Froehlich, Felix ; Dittmann, Robert ; Muschalla, Dirk ; Bornschein, Antje ; Ostrowski, Manfred W. ; Pohl, Reinhard (2007)
Can we improve dam safety and ecological dam performance at the same time?
75th Annual Meeting of the ICOLD, Dam Safety Management – Role of State, Private Companies and Public in Designing, Constructing and Operating of Large Dams. St. Petersburg, Russia (24.06.2007-24.06.2007)
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
Natural river habitats are subject to continuous changes. The flow regime of a stream affects flow velocity, water depth, sediment transport, water quality and river morphology, as well as the frequency and depth with which floodplains are inundated. The flow regime thus acts as a 'master variable' that influences many aspects of the river habitat. Many aquatic organisms are specialised on being able to cope with the continuously changing environment they inhabit, some are capable of using these circumstances to their advantage and others even depend on them. Reservoir releases that do not imitate the natural flow regime result in changed habitat conditions for organisms inhabiting the affected reaches below the reservoir. In many cases, this leads to an ecological impoverishment of the affected reaches and/or to the invasion of foreign species that are better suited to survive in the changed conditions, in both cases resulting in a changed ecosystem. This research project focuses on the reduction of flood risk along rivers regarding both the failure probability of affected structures as well as the damage inflicted upon socio-economic and ecological values downstream of reservoirs. This is achieved by developing tools that allow for improved, model-based reservoir regulation with dynamic releases. In order to preserve or restore a natural river habitat, the flow regime of a river that is affected by a reservoir has to imitate the natural flow regime as closely as possible. This concerns properties such as quantity, frequency, duration, timing as well as the rate of change of flow. A reservoir operation model is used to define dynamic releases which can then be optimised with regard to multiple target criteria (flood protection, ecological issues) using evolutionary algorithms. The methodology is applied to different study areas in Germany in order to improve existing reservoir operating rules regarding both flood protection as well as ecological aspects.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2007 |
| Autor(en): | Froehlich, Felix ; Dittmann, Robert ; Muschalla, Dirk ; Bornschein, Antje ; Ostrowski, Manfred W. ; Pohl, Reinhard |
| Art des Eintrags: | Bibliographie |
| Titel: | Can we improve dam safety and ecological dam performance at the same time? |
| Sprache: | Englisch |
| Publikationsjahr: | Juni 2007 |
| Verlag: | ICOLD |
| Veranstaltungstitel: | 75th Annual Meeting of the ICOLD, Dam Safety Management – Role of State, Private Companies and Public in Designing, Constructing and Operating of Large Dams |
| Veranstaltungsort: | St. Petersburg, Russia |
| Veranstaltungsdatum: | 24.06.2007-24.06.2007 |
| Kurzbeschreibung (Abstract): | Natural river habitats are subject to continuous changes. The flow regime of a stream affects flow velocity, water depth, sediment transport, water quality and river morphology, as well as the frequency and depth with which floodplains are inundated. The flow regime thus acts as a 'master variable' that influences many aspects of the river habitat. Many aquatic organisms are specialised on being able to cope with the continuously changing environment they inhabit, some are capable of using these circumstances to their advantage and others even depend on them. Reservoir releases that do not imitate the natural flow regime result in changed habitat conditions for organisms inhabiting the affected reaches below the reservoir. In many cases, this leads to an ecological impoverishment of the affected reaches and/or to the invasion of foreign species that are better suited to survive in the changed conditions, in both cases resulting in a changed ecosystem. This research project focuses on the reduction of flood risk along rivers regarding both the failure probability of affected structures as well as the damage inflicted upon socio-economic and ecological values downstream of reservoirs. This is achieved by developing tools that allow for improved, model-based reservoir regulation with dynamic releases. In order to preserve or restore a natural river habitat, the flow regime of a river that is affected by a reservoir has to imitate the natural flow regime as closely as possible. This concerns properties such as quantity, frequency, duration, timing as well as the rate of change of flow. A reservoir operation model is used to define dynamic releases which can then be optimised with regard to multiple target criteria (flood protection, ecological issues) using evolutionary algorithms. The methodology is applied to different study areas in Germany in order to improve existing reservoir operating rules regarding both flood protection as well as ecological aspects. |
| Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut Wasserbau und Wasserwirtschaft > Fachgebiet Ingenieurhydrologie und Wasserbewirtschaftung 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut Wasserbau und Wasserwirtschaft 13 Fachbereich Bau- und Umweltingenieurwissenschaften |
| Hinterlegungsdatum: | 19 Jan 2009 16:38 |
| Letzte Änderung: | 05 Mär 2013 09:17 |
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