Effects of rainfall spatial inconsistency on flood inundation processes in the Xixian New Area
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
The effects of rainfall spatial inconsistency on urban flood inundation was investigated in this study with a numerical model under the conditions of designed rainstorm and uneven coefficient Cv from different return periods for the Xixian New Area,Shaanxi Province,China.Total volumes of peak waterlogging,volumes of severe peak waterlogging and their reduction rates under uniform rainfall were compared and analyzed.It is found that the waterlogging volumes under uneven spatial distribution decreases in each return periods in comparison with the spatial uniform rainfall..The waterlogging [JP2]reduction magnitudes under uneven rainfall increases as the Cv value increases for every return period.,For example,when the Cv values are 0.07、0.11、0.15 and 0.2,the reduction rates are 2.05%~1.94%,3.00%~3.02%,4.23%~4.08%,4.86%~5.10%,respectively.In the case of severe waterlogging,in comparison with spatial uniform rainfall with same Cv values,the longer the return period,the higher the reduction amount of waterlogging increases.For example,when the Cv value are 0.07,0.11,0.15 and 0.2,the reduction rates are 2.00% to 2.51%,2.60% to 3.82%,3.66% to 4.98%,and 3.80% to 5.83%,respectively.The simulation demonstrates the effects of rainfall spatial inconsistency on urban flood inundation and provides a theoretical basis for urban flood management.
Keywords:
Project Supported:
Clc Number:
Mobile website
® 2024 All Rights Reserved
冀公网安备13010502002656号
冀公网安备13010502002656号