Breach Initiation and Growth: Physical Processes

During the IMPACT Project a number of large scale field tests were undertaken in Norway to collect data, including extensive video footage, recording the physical processes that occured during the initiation and growth of breach through the test embankments. The video footage has been carefully analysed and key processes identified, to support...

Sea dikes breaching initiated by breaking wave impacts - Preliminary computational model

Sea dikes are of crucial importance in the defence systems of low-lying coastal areas in Germany as well as in other countries such as The Netherlands and Denmark. Breaches of sea dikes due to storm surges are regarded as the main cause of flood disasters, so that a reliable prediction of both breach initiation, breach formation and breach...

Geophysical Monitoring System (GMS)

More than 500,000 km of embankment are used in Europe for transport and flood defence, representing a € 1bn infrastructure asset base, which supports and protects the economy of Europe (e.g. property worth some € 2,000 bn is protected from flooding.) Presently the state and performance of these embankments can only be investigated visually or by...

Modelling Breach Initiation and Growth

This report provides an overview of the technical work undertaken by the partners under FLOODsite Task 6. The research in Task 6 addresses breach initiation and growth. Research was undertaken to (i) investigate and develop preliminary models for predicting wave induced breach initiation (ii) investigate soil processes, review and refine the HR...

Breaching Processes: A state of the art review

This report provides an overview of the state of the art with regards to embankment breach initiation and formation processes. Basic breach formation processes are explained, including a review of commonly held misconceptions. The different stages of breach initiation and formation are also explained, along with the varying needs of different...

Review of the IMPACT Project breach field test data

The IMPACT Project (www.impact-project.net) provided valuable data on breach formation processes. Five large scale field tests were performed in Norway, and a further 22 laboratory tests were performed in the UK. A review of this data has been undertaken to support breach model testing and development under Task 6.

Hydraulic model tests on breaching with and without waves

This report describes small-scaled experiments performed at Leichtweiß-Institute for Hydraulic Engineering and Water Resources, Technical University Braunschweig (LWI). The experiments have been conducted to investigate the development of dike breaches in homogeneous sand dikes with and without a clay layer. The used scaling factor was 1:10.The...

Sea dikes breaching initiated by breaking wave impacts - State of the art

Sea dikes are of crucial importance in the defence systems of low-lying coastal areas in countries such as Germany, The Netherlands or Denmark, etc. Breaches of sea dikes induced by storm surges are regarded as the main cause of coastal flood disasters. Therefore a reliable prediction of both initial conditions for the breach occurrence and the...

Sea dikes breaching initiated by breaking wave impact - Detail computational model

Sea dikes are of crucial importance in the defence systems of low-lying coastal areas in Germany as well as in other countries such as The Netherlands and Denmark. Breaches of sea dikes due to storm surges are regarded as the main cause of flood disasters, so that a reliable prediction of both breach initiation, breach formation and breach...

Breach flow discharge prediction - Analysis of USDA breach flow dataset

This report concerns the analysis of flow/discharge measurements obtained from a set of 441 “rigid breach” models constructed between 22/07/1996 and 10/12/1998 at the Agricultural Research Service of the United States Department of Agriculture (USDA) in Stillwater, Oklahoma, US, by G.J. Hanson and colleagues. Each model consisted of a rigid...

Breaching of coastal dikes. Detailed breaching model

Based on an extensive literature study on the most relevant processes associated with dike breaching and the models available, a modelling strategy was developed which consists in the development of a preliminary and a detailed breaching model (LWI Report 910, FLOODsite Report ). Results from the preliminary model give an overview of the...

Breaching of coastal dikes. Preliminary breaching model

Based on an extensive literature study on the most relevant processes associated with dike breaching and the models available, a modelling strategy was developed which consists in the development of a preliminary and a detailed breaching model (LWI Report 910). This progress report aims to address the development and implementation of the...

Braching of coastal dikes: Reliability analysis and validation of the model system

Based on an extensive literature study on the most relevant processes associated with dike breaching and the models available, a modelling strategy was developed which consists in the development of a preliminary and a detailed breaching model (LWI Report 910, FLOODsite Report ). Results from the preliminary model give an overview of the...

Laboratory Tests on the Erosion of Clay Revetment of Sea Dike With and Without a Grass Cover Induced by Breaking Wave Impact

This report addresses the preparation and performance of laboratory tests on a the erodibility of clay cover with and without grass, subjected to impact pressures generated by controlled falling water mass Three types of clay, representing different erosion resistances as well as grass cover of moderate quality have been used in order to gain...

Predicting Morphological Changes in Rivers, Estuaries and Coasts

This report is the deliverable from the FLOODsite partners contributing to Task 5. Research has been undertaken to improve understanding, models and techniques for the analysis of the performance of the whole flood defence system and its diverse components, including natural and man-made defences (e.g. seawalls, embankments, dunes). In...

Breaching of coastal dikes: State of the art

Coastal dikes are used as defence structures against flooding in lowland areas and where high tidal ranges occur. The development of a breach induced by wave overtopping has been one of the most frequent causes of dike failure and it is closely related both to the dynamics of a protected coast and to the flood risk assessment and management. At...