Simulating the change of precipitation-runoff relationship during drought years in the eastern monsoon region of China
文献类型：期刊论文
| 作者 | Tian, Wei1,2; Bai, Peng1; Wang, Kaiwen1,2; Liang, Kang1; Liu, Changming1 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2020-06-25 |
| 卷号 | 723页码:12 |
| 关键词 | Drought Precipitation-runoff relationship Change magnitude of runoff coefficient Multivariate generalized additive model |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2020.138172 |
| 通讯作者 | Bai, Peng(baip@igsnrr.ac.cn) |
| 英文摘要 | Most hydrological simulation and prediction methods assume that the precipitation-runoff relationship was stationary. However, this assumption was found to be questionable during drought years: the annual runoff coefficients (the ratio of annual runoff to annual precipitation) during drought years tend to be smaller than those during non-drought years. However, little is known about the spatial distribution of the magnitude of runoff coefficient change (RCchange) during drought years, and which factors dominate the spatial pattern of RCchange over a large spatial scale. To answer these questions, this study investigated the RCchange in 265 catchments in China that cover a broad range of climate and landscape conditions. We identified the significant factors affecting RCchange from ten catchment characteristics and developed a multivariate generalized additive model to simulate the spatial pattern of RCchange across the eastern monsoon region of China. Results indicated that the RCchange showed an increasing trend from north to south of China, with values ranging from -67.1% to -0.3%, with the average being -26.4%. The lower RCchange (corresponding to more significant runoff reduction) in drought years was more likely to occur in catchments with dryer climate and lower elevation. The simulated RCchange by the multivariate generalized additive model demonstrated a good agreement with observed RCchange, and the values of Nash-Sutcliffe efficiency between observed and simulated RCchange were 0.77 for training catchments and 0.72 for testing catchments. Finally, we applied the model to extrapolate RCchange to the entire eastern monsoon region of China. The result would benefit water resources management during drought years. (C) 2020 Elsevier B.V. All rights reserved. |
| WOS关键词 | HYDROLOGICAL DROUGHTS ; MULTIYEAR DROUGHT ; RIVER-BASIN ; CLIMATE ; WATER ; SOIL ; MODEL ; INDEX ; CATCHMENT ; EVAPORATION |
| 资助项目 | National Natural Science Foundation of China[51979263] ; National Natural Science Foundation of China[41571024] ; National Natural Science Foundation of China[41971035] ; Program for the Youth Innovation Promotion Association of the Chinese Academy of Sciences[2019054] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000535462500014 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Program for the Youth Innovation Promotion Association of the Chinese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/159608]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Bai, Peng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tian, Wei,Bai, Peng,Wang, Kaiwen,et al. Simulating the change of precipitation-runoff relationship during drought years in the eastern monsoon region of China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,723:12. |
| APA | Tian, Wei,Bai, Peng,Wang, Kaiwen,Liang, Kang,&Liu, Changming.(2020).Simulating the change of precipitation-runoff relationship during drought years in the eastern monsoon region of China.SCIENCE OF THE TOTAL ENVIRONMENT,723,12. |
| MLA | Tian, Wei,et al."Simulating the change of precipitation-runoff relationship during drought years in the eastern monsoon region of China".SCIENCE OF THE TOTAL ENVIRONMENT 723(2020):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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