Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"Seawalls"”.
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MPM study of water wave interaction with porous seawalls
Flood defences are becoming increasingly vital for protecting key coastal infrastructure from rising sea levels and storm surge waves. Waves attenuate rapidly as they propagate through porous media, corresponding to significant energy dissipation. The ability of porous armour layers to absorb wave …
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Creating local landscape: tidal bores and seawalls at haining (1720s-1830s)
… at local politics. In this case I examine how seawalls, tidal phenomena, and scenes of daily life represented as Haining landscapes were collected and organized in local histories and imperially commissioned works. This dissertation thus seeks both to elucidate the historical relations between …
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Nature based solutions for coastal defense: Wave attenuation and economic analysis of marsh-fronted seawalls
A seawall fronted by salt marshes is a hybrid, nature-based solution for rural and urban coastal protection. A one-dimensional wave attenuation model was developed using first principles to capture four mechanisms that impact wave evolution: Wave breaking, vegetation drag, shoaling, and bed …
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Refinement of a Regional Storm Surge Mesh for High-Resolution Topographic Representation of Volusia County
… caused unprecedented coastal damage to dunes and seawalls. The extent of damage that occurred within Volusia and Flagler Counties during the 2022 hurricane season, the underrepresentation of this region within sustainability and resilience research, and the ecological, social, and economic value …
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AN EMPIRICAL STUDY OF FLOOD WAVE IMPACT PRESSURES TO DETERMINE THE EFFECTIVENESS OF NEW SEAWALL DESIGNS USING A DAM-BREAK APPROACH
… to reduce both their occurrence and severity. Seawalls of varying slopes with wave energy dissipaters to create various degrees of roughness on their surfaces have been proposed as a potential evolution in the design of coastal defences. This present study therefore aimed at investigating the …
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A comparison of durability and recruitment for reef mimics constructed from marine concrete and CaCO₃-enriched concrete
… Coastal and marine infrastructure, such as seawalls, breakwaters, have replaced natural intertidal, subtidal, and benthic habitats along many coastlines. Coastal infrastructure has a multitude of impacts on biodiversity and ecosystem functioning. The habitat provided by man-made coastal …
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The underscour of rubble mound breakwaters by wave action
Rubble mound seawalls, groins and breakwaters are still the most common type of shore-protection structures currently in use. Major reasons include: easiness to construct and repair, flexible with respect to settlement, favourable wave energy dissipation, fitness for any water depth and foundation, …
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Weathering the storms : new suburban typology for coastal cities through a case study on Winthrop, MA
… and internationally. Hard solutions such as seawalls and levees can be effective but they are expensive and potentially catastrophic in the event of failure. Soft solutions like dunes and living shorelines have stabilizing effects but they are moderate in their effectiveness and will not …
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Channel erosion projections for threatened Alaska-Native communities along the Kuskokwim River
… nature of building hardening structures like seawalls means that these villages adapt to the eroding river by moving their infrastructure away from the river, a process known as managed retreat. In this study, satellite images were used to calculate riverbank migration rates near three …
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The ecology and ecological enhancement of artificial coastal structures.
… options and improving water retention on seawalls by attaching artificial rock pools can improve diversity. The ecological enhancements attracted new species including mobile fauna which were previously absent and increased the overall diversity of the structures. To conclude the key …
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EPIBENTHIC INVERTEBRATES AND JUVENILE CHUM SALMON (ONCORHYNCHUS KETA) PREY AVAILABILITY ALONG AN ECO-ENGINEERED SHORELINE: A CASE STUDY AT THE SEAWALL IN SEATTLE, WASHINGTON
… and benefit shoreline dependent species. Seawalls and piers can reduce the quality and quantity of shallow water habitat available to out-migrating juvenile salmon (Oncorhynchus spp.) by deepening nearshore water and shading the shoreline environment. Previous studies along Seattle’s …
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Relationship between coastal vegetation biomass with elevation and salinity gradients
… defense approaches such as permanent levees, seawalls and gates. The effectiveness of marsh vegetation in attenuating storm surge energy and reducing soil erosion depends on the level of primary production at the time of the storm surge and the ability of marsh vegetation to recover rapidly …
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Convexity, Concavity, and Human Agency in Large-scale Coastline Evolution
… erosion), and hard structures (including seawalls and groynes). The results show that although both approaches have surprisingly long-range effects with spatially heterogeneous distributions, the pattern of shoreline changes attributable to a single local stabilization effort contrast …
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Wave impacts on rectangular structures
… point of view for engineers and designers of seawalls. The mathematical equations governing the fluid motion and its boundary conditions are presented. The deck problem together with the mathematical formulation and boundary conditions for the problem is presented in Chapters 5 and 6 by using …
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Ecological role of mining ponds in Southern Coastal Mines, Namibia
… and after mining is complete, areas behind the seawalls fill with seawater, creating a series of coastal marine ponds that have the potential to function as saline wetlands corresponding to closed estuaries. The study site lies north of the Orange River mouth, within the Tsau//Khaeb …
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Impacts of Hard Stabilization on the Shore of Yellowstone Lake, Yellowstone National Park, Wyoming, USA
… impacts associated with shore armor (i.e. seawalls and riprap) are a common topic within the coastal community. While many agree that the installation of these structures alters the shores geomorphic response, there is disagreement in the type and degree of response. Furthermore, studies …