River bed response to a changing hydrograph due to climate change

The objective of this thesis is to assess the effects of climate change on the initial, transient and equilibrium response of mixed-sediment river. Climate change will cause changes to hydrographs, which in turn affects sediment transport capacity and thereby the river bed profile. In order to create a better understanding of the processes in...

Assessing the functional performance of the Meuse river: The impact of bed developments and an altering discharge regime on future river functioning

The Meuse river facilitates important socio-economic functions. In the light of Integrated River Management (IRM), the question rises whether these functions can be facilitated in future decades (until 2050) as well. The riverbed is expected to degrade over the coming decades, just like in the past century. On top of that, the discharge regime...

Bed-load transport over inlet sills of longitudinal training walls: Experimental study

This experimental study is about the bed-load transport over inlet sills of longitudinal training walls. The focus is on the flow structures around the inlet: the shape, the processes and the effect on sediment transport. Groynes have been replaced by longitudinal training walls in an 11-km long pilot project to optimize training of the river...

Long-term morphologic development and the effect on hydraulic load: Scenarios for long-term riverbed development in the main channel of the Dutch Rhine system and their impact on hydraulic load

The influence of hydropower developments on the Mekong delta

Rapid hydropower development is taking place in the Mekong river, which is expected to change the natural river regime. Because of the ecological and economical importance of the Mekong delta, the effects of these changes could have large consequences in the delta area. This research focuses on the hydrodynamical processes and assesses potential...

New canalization of the Nederrijn and Lek: Design of a weir equipped with fibre reinforced polymer gates which is designed using a structured design methodology based on Systems Engineering

The Nederrijn and Lek are presently dammed by three weirs, build in 1960 till 1970, which are located near the village of Driel, Amerongen, and Hagestein after which they are named. Weir Driel regulates the distribution of water at the IJsselkop for dammed conditions (discharges lower than 2350 m3/s at Lobith). A minimum discharge of 285 m3/s...

Experimental research on the effects of surface screens on a mobile bed

In 2000 the Dutch government chose a new point of view for the Dutch rivers: “Room for the River”. This viewpoint is the basis for a new approach of high water protection in the Netherlands. Instead of strengthening and raising the dikes, solutions must be based on space and spatial quality. One of the suggested measures is the addition of...

Evaluation of an alternative way of river bank protection in the Meghna Estuary

After the disastrous floods in Bangladesh in 1987 the Flood Action Plan (FAP) was initiated. The FAP was a co-ordinated action to study the flood problems of Bangladesh. The Meghna Estuary Study (MES) was drawn up as a component of the FAP. The overall goal of MES is to ensure the physical safety and social security of the people living in the...

The Feni-river closure dam reviewed

The subject of this study is the Feni River Closure Dam in Bangladesh, which was designed in 1983 and subsequently built in 1985. In this final report the influence is analyzed of advanced design methods, which have become available since 1983, on the geometric dam profile and sea side slope protection. For this purpose the Feni dam was...

Onderzoek, ontwerp en konstruktie van kribben

Detailed analysis of river groynes, extensive literature overview, additonal study on fiction and friction coefficients of several material interfaces (especially between rock and geotextile). Aanlysis of erosion downstream of a groyne with the method of Garde. Field tests.