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Effects of the temporal resolution of storm data on numerical simulations of urban flood inundation
Journal of Hydrology ( IF 6.4 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.jhydrol.2020.125100
Jingming Hou , Na Wang , Kaihua Guo , Donglai Li , Haixiao Jing , Tian Wang , Reinhard Hinkelmann

Abstract The temporal resolution of storm data plays an important role in constructing reliable inundation simulations. The effects of the temporal resolution of storms with different return periods, peak coefficients, and durations on the simulated flood inundation were investigated with a two-dimensional numerical model. After analysing the modelled inundation peak values and occurrence times, which are affected by the temporal resolution of a storm, the following conclusions were obtained: 1) the accuracy of the simulated inundation results in terms of the peak values and shift times of the storm increases as the temporal resolution of the storm increases; 2) for the same temporal resolution of storm, the accuracy of the simulated inundation in terms of the peak values and shift times increases as the storm return period increases, except for the shift time in the second test case investigated; 3) for the same temporal resolution of storm, the accuracy of the simulated inundation in terms of the peak values and shift times of the storm does not display an obvious correlation with the storm peak coefficient and storm duration; and 4) the most suitable temporal resolution of storm is 15 min for obtaining an accurate numerical simulation of urban flood inundation. These results can help researchers understand the key effects of the temporal resolution of storms on urban flood inundation and identify storm temporal resolutions that can produce relatively accurate simulated inundation results, even without high-temporal-resolution data.

中文翻译:

风暴数据时间分辨率对城市洪水淹没数值模拟的影响

摘要 风暴数据的时间分辨率在构建可靠的洪水模拟中起着重要作用。采用二维数值模型研究了不同重现期、峰值系数和持续时间的风暴时间分辨率对模拟洪水淹没的影响。通过分析受风暴时间分辨率影响的模拟淹没峰值和发生时间,得出以下结论:1)模拟淹没结果在风暴峰值和移动时间方面的准确性增加随着风暴时间分辨率的增加;2) 对于相同的风暴时间分辨率,随着风暴重现期的增加,模拟洪水在峰值和偏移时间方面的准确性增加,除了调查的第二个测试案例中的班次时间;3)对于相同的风暴时间分辨率,模拟淹没的风暴峰值和偏移时间的准确性与风暴峰值系数和风暴持续时间没有明显的相关性;4) 风暴最合适的时间分辨率为 15 分钟,以获得精确的城市洪水淹没数值模拟。这些结果可以帮助研究人员了解风暴时间分辨率对城市洪水淹没的关键影响,并确定即使没有高时间分辨率数据也可以产生相对准确的模拟淹没结果的风暴时间分辨率。模拟洪水在风暴峰值和移动时间方面的准确性与风暴峰值系数和风暴持续时间没有明显的相关性;4) 风暴最合适的时间分辨率为 15 分钟,以获得精确的城市洪水淹没数值模拟。这些结果可以帮助研究人员了解风暴时间分辨率对城市洪水淹没的关键影响,并确定即使没有高时间分辨率数据也可以产生相对准确的模拟淹没结果的风暴时间分辨率。模拟洪水在风暴峰值和移动时间方面的准确性与风暴峰值系数和风暴持续时间没有明显的相关性;4) 风暴最合适的时间分辨率为 15 分钟,以获得精确的城市洪水淹没数值模拟。这些结果可以帮助研究人员了解风暴时间分辨率对城市洪水淹没的关键影响,并确定即使没有高时间分辨率数据也可以产生相对准确的模拟淹没结果的风暴时间分辨率。4) 风暴最合适的时间分辨率为 15 分钟,以获得精确的城市洪水淹没数值模拟。这些结果可以帮助研究人员了解风暴时间分辨率对城市洪水淹没的关键影响,并确定即使没有高时间分辨率数据也可以产生相对准确的模拟淹没结果的风暴时间分辨率。4) 风暴最合适的时间分辨率为 15 分钟,以获得精确的城市洪水淹没数值模拟。这些结果可以帮助研究人员了解风暴时间分辨率对城市洪水淹没的关键影响,并确定即使没有高时间分辨率数据也可以产生相对准确的模拟淹没结果的风暴时间分辨率。
更新日期:2020-10-01
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