DOI: 10.5194/hess-21-183-2017
Scopus记录号: 2-s2.0-85009268768
论文题名: Effects of land use/land cover and climate changes on surface runoff in a semi-humid and semi-arid transition zone in northwest China
作者: Yin J ; , He F ; , Jiu Xiong Y ; , Yu Qiu G
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 1 起始页码: 183
结束页码: 196
语种: 英语
Scopus关键词: Catchments
; Land use
; Runoff
; Water resources
; Arid and semi-arid regions
; Drying condition
; Hydrological cycles
; Hydrological simulations
; Land use/land cover
; Simulated results
; Soil and water assessment tool
; Vulnerable ecosystems
; Climate change
; climate change
; climate conditions
; human activity
; humid environment
; hydrological cycle
; land cover
; land use change
; limiting factor
; precipitation (climatology)
; runoff
; semiarid region
; soil and water assessment tool
; transition zone
; water resource
; China
; Jing Basin
; Loess Plateau
英文摘要: Water resources, which are considerably affected by land use/land cover (LULC) and climate changes, are a key limiting factor in highly vulnerable ecosystems in arid and semi-arid regions. The impacts of LULC and climate changes on water resources must be assessed in these areas. However, conflicting results regarding the effects of LULC and climate changes on runoff have been reported in relatively large basins, such as the Jinghe River basin (JRB), which is a typical catchment (>45000 km2) located in a semi-humid and arid transition zone on the central Loess Plateau, northwest China. In this study, we focused on quantifying both the combined and isolated impacts of LULC and climate changes on surface runoff. We hypothesized that under climatic warming and drying conditions, LULC changes, which are primarily caused by intensive human activities such as the Grain for Green Program, will considerably alter runoff in the JRB. The Soil and Water Assessment Tool (SWAT) was adopted to perform simulations. The simulated results indicated that although runoff increased very little between the 1970s and the 2000s due to the combined effects of LULC and climate changes, LULC and climate changes affected surface runoff differently in each decade, e.g., runoff increased with increased precipitation between the 1970s and the 1980s (precipitation contributed to 88% of the runoff increase). Thereafter, runoff decreased and was increasingly influenced by LULC changes, which contributed to 44% of the runoff changes between the 1980s and 1990s and 71% of the runoff changes between the 1990s and 2000s. Our findings revealed that large-scale LULC under the Grain for Green Program has had an important effect on the hydrological cycle since the late 1990s. Additionally, the conflicting findings regarding the effects of LULC and climate changes on runoff in relatively large basins are likely caused by uncertainties in hydrological simulations. © 2017 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79301
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, China; Department of Water Resource and Environments, School of Geography and Planning, Sun Yat-Sen University, Guangzhou, China; Department of Land, Air and Water Resources, University of California at Davis, Davis, CA, United States; Shenzhen Engineering Laboratory for Water Desalinization with Renewable Energy, School of Environment and Energy, Peking University, Shenzhen, China
Recommended Citation:
Yin J,, He F,, Jiu Xiong Y,et al. Effects of land use/land cover and climate changes on surface runoff in a semi-humid and semi-arid transition zone in northwest China[J]. Hydrology and Earth System Sciences,2017-01-01,21(1)