Interaction of Wave Overtopping and Clay Properties for Seadikes

Möller, Janine; Weissmann, R.; Schüttrumpf, Holger; Grüne, Joachim; Oumeraci, Hocine; Richwien, Werner; Kudella, Matthias

doi:10.1142/9789812791306_0177

Cited by 7 publications

(6 citation statements)

References 3 publications

(5 reference statements)

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“…Nevertheless, erosion is more important for the initiation of dike failures and has to be considered first. This is confirmed by results from large scale model tests with clay dikes (Möller et al, 2002). The bottom friction coefficient f has to be determined experimentally.…”

Section: Landward Slopementioning

confidence: 66%

“…The large scale model tests were used to (i) validate the results from the small scale model tests without scale effects (1 st phase) and (ii) to get model data on erosion and infiltration (2 nd phase, Möller et al 2002). All model tests in the large wave flume were performed for a 1:6 seaward slope and a 1:3 landward slope (Fig.…”

Section: Large Scale Model Testsmentioning

confidence: 99%

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Overtopping Flow Parameters on the Inner Slope of Seadikes

Schüttrumpf

Möller²,

Oumeraci³

2003

Coastal Engineering 2002

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Wave overtopping was responsible for many dike failures in the past. It is not feasible to avoid wave overtopping completely in the future due to uncertainties in the prediction of the design water levels and the costs of uneconomical high dikes. Therefore, wave overtopping has to be taken into account for the design of seadikes. The overtopping flow velocities and related layer thicknesses are required which are responsible for infiltration and erosion of the dike crest and the landward side of a dike. The objective of this paper is to study the flow velocities and related layer thicknesses associated with wave run-up and wave overtopping based on theoretical and experimental investigations.

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Section: Landward Slopementioning

confidence: 66%

Section: Large Scale Model Testsmentioning

confidence: 99%

Overtopping Flow Parameters on the Inner Slope of Seadikes

Schüttrumpf

Möller²,

Oumeraci³

2003

Coastal Engineering 2002

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“…The erosion resistance of green dike covers has been investigated in wave flumes, within in-situ tests on real dikes and with model tests on artificial research dikes or dike covers. For full-scale model tests in wave flumes, natural grass sods were excavated and installed onto the dike model [74,75].…”

Section: Erosion Resistance Against Overflow and Wave Overtoppingmentioning

confidence: 99%

“…Based on experience and supported by comprehensive laboratory and field studies [74,76,82], commonly grasses are used for dike vegetation (Figure 4, left) since a dense grass cover is known to provide sufficient surface protection against moderate hydraulic, climatic and mechanical loads [1]. Enhancements of the ecological value of the dike vegetation are possible by adapting the seeding mixtures towards species compositions that offer more food sources for flower-visiting insects or more carbon sequestration (Figure 4, right).…”

Section: Assurance Of Consistent Erosion Resistancementioning

confidence: 99%

Enhancing the Ecological Value of Sea Dikes

Scheres¹,

Schüttrumpf²

2019

Water

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Sea dikes protect low-lying hinterlands along many coasts all around the world. Commonly, they are designed as embankments with grass covers or grey revetments accounting for the prevailing hydraulic loads. So far, incorporation of ecological aspects in the dike design is limited. With regard to increasing environmental awareness and climate change adaptation needs, the present study reviews methods for ecological enhancement of sea dikes and discusses limitations and challenges related to these methods. In doing so, one key aspect is to maintain dike safety while increasing the ecological value. Potential for ecological enhancement of sea dikes has been found regarding natural or nature-based solutions in the foreshore, dike surface protection measures (vegetated dike covers, hard revetments and dike roads) and the dike geometry. While natural and nature-based solutions in the foreland are investigated thoroughly, so far only few experiences with ecological enhancements of the dike structure itself were gained resulting in uncertainties and knowledge gaps concerning the implementation and efficiency. Additional to technical uncertainties, engineers and ecologists meet the challenge of interdisciplinary collaboration under consideration of societal needs and expectations.

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“…In order to determine the direct impact of overtopping on the levee crown and backwall, some scholars have carried out a series of physical model tests. Möller et al (2003), through large-scale model test (no wave wall on the levee crown), analyzed and studied the process of damage to the backwall (made of diff erent clay materials) caused by overtopping, concluding that: (1) the erosion and permeability damage of backwalls begins with the levee crown; (2) when the grass cover is fully developed, erosion damage is more dominant than permeability damage; (3) single overtopping has no obvious impact on permeability damage, and the impact of the sustained action of overtopping is more important. Steendam et al (2010) systematically studied the formation of scour pits and the failure mechanism of earth dikes by conducting research on the parameters of overtopping water body on the levee body from both theoretical and experimental aspects.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on inner slope failure mechanism of seawall by coupling effect of storm surge and wave

et al. 2019

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In the context of global climate change, the impact of group-occurring ocean dynamic disasters on China's off shore areas is becoming more and more intense. The study of the eff ect of existing ocean dynamic disasters on off shore hazard-bearing bodies mostly focuses on the eff ect of single disaster-causing factors, and it is still insuffi cient to study storm surge and dynamic wave coupling & reinforcement eff ects as well as the process of the dynamic response of such hazard-bearing bodies as seawalls. This study fi rstly realized the synchronous process of water level and wave through continuous tide generation and wave generation by the wave maker and tide generating device, so as to realize the dynamic coupling simulation of storm surge and wave in the laboratory. Then the physical model test of the typical seawall section was carried out under the dynamic coupling of storm surge and wave as well as at a conventional fi xed water level respectively. In the process of test wave overtopping discharge and the damage process of the levee crown and backwall of seawalls were observed and compared, and their damage mechanism was also studied.

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Interaction of Wave Overtopping and Clay Properties for Seadikes

Cited by 7 publications

References 3 publications

Overtopping Flow Parameters on the Inner Slope of Seadikes

Overtopping Flow Parameters on the Inner Slope of Seadikes

Enhancing the Ecological Value of Sea Dikes

Experimental study on inner slope failure mechanism of seawall by coupling effect of storm surge and wave

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