Application of sediment transport formulae to sand-dike breach erosion

The Technical Advisory Committee on Water Defences in the Netherlands has decided to develop a mathematical model for breach erosion in dunes and dikes, with which it will be possible to predict the growth of the breach and the discharge rate through the breach in case of a dike-burst. An essential part of such a mathematical model is the...

Low-exceedance wave overtopping events: Estimates of wave overtopping parameters at the crest and landward side of dikes

Low-exceedance wave overtopping events: Measurements of velocities and the thickness of water-layers on the crest and inner slope of dikes

Erosion tests on Hannover clay

Conceptual model for reinforced grass on inner dike slopes

A desk study has been carried out in order to develop a conceptual model for the erosion of inner dike slopes with reinforced grass cover. Based on the results the following can be concluded: The presence of a geosynthetic in a grass slope can be taken into account in the EPM method by increasing the critical flow velocity. In particular, a...

State-of-the-art inventory

The present report provides a state-of-the-art inventory of relevant information and technical concepts for the ComCoast project, being the first phase of the research stages of Work Package 3 (WP3). This project was assigned to Royal Haskoning by CUR. The information scan was set-up in a systematic way. About 160 relevant references have been...

Learning from participation: Quick scan of Participatory Action

Projects using innovative concepts in coastal defence -like ComCoast- can benefit greatly from participatory action. It can lead to innovative solutions with a broad societal support base, as is shown in the plan for water storage in the Overdiepse polder and the inundation compensation scheme for farmers in the upper River Dinkel region. This...

Golfoverslag en sterkte binnentalud bij dijken

Dit verslag is een rapportage van ons afstudeerproject voor de opleiding algemene Civiele Techniek aan de Noordelijke Hogeschool Leeuwarden.Dit afstudeerproject is in samenwerking met INFRAM uitgevoerd. Het onderzoek richt zich op de sterkte van grasbekleding op het binnentalud van zeedijken. Voor het beproeven van de grasmat op locatie wordt...

Hydraulic model tests of an innovative dike crest design

Report on laboratory tests on a crest drainage dike; investigation if a channel in the crest of the dike is able to decrease the amount of overtopping over the dike. Chapter 2 provides details about findings from previous studies and the relevance of those findings to this research project. Available literature on wave run-up and wave...

Placement of Smart Grass reinforcement at test sections Groningen Sea dike

The present report deals with the application of a provisional Smart Grass Reinforcement (SGR) system in 2006 for full scale testing of increased overtopping at the Groningen sea dyke test section near Delfzijl, as envisaged in 2007. The SGR has been placed at two strips of 4 m wide: one primary strip at the basic test site and one at a...

Wave overtopping erosion tests at Groningen sea dyke

In the present report field erosion tests of the inner slope of a sea dyke in the province of Groningen (near Delfzijl) are described for the situation of severe wave overtopping. Three types of tests have been performed: tests at the present grass cover, tests at a reinforced grass cover and tests at a section of bare clay. At the reinforced...

Design, construction, calibration and use of the wave overtopping simulator

The wave overtopping simulator is a device which is able to simulate overtopping waves at the crest of a dike and at the inner slope. The device has been used in the ComCoast project to test a traditional dike section with grass and the SGR, the Smart Grass Reinforcement, placed in May 2006. This report describes in the first part (Chapters 1-6)...

Protecting St. Bernard Parish, New Orleans: Revision of the coastal defence zone

This document is the final report of a Master thesis research. The research was executed as cooperation between Delft University of Technology, ARCADIS and ComCoast as part of The Road and Hydraulic Engineering Institute of the Directorate-General of Public Works and Water management (RWS DWW). In this report, the hurricane defence system of St....

Coastal defence cost estimates: Case study of the Netherlands, New Orleans and Vietnam

This study is part of a global study on the costs of adaptation to the effects of climate change. It adds information from three specific case studies (the Netherland, New Orleans and Vietnam) to the global study. The case study areas are comparable by type of coast; all are low-lying deltaic coastal areas. This study investigates the unit cost...

Accidental use of earth bodies as flood defence: The Vlaardingen case study

An overview of the upgrade of the railroad dike in Vlaardingen to a full sea defence, creating in this way a multifunctional flood defence.