Approximate calculation of flash flood maximum inundation extent in small catchment with large elevation difference
文献类型：期刊论文
| 作者 | Li Xinjuan2,3 ; Lin Jiayuan1; Zhao Wei3; Wen Fengping2,3
|
| 刊名 | Journal of Hydrology
 |
| 出版日期 | 2020 |
| 卷号 | 590页码:125195 |
| 关键词 | Catchments Flood control Forestry Remote sensing Runoff Surveying |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2020.125195 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Inundation analysis is one of the core aspects of flash flood prevention and control in mountainous area. Remote sensing technology can conveniently extract submerged region of a large flood, but infeasible to dynamically obtain flood inundating process in a high temporal resolution. Meanwhile, it is difficult to establish a suitable hydrodynamics-based inundation model under conditions of complex terrain. Moreover, such model usually requires huge input data and long simulation time. The Bulk Method (BM) can quickly calculate flood inundation extent, given the total water yield in the catchment and local Digital Elevation Model (DEM). However, the traditional BM is only applicable for relatively flat terrain. In order to apply BM to calculation of the flash flood inundation extent in the catchment of large elevation difference, the differential BM based on differential element theory is proposed in this paper. In the method, the main flood channel is divided into a certain number of differential channel segments, in which the local elevation difference is relatively small, and the BM can be soundly applied. The flood inundation extent of the whole channel can be obtained by combining the maximum inundation extents of all differential channel segments. Furthermore, it is the key to determine the optimal number of channel segments by repeating the prior steps of the proposed method until the area change ratio of the total inundation extents calculated in two consecutive loops is less than the specified threshold value. Taking Zharugou Catchment as the study area, we obtained the approximate maximum inundation extent of a once in 10-year flood occurred there on July 10th, 2018. As the calculation results were generally in good agreement with the field measuring data, it demonstrated the feasibility and effectiveness of the differential BM in approximately calculating the maximum flood inundation extent in a small ungauged catchment with sharp elevation variation. © 2020 Elsevier B.V. |
| 语种 | 英语 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/46659]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 成都山地灾害与环境研究所_数字山地与遥感应用中心 |
| 通讯作者 | Li Xinjuan |
| 作者单位 | 1.Chongqing Engineering Research Center for Remote Sensing Big Data Application, School of Geographical Sciences, Southwest University, Chongqing, 400715, China 2.University of Chinese Academy of Sciences, Beijing, 100049, China; 3.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China; |
| 推荐引用方式 GB/T 7714 | Li Xinjuan,Lin Jiayuan,Zhao Wei,et al. Approximate calculation of flash flood maximum inundation extent in small catchment with large elevation difference[J]. Journal of Hydrology,2020,590:125195. |
| APA | Li Xinjuan,Lin Jiayuan,Zhao Wei,&Wen Fengping.(2020).Approximate calculation of flash flood maximum inundation extent in small catchment with large elevation difference.Journal of Hydrology,590,125195. |
| MLA | Li Xinjuan,et al."Approximate calculation of flash flood maximum inundation extent in small catchment with large elevation difference".Journal of Hydrology 590(2020):125195. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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