A method to identify the weakest link in urban drainage systems
Urban drainage systems are composed of subsystems. The ratio of the storage and discharge capacities of the subsystems determines the performance. The performance of the urban water system may deteriorate as a result of the change in the ratio of storage to discharge capacity due to aging, urbanisat...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-03-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/87/5/1273 |
| _version_ | 1797850601623650304 |
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| author | Didrik Meijer Hans Korving Jeroen Langeveld François Clemens-Meyer |
| author_facet | Didrik Meijer Hans Korving Jeroen Langeveld François Clemens-Meyer |
| author_sort | Didrik Meijer |
| collection | DOAJ |
| description | Urban drainage systems are composed of subsystems. The ratio of the storage and discharge capacities of the subsystems determines the performance. The performance of the urban water system may deteriorate as a result of the change in the ratio of storage to discharge capacity due to aging, urbanisation and climate change. We developed the graph-based weakest link method (GBWLM) to analyse urban drainage systems. Flow path analysis from graph theory is applied instead of hydrodynamic model simulations to reduce the computational effort. This makes it practically feasible to analyse urban drainage systems with multi-decade rainfall series. We used the GBWLM to analyse the effect of urban water system aging and/or climate scenarios on flood extent and frequency. The case study shows that the results of the hydrodynamic models and the GBWLM are similar. The rainfall intensities of storm events are expected to increase by approximately 20% in the Netherlands due to climate change. For the case study, such an increase in load has little impact on the flood frequency and extent caused by gully pots and surface water. However, it could lead to a 50% increase in the storm sewer flood frequency and an increase in the extent of flooding.
HIGHLIGHTS
An analysis of urban water systems with multiyear rainfall series.;
A combined analysis of subsystems of urban water subsystems.;
A sensitivity analysis of urban water systems in consequence of aging or climate change.;
Comparing flood frequency and flood extent caused by capacity reduction of urban water subsystems.;
Flow path analysis from graph theory instead of hydrodynamic model simulations.; |
| first_indexed | 2024-04-09T19:04:03Z |
| format | Article |
| id | doaj.art-d04c451a6f9645dc8e0e7212849d53fa |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-04-09T19:04:03Z |
| publishDate | 2023-03-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-d04c451a6f9645dc8e0e7212849d53fa2023-04-07T15:43:08ZengIWA PublishingWater Science and Technology0273-12231996-97322023-03-018751273129310.2166/wst.2023.057057A method to identify the weakest link in urban drainage systemsDidrik Meijer0Hans Korving1Jeroen Langeveld2François Clemens-Meyer3 Deltares, Boussinesqweg 1, 2629 HV Delft, Postbus 177 2600 MH, Delft, The Netherlands Deltares, Boussinesqweg 1, 2629 HV Delft, Postbus 177 2600 MH, Delft, The Netherlands Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, The Netherlands Faculty of Engineering, Department of Civil & Environmental Engineering, Norwegian University of Science & Technology, Høgskoleringen 6, 7491, Trondheim, Norway Urban drainage systems are composed of subsystems. The ratio of the storage and discharge capacities of the subsystems determines the performance. The performance of the urban water system may deteriorate as a result of the change in the ratio of storage to discharge capacity due to aging, urbanisation and climate change. We developed the graph-based weakest link method (GBWLM) to analyse urban drainage systems. Flow path analysis from graph theory is applied instead of hydrodynamic model simulations to reduce the computational effort. This makes it practically feasible to analyse urban drainage systems with multi-decade rainfall series. We used the GBWLM to analyse the effect of urban water system aging and/or climate scenarios on flood extent and frequency. The case study shows that the results of the hydrodynamic models and the GBWLM are similar. The rainfall intensities of storm events are expected to increase by approximately 20% in the Netherlands due to climate change. For the case study, such an increase in load has little impact on the flood frequency and extent caused by gully pots and surface water. However, it could lead to a 50% increase in the storm sewer flood frequency and an increase in the extent of flooding. HIGHLIGHTS An analysis of urban water systems with multiyear rainfall series.; A combined analysis of subsystems of urban water subsystems.; A sensitivity analysis of urban water systems in consequence of aging or climate change.; Comparing flood frequency and flood extent caused by capacity reduction of urban water subsystems.; Flow path analysis from graph theory instead of hydrodynamic model simulations.;http://wst.iwaponline.com/content/87/5/1273backwater effectscriticalityflow paths analysisgraph theorylinearised hydrodynamicssystem performance |
| spellingShingle | Didrik Meijer Hans Korving Jeroen Langeveld François Clemens-Meyer A method to identify the weakest link in urban drainage systems Water Science and Technology backwater effects criticality flow paths analysis graph theory linearised hydrodynamics system performance |
| title | A method to identify the weakest link in urban drainage systems |
| title_full | A method to identify the weakest link in urban drainage systems |
| title_fullStr | A method to identify the weakest link in urban drainage systems |
| title_full_unstemmed | A method to identify the weakest link in urban drainage systems |
| title_short | A method to identify the weakest link in urban drainage systems |
| title_sort | method to identify the weakest link in urban drainage systems |
| topic | backwater effects criticality flow paths analysis graph theory linearised hydrodynamics system performance |
| url | http://wst.iwaponline.com/content/87/5/1273 |
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