Estimation of discharges of water flows and debris floods in a small watershed
文献类型：期刊论文
| 作者 | Guo, Xiaojun1,3 ; Cui, Peng1,3; Chen, Xingchang2; Li, Yong1; Zhang, Ju2; Sun, Yuqing2
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| 刊名 | EARTH SURFACE PROCESSES AND LANDFORMS
 |
| 出版日期 | 2021-02-08 |
| 页码 | 18 |
| ISSN号 | 0197-9337 |
| 关键词 | debris flood hydrological simulation peak discharge rainfall Wenchuan earthquake |
| DOI | 10.1002/esp.5053 |
| 通讯作者 | Guo, Xiaojun(aaronguo@imde.ac.cn) |
| 英文摘要 | Floods in small mountainous watersheds cover a wide spectrum of flow. They can range from clear water flows and hyperconcentrated flows to debris floods and debris flows, and calculation of the peak discharge is crucial for predicting and mitigating such hazards. To determine the optimal approach for discharge estimation, this study compared water flow monitoring hydrographs to investigate the performance of five hydrological models that incorporate different runoff yields and influx calculation methods. Two of the models performed well in simulating the peak discharge, peak time, and total flow volume of the water flood. The ratio (gamma) of the monitored debris flood discharge (Q(d)) to the simulated water flow discharge (Q(w)) was investigated. Qualitatively, gamma initially increased with Q(w) but then decreased when Q(w) exceeded a certain threshold, which corresponded to rainfall of 95 and 120 mm in a 6- and 24-h event with a normal distribution of precipitation, respectively. The decrease might be attributable to a threshold of sediment availability being reached, beyond which increased flow rate is not matched by increased sediment input in the large watershed. Uncertainty of hydrological calculation was evaluated by dividing the catchment into sub-basins and adopting different rainfall time steps as input. The efficiency of using a distributed simulation exhibited marginal improvement potential compared with a lumped simulation. Conversely, the rainfall time step input significantly affected the simulation results by delaying the peak time and decreasing the peak discharge. This research demonstrates the applicability of a discharge estimation method that combines a hydrological water flow simulation and an estimation of gamma. The results were verified on the basis of monitored flow densities and videos obtained in two watersheds with areas of 2.34 and 32.4 km(2). |
| 资助项目 | Strategic Priority Research Program, CAS[2019QZKK0903] ; Strategic Priority Research Program, CAS[XDA20030301] ; NSFC[41977257] ; NSFC[41941017] |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| 出版者 | WILEY |
| WOS记录号 | WOS:000615998900001 |
| 资助机构 | Strategic Priority Research Program, CAS ; NSFC |
| 源URL | [http://ir.imde.ac.cn/handle/131551/55946]  |
| 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 |
| 通讯作者 | Guo, Xiaojun |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 2.Southwest Univ Sci & Technol, Sch Environm & Resource, Mianyang 621020, Sichuan, Peoples R China 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Xiaojun,Cui, Peng,Chen, Xingchang,et al. Estimation of discharges of water flows and debris floods in a small watershed[J]. EARTH SURFACE PROCESSES AND LANDFORMS,2021:18. |
| APA | Guo, Xiaojun,Cui, Peng,Chen, Xingchang,Li, Yong,Zhang, Ju,&Sun, Yuqing.(2021).Estimation of discharges of water flows and debris floods in a small watershed.EARTH SURFACE PROCESSES AND LANDFORMS,18. |
| MLA | Guo, Xiaojun,et al."Estimation of discharges of water flows and debris floods in a small watershed".EARTH SURFACE PROCESSES AND LANDFORMS (2021):18. |
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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