scholarly journals A STUDY ON THE CONTERMEASURES FOR DUNE AND BEACH EROSION AROUND LARGE-SCALE COASTAL STRUCTURES

2011 ◽  
Vol 67 (2) ◽  
pp. I_1230-I_1235
Author(s):  
Shinji SATO ◽  
Erika WATANABE ◽  
Naoki YAO
Keyword(s):  
Large Scale ◽  
Beach Erosion ◽  
Coastal Structures

scholarly journals ANALYSIS OF BEACH EROSION AROUND LARGE-SCALE COASTAL STRUCTURES

1986 ◽  
Vol 1 (20) ◽  
pp. 171 ◽  
Author(s):  
T. Uda ◽  
M. Sumiya ◽  
Y. Kobayashi
Keyword(s):  
Large Scale ◽  
Beach Erosion ◽  
Aerial Photographs ◽  
Coastal Structures ◽  
Large Scale Structures ◽  
Spatial Changes ◽  
The Pacific ◽  
Median Diameter ◽  
The Pacific Ocean ◽  
Ibaraki Prefecture

The coast of Ibaraki Prefecture, facing the Pacific Ocean, has an alongshore stretch of 181 km. On this coast many structures associated with harbors have been constructed since early 1960s. Since then 25 years have passed, and some notable beach changes due to the influence of the construction of the coastal structures have been observed. This study aims to examine the actual situation of the beach change around large-scale structures and the damages of the coastal structures selecting the coast of Ibaraki Prefecture as the study area. For the purpose aerial photographs were taken along the coast, and the topographic surveys and measurements of median diameter of beach-face materials were made. Data of the soundings having been conducted once a year since 1975 around Oharai Port and Hazaki Fishery Harbor were collected in order to study the beach changes around the large-scale coastal structures. For the analysis of these data the comparison of the shoreline changes were performed by using four sets of aerial photographs since 1947 to the present. Moreover, temporal and spatial changes of the beach topography were investigated by the sounding data.

scholarly journals BACTON SANDSCAPING - BUILDING WITH NATURE TO SAFEGUARD THE UK'S GAS SUPPLY AND HELP COMMUNITIES ADAPT TO COASTAL CHANGE

2020 ◽  
pp. 15
Author(s):  
Jaap Flikweert ◽  
Christine Adnitt
Keyword(s):  
Large Scale ◽  
Beach Nourishment ◽  
Beach Erosion ◽  
Coastal Change ◽  
Erosion Risk ◽  
Natural Processes ◽  
Building With Nature ◽  
The Uk ◽  
Gas Supply

The Bacton Sandscaping scheme is a large-scale beach nourishment, designed to protect the Bacton Gas Terminal from cliff and beach erosion while also reducing flood and erosion risk to the communities of Bacton and Walcott, buying the time they need for adaptation to coastal change. The scheme was inspired by the even larger Dutch Zandmotor project, translating the concept to the different geography and governance setting of the UK - it can be seen as the Zandmotor's 'little nephew'. The term 'Sandscaping' was introduced to illustrate the large-scale and ambitious nature of the concept: work at a large scale, designing to work with natural processes and to achieve multiple objectives.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/FA3DjdCgKrk

Large-scale physical modeling of broken solitary waves impacting elevated coastal structures

2022 ◽  
pp. 1-21
Author(s):  
Clemens Krautwald ◽  
Hajo Von Häfen ◽  
Peter Niebuhr ◽  
Katrin Vögele ◽  
David Schürenkamp ◽  
...  
Keyword(s):  
Solitary Waves ◽  
Physical Modeling ◽  
Large Scale ◽  
Coastal Structures

scholarly journals Investigating beach erosion related with its recovery at Phra Thong Island, Thailand caused by the 2004 Indian Ocean tsunami

2019 ◽  
Author(s):  
Ryota Masaya ◽  
Anawat Suppasri ◽  
Kei Yamashita ◽  
Fumihiko Imamura ◽  
Chris Gouramanis ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Large Scale ◽  
Beach Erosion ◽  
Indian Ocean Tsunami ◽  
Human Populations ◽  
2004 Indian Ocean Tsunami ◽  
Quick Recovery ◽  
Sediment Deposits ◽  
Tsunami Sediment ◽  
2004 Tsunami

Abstract. The 2004 Indian Ocean Tsunami and the 2011 Great East Japan earthquake and tsunami caused large-scale topographic changes in coastal areas. Whereas much research has focused on coastlines that have or had large human populations, little focus has been paid on coastlines that have little or no infrastructure. The importance of examining erosional and depositional mechanisms of tsunami events lies in the rapid reorganisation that coastlines must undertake immediately after an event. Through understanding the precursor conditions to this reorganisation is paramount to the reconstruction of the coastal environment. This study examines the locations of sediment erosion and deposition during the 2004 Indian Ocean Tsunami event on the relatively pristine Phra Thong Island, Thailand. Coupled with satellite imagery, we use numerical simulations and sediment transportation models to determine the locations of significant erosion and the areas where much of that sediment was redeposited during the tsunami inundation and backwash processes. Our modelling approach confirms that beaches on Phra Thong Island were significantly eroded by the 2004 tsunami, predominantly during the backwash phase of the first and largest wave to strike the island. Although 2004 tsunami sediment deposits are found on the island, we demonstrate that most of the sediment was deposited in the shallow coastal area, facilitating quick recovery of the beach when normal coastal processes resume.

scholarly journals SHORELINE ROTATION CAUSED BY LARGE-SCALE EXCAVATION OF REEF FLAT ON SANUR BEACH IN BALI

2011 ◽  
Vol 1 (32) ◽  
pp. 93
Author(s):  
Masatoshi Endo ◽  
Akio Kobayashi ◽  
Takaaki Uda ◽  
Yasuhito Noshi ◽  
Susumu Onaka
Keyword(s):  
Numerical Simulations ◽  
Large Scale ◽  
Reef Flat ◽  
Beach Nourishment ◽  
Beach Erosion ◽  
Field Observations ◽  
Wave Direction ◽  
Bathymetric Survey ◽  
Shoreline Changes ◽  
S Model

In the southern part of Sanur Beach in Bali, beach erosion has occurred between groins after extensive beach nourishment, resulting in shoreline rotation between the groins. The cause of shoreline changes was investigated by field observations, including a bathymetric survey and the sampling of seabed materials, and numerical simulations of beach changes were carried out using Noshi et al.’s model. It was concluded that the shoreline rotation was triggered by the dredging of the reef flat, which caused a change in the wave direction on the reef flat due to the diffraction of waves.

scholarly journals ANALYSIS ON PERFORMANCE OF THE EMERGENCY NOURISHMENT PROJECT AT WEST BEACH OF BEIDAIHE, CHINA

2011 ◽  
Vol 1 (32) ◽  
pp. 98 ◽  
Author(s):  
Yanxiong Yang ◽  
Jiabo Zhang ◽  
Cuiping Kuang ◽  
Yu Zhang ◽  
Lulu He ◽  
...  
Keyword(s):  
Water Conservation ◽  
Large Scale ◽  
Beach Nourishment ◽  
Beach Erosion ◽  
Profile Measurement ◽  
Beach Profile ◽  
Survey Period ◽  
Before And After ◽  
Conservation Projects ◽  
Large Scale Project

Beach erosion is prevalent on China’s 18,000 km-long coastline, which has been aggravating due to urban development, river-damming and soil and water conservation projects since late 1970s. Beach erosion threatens the health of beaches of bathing places throughout the world. An effective way to defense the beach erosion is beach nourishment. In this paper, the study on an experimental beach nourishment project, which was conducted to provide data and experience for a large-scale project, was detailed. Field survey was conducted to study the performance of the project. Before and after the project, 8 monitoring profiles had been kept measuring along with the berm positions. The beach profile measurement indicates that after a little retreat the beach got relatively equilibrium, while the berm measurement shown a broadened intertidal zone getting stable eventually. In a word, the filled beach was eroded a little but finally got relatively stable in the survey period.

scholarly journals Investigating beach erosion related with tsunami sediment transport at Phra Thong Island, Thailand, caused by the 2004 Indian Ocean tsunami

2020 ◽  
Vol 20 (10) ◽  
pp. 2823-2841
Author(s):  
Ryota Masaya ◽  
Anawat Suppasri ◽  
Kei Yamashita ◽  
Fumihiko Imamura ◽  
Chris Gouramanis ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Large Scale ◽  
Tohoku Earthquake ◽  
Beach Erosion ◽  
Indian Ocean Tsunami ◽  
Human Populations ◽  
The 2011 Tohoku Earthquake ◽  
2004 Indian Ocean Tsunami ◽  
Quick Recovery ◽  
2004 Tsunami

Abstract. The 2004 Indian Ocean tsunami and the 2011 Tōhoku earthquake and tsunami caused large-scale topographic changes in coastal areas. Whereas much research has focused on coastlines that have or had large human populations, little focus has been paid to coastlines that have little or no infrastructure. The importance of examining erosional and depositional mechanisms of tsunami events lies in the rapid reorganization that coastlines must undertake immediately after an event. A thorough understanding of the pre-event conditions is paramount to understanding the natural reconstruction of the coastal environment. This study examines the location of sediment erosion and deposition during the 2004 Indian Ocean tsunami event on the relatively pristine Phra Thong Island, Thailand. Coupled with satellite imagery, we use numerical simulations and sediment transportation models to determine the locations of significant erosion and the areas where much of that sediment was redeposited during the tsunami inundation and backwash processes. Our modeling approach suggests that beaches located in two regions on Phra Thong Island were significantly eroded by the 2004 tsunami, predominantly during the backwash phase of the first and largest wave to strike the island. Although 2004 tsunami deposits are found on the island, we demonstrate that most of the sediment was deposited in the shallow coastal area, facilitating quick recovery of the beach when normal coastal processes resumed.

scholarly journals LONG TERM PERFORMANCE OF A SUBMERGED COASTAL CONTROL STRUCTURE: A CASE STUDY OF THE NARROWNECK MULTI-FUNCTIONAL ARTIFICIAL REEF

2012 ◽  
Vol 1 (33) ◽  
pp. 54 ◽  
Author(s):  
Angus Jackson ◽  
Rodger Tomlinson ◽  
Bobbie Corbett ◽  
Darrell Strauss
Keyword(s):  
Large Scale ◽  
Control Point ◽  
Artificial Reef ◽  
Beach Erosion ◽  
Gold Coast ◽  
Storm Events ◽  
Marine Habitat ◽  
Submerged Breakwater ◽  
Long Term Performance ◽  
Term Performance

In response to the increasing occurrences of beach erosion along Surfers Paradise and Main Beaches - Gold Coast, Australia, the Northern Gold Coast Beach Protection Strategy [NGCBPS] was developed to widen the beach by 20-30m as well as improving surfing conditions as a secondary objective. The strategy, implemented in 1999- 2000, involved large-scale beach nourishment and construction of a submerged breakwater “reef” to act as a control point at Narrowneck. Construction of the reef involved innovative filling and placement methods using very large sand filled geotextile containers coupled with significant advances with regards to design of the geotextile material and containers. In the 11 years since construction, there has been substantial monitoring of the project since its completion in late 2000 including: - video imaging using webcams; hydrographic and beach surveys; aerial and oblique photography; surf and surf safety observations and GPS surfing track plots; and geotextile container condition and stability. This paper presents an update on the performance of the reef over the last four years. In particular, the response of the structure and the shoreline to a series of major storm events in 2009 has been examined. The results have shown that the erosion caused by these major events was accommodated within the wider beach created in 1999. Over the next 2 years there was a gradual recovery in the lee of the reef with a subtle groyne effect resulting in an even larger increase in the width of the updrift beach. A detailed underwater condition survey was also undertaken in 2011, to determine changes in the condition of the geotextile containers. This revealed a number of containers missing or damaged, and that seaward containers were covered by sand. The marine habitat which has been a feature of the reef has been impacted by the increased coverage of sand, but still shows high abundance and biodiversity.

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