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| Titel |
Staged cost optimization of urban storm drainage systems based on hydraulic performance in a changing environment |
| VerfasserIn |
M. Maharjan, A. Pathirana, B. Gersonius, K. Vairavamoorthy |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 4 ; Nr. 13, no. 4 (2009-04-09), S.481-489 |
| Datensatznummer |
250011830
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| Publikation (Nr.) |
 copernicus.org/hess-13-481-2009.pdf |
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| Zusammenfassung |
| Urban flooding causes large economic losses, property damage and loss of
lives. The impact of environmental changes, mainly urbanization and
climatic change, leads to increased runoff and peak flows which the
drainage system must be able to cope with to reduce potential damage and
inconvenience. Allowing for detention
storage to compliment the conveyance capacity of the drainage system network is one of
the approaches to reduce urban floods. Contemporary practice is to
design systems against stationary environmental forcings – including design
rainfall, landuse, etc. Due to the rapid change in the climate- and the urban environment, this
approach is no longer appropriate, and explicit
consideration of gradual changes during the life-time of
the drainage system is warranted. In this paper, a staged cost optimization
tool based on the hydraulic performance of the drainage system is presented.
A one dimensional hydraulic model is used for hydraulic evaluation of the
network together with a genetic algorithm based optimization tool to
determine optimal intervention timings and responses over the analysis period. The model was applied in a case study area in the
city of Porto Alegre, Brazil. It was concluded that considerable financial
savings and/or additional level of flood-safety can be achieved by
approaching the design problem as a staged plan rather than one-off scheme. |
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