Schulte-Rentrop, Annette
[Author]
;
Dittrich, Andreas
[Contributor]
Morphodynamic hazard analysis for river restoration and flood mitigation measures ; Gefährdungsanalyse für morphodynamische Entwicklung bei Flussrenaturierung und naturnahen Hochwasserschutzkonzepten
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Text;
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Doctoral Thesis
Title:
Morphodynamic hazard analysis for river restoration and flood mitigation measures ; Gefährdungsanalyse für morphodynamische Entwicklung bei Flussrenaturierung und naturnahen Hochwasserschutzkonzepten
Contributor:
Schulte-Rentrop, Annette
[Author]
imprint:
TU Braunschweig: LeoPARD - Publications And Research Data, 2009-11-06
Footnote:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Description:
In the course of river regulation, climate change and the EU WFD, new sustainable flood protection measures are developed which go hand in hand with natural river behaviour and ecological demands. However, inundation hazards are often accompanied by morphological response of the river which can cause severe consequences in addition. Thus, sustainable nature-close flood risk management calls for explicit consideration of fluvial dynamics in addition to inundation studies alone. In the dissertation, a new concept is developed for identification, analysis and assessment of local morphodynamic hazards which is adequate for planning optimisation of nature-close flood protection measures in gravel-bed rivers. The state of the art reveals the complex three-dimensional interactions among river geometry, flow, sediment transport and vegetation. To tackle this, the concept integrates a Risk Identification procedure based on a detailed hydromorphologic characterisation where Elements at Risk and potential hazards can be clearly detected. In the Hazard Analysis, a 1D/3D approach is developed for the computation of the three-dimensional hydraulic flow field including a physically based approach of flow resistance due to vegetation in order to account for mass and impulse transfer accurately. A semi-qualitative prognosis of the fluvial morphological response on the flow field is implemented including approaches for stability and sediment transport behaviour. For the estimation of longterm morphodynamic processes the use of regime equations is suggested. To support model outcomes, the concept includes sound calibration and validation procedures with field data as well as permanent checks for plausibility. The application of the concept to a case study in the Upper Rhine shows promising and plausible results for a complex, vegetated river section. The new procedure may contribute to sustainable nature-close flood protection and support planning optimisation. ; Im Zuge des Klimawandels und der EU-Wasserrahmenrichtlinie werden ...