scholarly journals Selection of the Optimal Design Rainfall Return Period of Urban Drainage Systems

2014 ◽  
Vol 89 ◽  
pp. 742-749 ◽  
Author(s):  
A. Fortunato ◽  
E. Oliveri ◽  
M.R. Mazzola
Keyword(s):  
Optimal Design ◽  
Return Period ◽  
Urban Drainage ◽  
Drainage Systems ◽  
Design Rainfall ◽  
Urban Drainage Systems ◽  
Selection Of

scholarly journals Return period assessment of urban pluvial floods through modelling of rainfall–flood response

2018 ◽  
Vol 20 (4) ◽  
pp. 829-845 ◽  
Author(s):  
Damian Murla Tuyls ◽  
Søren Thorndahl ◽  
Michael R. Rasmussen
Keyword(s):  
Return Period ◽  
Urban Areas ◽  
Urban Drainage ◽  
Return Periods ◽  
Drainage Systems ◽  
Flood Impacts ◽  
Urban Drainage Systems ◽  
Flood Estimation ◽  
Flood Response ◽  
The Impact

Abstract Intense rainfall in urban areas can often generate severe flood impacts. Consequently, it is crucial to design systems to minimize potential flood damages. Traditional, simple design of urban drainage systems assumes agreement between rainfall return period and its consequent flood return period; however, this does not always apply. Hydraulic infrastructures found in urban drainage systems can increase system heterogeneity and perturb the impact of severe rainfall response. In this study, a surface flood return period assessment was carried out at Lystrup (Denmark), which has received the impact of flooding in recent years. A 35 years' rainfall dataset together with a coupled 1D/2D surface and network model was used to analyse and assess flood return period response. Results show an ambiguous relation between rainfall and flood return periods indicating that linear rainfall–runoff relationships will, for the analysed case study, be insufficient for flood estimation. Simulation-based mapping of return periods for flood area and volume has been suggested, and moreover, a novel approach has been developed to map local flood response time and relate this to rainfall characteristics. This approach allows to carefully analyse rainfall impacts and flooding response for a correct flood return period assessment in urban areas.

Implications of climate and urban development on the design of sustainable urban drainage systems (SUDS)

2012 ◽  
Vol 3 (4) ◽  
pp. 239-256 ◽  
Author(s):  
Annette Semadeni-Davies
Keyword(s):  
Climate Change ◽  
Urban Development ◽  
Adaptation Strategy ◽  
Urban Drainage ◽  
Response Curves ◽  
Drainage Systems ◽  
Future Design ◽  
Urban Drainage Systems ◽  
Receiving Environments ◽  
Selection Of

This paper explores the implications of climate change and urban development on the design of sustainable urban drainage systems (SUDS) using the example of ponds and raingardens in Auckland, New Zealand. Many of Auckland's coastal and freshwater receiving environments have been degraded due to stormwater inflows and are potentially at further risk due to continued urbanisation and climate change. SUDS have been suggested as a possible means of adapting to those risks. However, there is little guidance available on how they should be designed for future conditions. Response-curves which relate changes in SUDS sizing to both climate change and imperviousness are presented as a means of displaying a range of possible future design needs. It is suggested that they could aid in the selection of adaptation strategies. The methodology followed is based on publicly available guidance material to provide a real world example of the design issues facing stormwater managers. An incremental adaptation strategy, whereby construction is staggered over time, is recommended for ponds which vary greatly in size depending on the projected climate and imperviousness. In contrast, adapting raingardens at the time of construction is pragmatic as the change in size, with even the maximum projected climate change, is modest.

scholarly journals Optimal Design of Urban Drainage Systems using Genetic Algorithms

2007 ◽  
Author(s):  
Paul Boulos ◽  
◽  
Trent Schade ◽  
Christopher W. Baxter ◽  
Misgana Muleta ◽  
...  
Keyword(s):  
Genetic Algorithms ◽  
Optimal Design ◽  
Urban Drainage ◽  
Drainage Systems ◽  
Urban Drainage Systems

Assessment of urban flooding by dual drainage simulation model RisUrSim

2005 ◽  
Vol 52 (5) ◽  
pp. 257-264 ◽  
Author(s):  
T.G. Schmitt ◽  
M. Thomas ◽  
N. Ettrich
Keyword(s):  
Simulation Model ◽  
Surface Flow ◽  
Water Levels ◽  
Model Verification ◽  
Urban Drainage ◽  
Urban Flooding ◽  
Insurance Company ◽  
Drainage Systems ◽  
Engineering Research ◽  
Urban Drainage Systems

The European research project in the EUREKA framework, RisUrSim is presented with its overall objective to develop an integrated planning tool to allow cost effective management for urban drainage systems. The project consortium consisted of industrial mathematics and water engineering research institutes, municipal drainage works as well as an insurance company. The paper relates to the regulatory background of European Standard EN 752 and the need of a more detailed methodology to simulate urban flooding. The analysis of urban flooding caused by surcharged sewers in urban drainage systems leads to the necessity of a dual drainage modeling. A detailed dual drainage simulation model is described based upon hydraulic flow routing procedures for surface flow and pipe flow. Special consideration is given to the interaction between surface and sewer flow during surcharge conditions in order to most accurately compute water levels above ground as a basis for further assessments of possible damage costs. The model application is presented for a small case study in terms of data needs, model verification and first simulation results.

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