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...

Air trapping phenomenon and cracking - model tests on flood embankment

Failure of natural and man-made earth structures is an important environmental hazard in many climatic conditions with significant socio-economic impact. Failures usually appear as sudden catastrophic events. Actually they are triggered by much slower processes of a progressive nature, occurring within the earth mass without any visible external...

Preliminary reliability analysis of flood defences in the pilot site ‚German Bight Coast’

This report describes the flood defence structures of the pilot site ‘German Bight Coast’ and the overall probability of failure of all flood defences in the area. First, the flood prone area is briefly described as follows: ? the flood prone area ? the failures observed in the past ? an overview of all defence structures ? the flood defence...

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...

Erosion of embankments

Erosion of surface vegetation of fluvial and coastal embankments is the first step in the breach initiation process for an embankment. Detailed knowledge of the driving forces, factors and erosion mechanisms is required to understand and manage the failure risk. Past and present research on the erosion of surface vegetation has been reviewed and...

Qualitative and quantitative reliability analysis of holes in embankments

The aim of this research was to investigate the influence of holes in the grass turf on the failure mechanisms and reliability analysis of dikes. The shape of the holes is either caused by a foreign object, a superficial void in the grass turf or a larger hole caused by for example animal burrowing or vandalism.

Wave overtopping and grass cover layer failure on the inner slope of dikes

This MSc thesis details the investigation of grass cover performance in relation to wave overtopping processes. Failure modes for grass cover are considered and developed

MSettle Version 8.2 - Embankment Design and Soil Settlement Prediction

This is the user manual for MSetuser manual tle, which is being developed by Delft GeoSystems, a Deltares company. MSettle is a dedicated tool for predicting soil settlements by external loading. MSettle accurately and quickly determines the direct settlement, consolidation and creep along verticals in two-dimensional geometry. GeoDelft has been...

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...

Door grond horizontaal belaste palen: Case no recess

In dit rapport zijn de cases opgenomen met betrekking tot validatie van bestaande modellen voor het bepalen van de horizontale grondvervorming. Het betreft de case NO-RECESS waaraan 2 afstudeerders, afzonderlijk, bij Fugro Ingenieursbureau hebben gewerkt. Het gaat om het afstudeerwerk van I. Cherqaoui en R. Servais. Naar aanleiding van beide...

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...

Condition Rating Procedures for Earth and Rockfill Embankment Dams: REMR Management Systems-Flood Control Structures

As a technical report, this document is intended to be a summary of research results. The results include a product that can be used by Districts and others outside the Corps. Current Corps guidance on the use of CIs includes no references to embankment dams or floodcontrol projects. At this time, therefore, each decision maker must individually...

Technical report on soil structures

Design guideline for earth structures (especially water retaining earth structures) like dikes and embankments.

Investigation of slip failures at Henrietta and Anna Regina

More than six kilometers of rehabilitation works on sea defences at the Essequibo and West Deroerara coast of Guyana has been constructed within one year. This shows the fast construction of the riprap revetment design. The performance of the structure was good until the last month of construction when two slip failures occurred of a bout 100 m...

JAMUNA BRIDGE BANK PROTECTION RESEARCH PROJECT

INTRODUCTION GENERAL SUMMARY OF EXPERIMENTS THE HARTEL CANAL PROTOTYPE EXPERIMENTS INTRODUCTION SITUATION INSTALLED INSTRUMENTS HYDRAULIC LOADS BEHAVIOUR OF TEST EMBANKMENTS Loose materials Plaeed (free) bloeks Flexible interloeked bloek revetments Sand-sausage mattresses (Profix) PVC Reno mattresses (Maeeaferri Gabions) Fixtone (Bitumarin B.V.)...