Investigation and simulations of changes in the relationship of precipitation-runoff in drought years
文献类型：期刊论文
| 作者 | Tian, Wei1,2; Liu, Xiaomang1 ; Liu, Changming1; Bai, Peng1
|
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2018-10-01 |
| 卷号 | 565页码:95-105 |
| 关键词 | Drought Precipitation-runoff relationship Hydrological model Objective function |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2018.08.015 |
| 通讯作者 | Liu, Xiaomang() |
| 英文摘要 | The frequency and intensity of drought could be increasing with global warming. When drought occurs, the runoff generation process and the precipitation-runoff relationship might change. In this study, the precipitation runoff relationship in drought years was systematically investigated in the largest freshwater lake basin of China, namely, the Poyang Lake Basin. The results showed that the precipitation-runoff relationship changed significantly (p < 0.05) in drought years. The annual runoff coefficient in drought years decreased by 24.1% compared with that in non-drought years. The decreased magnitude of runoff coefficient had a significant positive relationship (p < 0.01) with the drought severity, i.e., the standardized precipitation index of the year. Two hydrological models calibrated by the objective function Nash-Sutcliffe efficiency significantly overestimated runoff in drought years. Three additional objective functions that are sensitive to low flow simulations significantly improved the accuracy of runoff simulation in drought years. Therefore, we recommend that the selected objective functions for runoff simulation in drought years should be sensitive to low flow simulations. Otherwise, the water resources availability will be overestimated in drought years. |
| WOS关键词 | WATER-BALANCE MODELS ; HYDROLOGICAL MODELS ; CLIMATE-CHANGE ; LOESS PLATEAU ; RIVER-BASIN ; REGIONAL CALIBRATION ; HYDROCLIMATIC CHANGE ; GLOBAL OPTIMIZATION ; NON-STATIONARITY ; LAKE CATCHMENT |
| 资助项目 | National Natural Science Foundation of China[41330529] ; National Natural Science Foundation of China[41571024] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000447477200009 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/52670]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liu, Xiaomang |
| 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,Liu, Xiaomang,Liu, Changming,et al. Investigation and simulations of changes in the relationship of precipitation-runoff in drought years[J]. JOURNAL OF HYDROLOGY,2018,565:95-105. |
| APA | Tian, Wei,Liu, Xiaomang,Liu, Changming,&Bai, Peng.(2018).Investigation and simulations of changes in the relationship of precipitation-runoff in drought years.JOURNAL OF HYDROLOGY,565,95-105. |
| MLA | Tian, Wei,et al."Investigation and simulations of changes in the relationship of precipitation-runoff in drought years".JOURNAL OF HYDROLOGY 565(2018):95-105. |
入库方式： OAI收割
来源：地理科学与资源研究所
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