IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : The Aftermath of Room for the River and Restoration Works: Excessive Maintenance Dredging ?
The Aftermath of Room for the River and Restoration Works: Excessive Maintenance Dredging ?
Author : Hendrik Havinga and Rick van Adrichem
In the Netherlands currently a large number of river intervention works are planned within the Room for the River Program (RfR) and the European Water Framework Directive (WFD). The measures increase the flood conveyance capacity as well as biodiversity. Popular measures are dike setback, lowering flood plains, reconnecting side channels and removal of bank defences. These river intervention works have a strong impact on flow and sediment transport fields, and will induce larger dynamics of the riverbed. This negatively influences the river?s navigability. Thus, maintenance costs for navigation are expected to rise as a consequence of the increase in the required dredging operations of each individual project. Moreover, the intended dredging operations will hamper inland navigation significantly, resulting in large economical impacts and a lower safety of inland navigation. To prevent this, the lay-out of the Dutch river system should be designed in such a way that it keeps itself navigable. The reduction of dredging amounts can be achieved by structural measures. This paper discusses the results of a study of the increase and uncertainty of maintenance dredging on the Waal River and the changes in navigability, before and after execution of the Room for the River program. A 2D morphological model is used, both a deterministic calculation method and a probabilistic Monte Carlo Simulation method have been applied. The results of the analyses served also to better understand the merits of probabilistic methods and integrated impact assessment.
File Size : 1,378,594 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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