Velocity and water-layer thickness of overtopping flows on sea dikes: Report of measurements and formulas development

The study aims to establish a set of formulas estimating velocity and depth of overtopping flows at sea dikes including seaward-side slope, crest and landward-side slope. These formulas are applicable to flows which are generated by natural waves and the simulator giving associated characteristics of any arbitrary value of exceedance probability...

Effect of uncertainty in wave growth calculation on overtopping over dikes: A case study

Example calculation of a dike height incorporating the uncertainty in the wave growth formula of Young and Verhagen.

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)...

Van dijkversterking naar dijkvervaging: Onderzoek naar de mogelijkheden van brede waterkeringen in Groningen.

Climate change will cause increasing physical loads on the flood defence of the Province of Groningen along the North Sea over the next decades. This is caused by a sea level rise between 15 and 35 centimetres whilst the ground level is lowering between 38 and 48 centimetres until the year 2050. This results in salt-water intrusion into the land...

Development of Alternative Overtopping-Resistant Sea Defences: Proposal for concepts

The present proposal deals with a presentation of three potentially feasible concepts for strengthening of the sea defences as to allow for increased wave overtopping, within the framework of ComCoast. In addition, for each concept an indicative proposal is given for a further theoretical study (Phase 2) and an indicative approach is shown for...

Overtopping resistant dike, Sandy dike

An important element in the ComCoast concept is the overtopable sea defence (often a dike). In this concept the landward (inner) slope of the dike is adjusted in such a way that it can withstand higher overtopping rates. Two new concepts for covering the inner slope, sand cover and perforated mats, are discrebed in this report.

Approach to the innovative design of an overtopping discharge resistant dike

The objective of ComCoast (Combined functions in coastal defence zones) is to investigate how a multifunctional wide sea defence zone might be created. Instead of just increasing the height and weight of the dike, solutions are searched in the wide sea defence zone landward. These is an number of technical solutions, one of them is increasing...

Spatial Reconnaissance: Technical Report ComCoast

ComCoast (Combined Functions in Coastal Defence Zones) is an INTERREG IIIB project funded by the EU. ComCoast aims to develop and demonstrate innovative solutions for flood protection in coastal areas. In ComCoast, five countries from the North Sea Region are involved: Belgium, Denmark, The Netherlands, Germany, and the UK. In total, ten...

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...

Innovative concept overtopping dike: Crest Drainage Dike, Theoretical Study

The ComCoast concept involves measures in seaward and landward direction. One of the options in landward direction is an overtopping dike. In this concept the crest and/or inner slope of the dike is strengthened so that more overtopping of the dike can be allowed. Advantage is that heightening of the dike is not necessary and furthermore this...

Innovative concept for an overtopping dike

The ComCoast concept involves measures in seaward and landward direction. One of the options in landward direction is an overtopping dike. In this concept the crest and/or inner slope of the dike is strengthened so that more overtopping of the dike can be allowed. Advantage is that heightening of the dike is not necessary and furthermore this...

Erosion tests on Hannover clay

Residual strenght after initial failure by overflow / overtopping

Golfoploop en golfoverslag

Bij het samenstellen van het rapport "Golfoploop en golfoverslag" is er naar gestreefd: een overzicht te geven van de betreffende literatuur, de in deze literatuur voorkomende gegevens te analyseren en te interpreteren, waar mogelijk verbanden te leggen tussen de resultaten uit de verschillende literatuurbronnen, aanbevelingen te geven voor...

Wave run-up and overtopping

Overview of methods to design wave run-up and overtopping for dikes and other sloping structures for regular and irregular breaking waves. Summary of experimental data and suggestions for design formulae. English translation of: Golfoploop en golfoverslag - http://resolver.tudelft.nl/uuid:522060cb-8202-4276-bc48-ace65e137f40