and a great challenge to researchers and policy makers. Kejie Watershed in the Salween River Basin in Yunnan, South-West China, has been reforested extensively during the past two decades. In terms of climate change, there has been a marked increase ill temperature. The impact of these changes oil hydrological processes required investigation: hence, this paper assesses aspects of changes in land cover and climate. The response of hydrological processes to land-cover/climate changes was examined using the Soil and Water Assessment Tool (SWAT) and impacts of single factor, land-use/climate change on hydrological processes were differentiated. Land-cover maps revealed extensive reforestation at the expense of grassland, cropland, and barren land. A significant monotonic trend and noticeable changes had Occurred in annual temperature over the long term. Long-term changes in annual rainfall and streamflow were weak; and changes in monthly rainfall (May, June, July, and September) were apparent. Hydrological simulations showed that the impact of climate change oil Surface water, baseflow, and streamflow was offset by the impact of land-cover change. Seasonal variation in streamflow was influenced by seasonal variation in rainfall. The earlier onset of monsoon and the variability of rainfall resulted in extreme monthly streamflow. Land-cover change played a dominant role in mean annual Values; seasonal variation in surface water and streamflow was influenced mainly by seasonal variation in rainfall; and land-cover change played a regulating role in this. Surface water is more sensitive to land-cover change and climate change: an increase in surface water in September and May due to increased rainfall was offset by a decrease in surface water due to land-cover change. A decrease in baseflow caused by changes in rainfall and temperature was offset by all increase in baseflow due to land-cover change. Copyright (C) 2009 John Wiley & Sons, Lid.
出处	Hydrological Processes
卷	23
期	8
页	1179-1191
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/311030/23294]
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	Luo Y.,Ma X.. Response of hydrological processes to land-cover and climate changes in Kejie watershed, south-west China. 2009.

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