DOI: 10.5194/hess-21-1559-2017
Scopus记录号: 2-s2.0-85015234301
论文题名: Partitioning the impacts of spatial and climatological rainfall variability in urban drainage modeling
作者: Peleg N ; , Blumensaat F ; , Molnar P ; , Fatichi S ; , Burlando P
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 3 起始页码: 1559
结束页码: 1572
语种: 英语
Scopus关键词: Calibration
; Catchments
; Climate models
; Climatology
; Drainage
; Floods
; Fluid dynamics
; Gages
; Hydrodynamics
; Hydrology
; Precipitation (meteorology)
; Rain gages
; Risk assessment
; Runoff
; Spatial distribution
; Stochastic systems
; Water management
; Flood risk assessments
; Natural climate variabilities
; Rainfall variability
; Relative contribution
; Spatial rainfall variabilities
; Storm water management model
; Urban drainage model
; Urban drainage systems
; Rain
; catchment
; channel flow
; design
; drainage network
; hydrodynamics
; network design
; runoff
; sewer network
; urban drainage
; Lucerne [Switzerland]
; Switzerland
英文摘要: The performance of urban drainage systems is typically examined using hydrological and hydrodynamic models where rainfall input is uniformly distributed, i.e., derived from a single or very few rain gauges. When models are fed with a single uniformly distributed rainfall realization, the response of the urban drainage system to the rainfall variability remains unexplored. The goal of this study was to understand how climate variability and spatial rainfall variability, jointly or individually considered, affect the response of a calibrated hydrodynamic urban drainage model. A stochastic spatially distributed rainfall generator (STREAP - Space-Time Realizations of Areal Precipitation) was used to simulate many realizations of rainfall for a 30-year period, accounting for both climate variability and spatial rainfall variability. The generated rainfall ensemble was used as input into a calibrated hydrodynamic model (EPA SWMM - the US EPA's Storm Water Management Model) to simulate surface runoff and channel flow in a small urban catchment in the city of Lucerne, Switzerland. The variability of peak flows in response to rainfall of different return periods was evaluated at three different locations in the urban drainage network and partitioned among its sources. The main contribution to the total flow variability was found to originate from the natural climate variability (on average over 74 %). In addition, the relative contribution of the spatial rainfall variability to the total flow variability was found to increase with longer return periods. This suggests that while the use of spatially distributed rainfall data can supply valuable information for sewer network design (typically based on rainfall with return periods from 5 to 15 years), there is a more pronounced relevance when conducting flood risk assessments for larger return periods. The results show the importance of using multiple distributed rainfall realizations in urban hydrology studies to capture the total flow variability in the response of the urban drainage systems to heavy rainfall events. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79222
Appears in Collections: 气候变化事实与影响
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作者单位: ETH Zurich, Institute of Environmental Engineering, Hydrology and Water Resources Management, Zurich, Switzerland; Swiss Federal Institute of Aquatic Science and Technology, Eawag, Dübendorf, Switzerland; ETH Zurich, Institute of Environmental Engineering, Department of Urban Water Management, Zurich, Switzerland
Recommended Citation:
Peleg N,, Blumensaat F,, Molnar P,et al. Partitioning the impacts of spatial and climatological rainfall variability in urban drainage modeling[J]. Hydrology and Earth System Sciences,2017-01-01,21(3)