Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025840 |
Formulating an Elasticity Approach to Quantify the Effects of Climate Variability and Ecological Restoration on Sediment Discharge Change in the Loess Plateau, China | |
Zhang, Jianjun1,2,3; Gao, Guangyao2,4; Fu, Bojie2,4; Gupta, Hoshin V.5 | |
2019-11-21 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Suspended sediment yields (SSY) respond strongly to ecological restoration (ER) efforts, and significant improvements in SSY control have been achieved in the Loess Plateau of China. However, it remains challenging to quantify the net impacts of ER on SSY. Here, we formulate the notion of elasticity of sediment discharge, by associating SSY change to climate variability and ER over the period 1950s to 2014. All ten of the subcatchments studied experienced significant decreases in annual SSY, streamflow, and suspended sediment concentration. Our results strongly support the hypothesis that changes to both streamflow volumes and to the suspended sediment concentration versus water discharge (C-Q) relationships result in reduced SSY, so that streamflow is reduced but runs clearer. We find that two of the ER strategies resulted in weaker relative impacts of climate variability, largely by reducing streamflow (by 55% to 75%). Meanwhile, ER predominantly decreased SSY (by 63% to 81%). Regarding ER practices, (i) the predominant measure acting to reduce SSY changed, over time, from engineering to reforestation; (ii) check dams preferentially act to regulate the C-Q relationships, whereas reforestation preferentially acts to moderate streamflow. Overall, our results suggest that a combination of engineering and vegetation measures is critical to achieving high-efficiency ER. While change to the ER strategy increased the efficiency of streamflow for SSY control, the lost water discharge per unit SSY reduction increased from 5.2 to 6.4 m(3)t(-1). Conflicting demands for water necessitate that further ER should target precision management by revegetation of targeted areas in the Loess Plateau. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000497603600001 |
WOS关键词 | YELLOW-RIVER BASIN ; SOIL-EROSION ; LAND-USE ; VEGETATION CHANGES ; WATER DISCHARGE ; PRECIPITATION ; LOAD ; CATCHMENT ; HYDROLOGY ; TRANSPORT |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/223922 |
专题 | 资源环境科学 |
作者单位 | 1.China Univ Geosci, Sch Land Sci & Technol, Beijing, Peoples R China; 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing, Peoples R China; 3.Minist Land & Resources, Key Lab Land Consolidat & Rehabil, Beijing, Peoples R China; 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China; 5.Univ Arizona, Dept Hydrol & Atmospher Sci, Tucson, AZ USA |
推荐引用方式 GB/T 7714 | Zhang, Jianjun,Gao, Guangyao,Fu, Bojie,et al. Formulating an Elasticity Approach to Quantify the Effects of Climate Variability and Ecological Restoration on Sediment Discharge Change in the Loess Plateau, China[J]. WATER RESOURCES RESEARCH,2019. |
APA | Zhang, Jianjun,Gao, Guangyao,Fu, Bojie,&Gupta, Hoshin V..(2019).Formulating an Elasticity Approach to Quantify the Effects of Climate Variability and Ecological Restoration on Sediment Discharge Change in the Loess Plateau, China.WATER RESOURCES RESEARCH. |
MLA | Zhang, Jianjun,et al."Formulating an Elasticity Approach to Quantify the Effects of Climate Variability and Ecological Restoration on Sediment Discharge Change in the Loess Plateau, China".WATER RESOURCES RESEARCH (2019). |
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