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DOI | 10.1029/2018WR023120 |
Hydrological Drought Instantaneous Propagation Speed Based on the Variable Motion Relationship of Speed-Time Process | |
Wu, Jiefeng1,2,3; Chen, Xiaohong1,2,3; Yao, Huaxia4; Liu, Zhiyong1,2,3; Zhang, Dejian5 | |
2018-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:11页码:9549-9565 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Canada |
英文摘要 | It is difficult to predict and track the propagation of a hydrological drought because it is hard to determine its propagation speed. We propose a useful framework for calculating the hydrological drought instantaneous propagation speed which includes the instantaneous development speed (IDS) and instantaneous recovery speed (IRS). First, the run theory was applied to subdivide the propagation of individual hydrological drought events into the development and recovery stages and to determine the individual propagation times (drought development duration and drought recovery duration). Then the hydrological drought instantaneous propagation speed of each hydrological drought event, including the IDS and IRS, were determined based on the variable motion relationship of speed-time process commonly applied in physics. Finally, the optimal theoretical values of the IDS and IRS were evaluated using a cross-validation method. Three hydrometric stations, located at the upstream catchment with less human activities influence, were chosen from different countries (China, the United States, and Germany) to demonstrate the satisfactory performance of this proposed framework. The results indicate that the variable motion relationship of speed-time process can provide an assessment of the overall hydrological drought propagation and perform well for identifying the propagation time in these study areas. The optimal theoretical values of IDS (or IRS) obtained by the variable motion relationship can simulate the actual drought development duration (or drought recovery duration) of hydrological drought well. The sensitivity of IDS (or IRS) of hydrological drought is correlated with climate, catchment characteristics, and human activities that should be explored to improve hydrological drought propagation prediction. |
英文关键词 | hydrological drought drought propagation propagation time instantaneous development speed instantaneous recovery speed |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453369400053 |
WOS关键词 | RIVER-BASIN ; METEOROLOGICAL DROUGHT ; CLIMATE-CHANGE ; MODEL ; FLOW ; STREAMFLOW ; IMPACTS ; INDEX ; IDENTIFICATION ; VARIABILITY |
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/19937 |
专题 | 资源环境科学 |
作者单位 | 1.Sun Yat Sen Univ, Ctr Water Resources & Environm, Guangzhou, Guangdong, Peoples R China; 2.Sun Yat Sen Univ, Guangdong Engn Technol Res Ctr Water Secur Regula, Guangzhou, Guangdong, Peoples R China; 3.Sun Yat Sen Univ, Guangdong High Educ Inst, Key Lab Water Cycle & Water Secur Southern China, Guangzhou, Guangdong, Peoples R China; 4.Ontario Minist Environm Conservat & Pk, Dorset Environm Sci Ctr, Dorset, ON, Canada; 5.Xiamen Univ Technol, Coll Comp & Informat Engn, Xiamen, Peoples R China |
推荐引用方式 GB/T 7714 | Wu, Jiefeng,Chen, Xiaohong,Yao, Huaxia,et al. Hydrological Drought Instantaneous Propagation Speed Based on the Variable Motion Relationship of Speed-Time Process[J]. WATER RESOURCES RESEARCH,2018,54(11):9549-9565. |
APA | Wu, Jiefeng,Chen, Xiaohong,Yao, Huaxia,Liu, Zhiyong,&Zhang, Dejian.(2018).Hydrological Drought Instantaneous Propagation Speed Based on the Variable Motion Relationship of Speed-Time Process.WATER RESOURCES RESEARCH,54(11),9549-9565. |
MLA | Wu, Jiefeng,et al."Hydrological Drought Instantaneous Propagation Speed Based on the Variable Motion Relationship of Speed-Time Process".WATER RESOURCES RESEARCH 54.11(2018):9549-9565. |
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