| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1088/1748-9326/aa7250 |
| The critical role of the routing scheme in simulating peak river discharge in global hydrological models. | |
| Zhao F; Veldkamp TIE; Frieler K; Schewe J; Ostberg S; Willner S; Schauberger B; Gosling SN | |
| 发表日期 | 2017 |
| 出处 | Environmental Research Letters 12 (7): 075003 |
| 出版年 | 2017 |
| 语种 | 英语 |
| 摘要 | Global hydrological models (GHMs) have been applied to assess global flood hazards, but their capacity to capture the timing and amplitude of peak river discharge—which is crucial in flood simulations—has traditionally not been the focus of examination. Here we evaluate to what degree the choice of river routing scheme affects simulations of peak discharge and may help to provide better agreement with observations. To this end we use runoff and discharge simulations of nine GHMs forced by observational climate data (1971–2010) within the ISIMIP2a project. The runoff simulations were used as input for the global river routing model CaMa-Flood. The simulated daily discharge was compared to the discharge generated by each GHM using its native river routing scheme. For each GHM both versions of simulated discharge were compared to monthly and daily discharge observations from 1701 GRDC stations as a benchmark. CaMa-Flood routing shows a general reduction of peak river discharge and a delay of about two to three weeks in its occurrence, likely induced by the buffering capacity of floodplain reservoirs. For a majority of river basins, discharge produced by CaMa-Flood resulted in a better agreement with observations. In particular, maximum daily discharge was adjusted, with a multi-model averaged reduction in bias over about 2/3 of the analysed basin area. The increase in agreement was obtained in both managed and near-natural basins. Overall, this study demonstrates the importance of routing scheme choice in peak discharge simulation, where CaMa-Flood routing accounts for floodplain storage and backwater effects that are not represented in most GHMs. Our study provides important hints that an explicit parameterisation of these processes may be essential in future impact studies. |
| 主题 | Water (WAT) |
| URL | http://pure.iiasa.ac.at/id/eprint/14756/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/131077 |
| 推荐引用方式 GB/T 7714 | Zhao F,Veldkamp TIE,Frieler K,et al. The critical role of the routing scheme in simulating peak river discharge in global hydrological models.. 2017. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Zhao_2017_Environ._R（3195KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
