Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025380 |
The Impact of Dams on Design Floods in the Conterminous US | |
Zhao, Gang1; Bates, Paul1,2; Neal, Jeffrey1,2 | |
2020-03-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2020 |
卷号 | 56期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | We propose a method to describe the impact of dams on design floods for ungauged areas and validate the method over the conterminous US (CONUS). A Random Forest (RF) model was chosen to capture the relationship between the change in 100-year return period flow up- and downstream of different dams and dam parameters available in the Global Reservoir and Dam (GRanD) database. The results showed that: (1) the RF model showed a greater accuracy in terms of Nash Sutcliffe efficiency coefficient (0.92 in training and 0.88 in testing) than a benchmark Multiple Linear Regression model (0.68 in training and 0.61 in testing); (2) Dam inflow, upstream catchment area, and long-term average discharge at reservoir location were the three most important factors for dam outflow; (3) flood attenuation effect indices (FAI) for >1400 dams over the CONUS were derived with the proposed method. To further validate the accuracy of the FAI, a new module considering flood attenuation effects was developed for the LISFLOOD-FP hydrodynamic model and two dams in the CONUS were selected to compare simulated flooded area against Federal Emergency Management Agency flood hazard maps. The result showed that the overestimation in flood hazard maps caused by not taking dams into account can be significantly corrected using the FAI and the enhanced LISFLOOD-FP model. We conclude that the proposed methodology is a valid approach to describe the impact of dams on design floods, thereby improving the accuracy of flood hazardmaps, especially in ungauged areas. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000538000800050 |
WOS关键词 | FREQUENCY-ANALYSIS ; CLIMATE-CHANGE ; RIVER ; MODEL ; SCALE ; OPTIMIZATION ; OPERATION ; RISK |
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/280595 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Bristol, Sch Geog Sci, Bristol, Avon, England; 2.Fathom, Bristol, Avon, England |
推荐引用方式 GB/T 7714 | Zhao, Gang,Bates, Paul,Neal, Jeffrey. The Impact of Dams on Design Floods in the Conterminous US[J]. WATER RESOURCES RESEARCH,2020,56(3). |
APA | Zhao, Gang,Bates, Paul,&Neal, Jeffrey.(2020).The Impact of Dams on Design Floods in the Conterminous US.WATER RESOURCES RESEARCH,56(3). |
MLA | Zhao, Gang,et al."The Impact of Dams on Design Floods in the Conterminous US".WATER RESOURCES RESEARCH 56.3(2020). |
条目包含的文件 | 条目无相关文件。 |
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