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	Is the runoff coefficient increasing or decreasing after ecological restoration on Chinas Loess Plateau?
	Zheng Haiyan; Miao Chiyuan; Zhang Guanghui; Li Xiaoyan; Wang Shuai; Wu Jingwen; Gou Jiaojiao
来源期刊	International Soil and Water Conservation Research
ISSN	2095-6339
出版年	2021
卷号	9 期号:3 页码:333-343
英文摘要	The Grain for Green project (GGP) was launched in 1999 on Chinas Loess Plateau to reduce soil erosion, which had far-reaching impacts on the local eco-hydrological processes. In this study, we use monthly runoff depth and precipitation datasets spanning 1961 to 2015 for 16 primary basins of the plateau to reveal changes in runoff generation capacity before and after the GGP. We use a Budyko-based elasticity method to calculate the runoff depth (R1) and runoff coefficient (C_1) exclusively attributable to land use/ cover change. Results indicate that the mean annual runoff coefficients (C_0) decline by 26%e76% from the periods 1961-1999 to 2000-2015. The annual observed runoff depth (R0) and C_0 for 75% of basins show significant downward trends during 1961-1999; after the implementation of the GGP, both annual R0 and annual C_0 for over 50% of basins show upward trends. The study further finds that the increase of erosive rainfall during the period 2000-2015, whose mean increasing rate reaches 4.6 mm/year, is the main reason for the upward trends of R0 and C_0. After removing the effect of precipitation variation during this period, we find that 11 out of 16 basins show decreased trends for C_1, with the downward rate between 2.4% and 6.0% per year. The reduction rate in semi-arid areas is about four times the rate in semi-humid areas. The results remind us to consider the carrying capacity of local water resources when implementing soil and water conservation measures across the Loess Plateau.
英文关键词	Loess Plateau Precipitation Runoff coefficient Budyko-based elasticity method Land use/cover change
类型	Article
语种	英语
开放获取类型	gold
收录类别	CSCD
WOS类目	Science & Technology - Other Topics
CSCD记录号	CSCD:7059593
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377422
作者单位	Zheng Haiyan, Faculty of Geographical Science, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing 100875, China.; Miao Chiyuan, Faculty of Geographical Science, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing 100875, China.; Zhang Guanghui, Faculty of Geographical Science, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing 100875, China.; Li Xiaoyan, Faculty of Geographical Science, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing 100875, China.; Wang Shuai, Faculty of Geographical Science, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing 100875, China.; Wu Jingwen, Faculty of Geographical Science, Beijing Normal University, State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing 100875, China.; Gou Jiaojiao, Fa...
推荐引用方式 GB/T 7714	Zheng Haiyan,Miao Chiyuan,Zhang Guanghui,et al. Is the runoff coefficient increasing or decreasing after ecological restoration on Chinas Loess Plateau?[J],2021,9(3):333-343.
APA	Zheng Haiyan.,Miao Chiyuan.,Zhang Guanghui.,Li Xiaoyan.,Wang Shuai.,...&Gou Jiaojiao.(2021).Is the runoff coefficient increasing or decreasing after ecological restoration on Chinas Loess Plateau?.International Soil and Water Conservation Research,9(3),333-343.
MLA	Zheng Haiyan,et al."Is the runoff coefficient increasing or decreasing after ecological restoration on Chinas Loess Plateau?".International Soil and Water Conservation Research 9.3(2021):333-343.