Impacts of land-use conversions on the water cycle in a typical watershed in the southern Chinese Loess Plateau

doi:10.1016/j.jhydrol.2020.125741

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	Impacts of land-use conversions on the water cycle in a typical watershed in the southern Chinese Loess Plateau
	Hu, Jingyi 1; Wu, Yiping 1; Wang, Lijing 1; Sun, Pengcheng 1; Zhao, Fubo 1; Jin, Zhangdong 1,2,3; Wang, Yunqiang 1,2; Qiu, Linjing 1; Lian, Yanqing 2
通讯作者	Wu, Yiping(rocky.ypwu@gmail.com)
	2021-02-01
发表期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
卷号	593 页码:16
摘要	Land use change is one of the dominant driving factors of hydrological change at the watershed scale. Thus, understanding the hydrological responses to land use changes can facilitate development of sustainable water resource management. The land use of the Wei River (the largest tributary of the Yellow River) Basin (WRB) has changed greatly due to the large-scale ecological restoration program in the Chinese Loess Plateau (e.g., grain-for-green program), causing dramatic impacts on the water cycle. This study was to simulate the impacts of land use and land cover change (LUCC) on the key hydrological components, using the Soil and Water Assessment Tool (SWAT). We investigated the spatiotemporal changes of LUCC from 1980 to 2010 in terms of four subregions (i.e., three subbasins and one mid-downstream area) and three landforms (i.e., mountain, hill, and plain), respectively. Then, we quantified the spatial heterogeneity of hydrological responses to land use change scenarios. Our LUCC analysis showed that cropland declined by about 0.8%, from 58,776 km(2) in 1980 to 57,519 km(2) in 2010, whereas the forest and grassland areas correspondingly increased 552 km(2) and 16 km(2), respectively. The urban area changed more dramatically in the middle and lower reaches of the Wei River owing to the faster socioeconomic development in this region than the rest areas. In mountain area, the main types of land use were forest and grassland, and the main transformation was from cropland to forest land and grassland. The area of cropland in plain could be over 50%, and it was mainly converted to urban land. The hydrological simulation indicated that LUCC from 1980 to 2010 caused 5.3% of decrease in the water yield and 6.2% increase in soil water content, but there was nearly no change in evapotranspiration (ET). Scenarios about slopping land use conversion (SLC) program showed that the conversion of cropland to grassland or forest (i.e., grain-for-green) resulted in negative effects on soil water content and water yield, with a greater effect by the reforestation. In addition, we found that the change of ET was clear in areas where cropland with slope > 15. was converted to grassland or forest, suggesting slope is also an important factor for hydrological responses to LUCC. This study can provide valuable decision support for land use planning and water resources protection in the WRB.
关键词	ET Land use change Soil water content SWAT The Wei River Basin
DOI	10.1016/j.jhydrol.2020.125741
关键词[WOS]	WEI RIVER-BASIN ; DRIVING FORCES ; CLIMATE-CHANGE ; SWAT MODEL ; UNDERLYING SURFACE ; SOIL-MOISTURE ; COVER CHANGE ; RUNOFF ; RESOURCES ; CATCHMENT
收录类别	SCI ; SCI
语种	英语
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDB40020205] ; National Science Foundation of China[31961143011] ; National Key Research and Development Program of China[2019YFC0507403] ; Shaanxi Key Research and Development Program of China[2018ZDXM-GY-030] ; National Thousand Youth Talent Program of China
WOS研究方向	Engineering ; Geology ; Water Resources
项目资助者	Strategic Priority Research Program of Chinese Academy of Sciences ; National Science Foundation of China ; National Key Research and Development Program of China ; Shaanxi Key Research and Development Program of China ; National Thousand Youth Talent Program of China
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000639853400016
出版者	ELSEVIER
引用统计	被引频次：47[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/16343
专题	加速器质谱中心第四纪科学与全球变化卓越创新中心
通讯作者	Wu, Yiping
作者单位	1.Xi An Jiao Tong Univ, Dept Earth & Environm Sci, Xian 710049, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710075, Peoples R China 3.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Hu, Jingyi,Wu, Yiping,Wang, Lijing,et al. Impacts of land-use conversions on the water cycle in a typical watershed in the southern Chinese Loess Plateau[J]. JOURNAL OF HYDROLOGY,2021,593:16.
APA	Hu, Jingyi.,Wu, Yiping.,Wang, Lijing.,Sun, Pengcheng.,Zhao, Fubo.,...&Lian, Yanqing.(2021).Impacts of land-use conversions on the water cycle in a typical watershed in the southern Chinese Loess Plateau.JOURNAL OF HYDROLOGY,593,16.
MLA	Hu, Jingyi,et al."Impacts of land-use conversions on the water cycle in a typical watershed in the southern Chinese Loess Plateau".JOURNAL OF HYDROLOGY 593(2021):16.