Catchments
; Floods
; Fluid dynamics
; Hydrodynamics
; Image resolution
; Meteorological radar
; Radar
; Runoff
; Sewers
; Storms
; Water levels
; Dimensionless parameters
; High resolution radar
; Hydrodynamic modelling
; Hydrodynamic response
; Mean and standard deviations
; Rainfall structures
; Spatial and temporal resolutions
; Water level variations
; Rain
; correlation
; flow modeling
; hydrological modeling
; hydrological response
; rainfall
; runoff
; spatiotemporal analysis
; urban climate
; water depth
; Netherlands
; Rotterdam
; South Holland
英文摘要:
Cities are increasingly vulnerable to floods generated by intense rainfall, because of urbanisation of flood-prone areas and ongoing urban densification. Accurate information of convective storm characteristics at high spatial and temporal resolution is a crucial input for urban hydrological models to be able to simulate fast runoff processes and enhance flood prediction in cities. In this paper, a detailed study of the sensitivity of urban hydrodynamic response to high resolution radar rainfall was conducted. Rainfall rates derived from X-band dual polarimetric weather radar were used as input into a detailed hydrodynamic sewer model for an urban catchment in the city of Rotterdam, the Netherlands. The aim was to characterise how the effect of space and time aggregation on rainfall structure affects hydrodynamic modelling of urban catchments, for resolutions ranging from 100 to 2000 m and from 1 to 10 min. Dimensionless parameters were derived to compare results between different storm conditions and to describe the effect of rainfall spatial resolution in relation to storm characteristics and hydrodynamic model properties: rainfall sampling number (rainfall resolution vs. storm size), catchment sampling number (rainfall resolution vs. catchment size), runoff and sewer sampling number (rainfall resolution vs. runoff and sewer model resolution respectively).
Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands; Department of Geoscience and Remote Sensing, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands; Deltares, Delft, Netherlands
Recommended Citation:
Bruni G,, Reinoso R,, Van De Giesen N,et al. On the sensitivity of urban hydrodynamic modelling to rainfall spatial and temporal resolution[J]. Hydrology and Earth System Sciences,2015-01-01,19(2)