scholarly journals BEACH CHANGES ON SAGARA-SUZUKI COAST AND BEACH NOURISHMENT TO RECOVER SANDY BEACH

2016 ◽  
Vol 72 (2) ◽  
pp. I_817-I_822
Author(s):  
Jun-ichiro SATO ◽  
Hiromasa INABA ◽  
Kazutaka UCHIYAMA ◽  
Takaaki UDA ◽  
Toshinori ISHIKAWA ◽  
...  
Keyword(s):  
Sandy Beach ◽  
Beach Nourishment

scholarly journals BEACH EROSION ON GOLDEN BEACH IN SOUTH TAIWAN

2018 ◽  
pp. 46
Author(s):  
Chun-Hung Pao ◽  
Takaaki Uda ◽  
Yu-Hsiang Lin ◽  
Jia-Lin Julie Chen
Keyword(s):  
Sandy Beach ◽  
Beach Nourishment ◽  
Beach Erosion ◽  
Deposition Area ◽  
Sheltering Effect

Golden Beach in Taiwan is a sandy beach attracting many beachgoers because of its wide sandy beach and beautiful sunset. In recent years, this beach has been eroded. The cause of the beach erosion is considered to be due to the wave-sheltering effect of the Anping Harbor breakwaters constructed 4 km north of the beach. Now the restoration of sandy beach is underway by the construction of groins as well as beach nourishment using sand procured from the downcoast deposition area. This study aims to investigate the cause of the beach erosion of this beach to work out the effective measures against beach erosion.

Coastal Engineering Analysis, Field Measurements, Numerical Modeling and Design for the Optimized Extension of the Beach in Ras Al-Ardh Area, Salmiya, Kuwait

2019 ◽  
Author(s):  
S. Neelamani ◽  
Bassam N. Shuhaibar ◽  
Khaled Al-Salem ◽  
Yousef Al-Osairi ◽  
Qusaie E. Karam ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Sandy Beach ◽  
Field Measurements ◽  
Beach Nourishment ◽  
Beach Sand ◽  
Design Parameters ◽  
Model Study ◽  
Sea Bed ◽  
Waves And Currents ◽  
Tourism Enterprises

Abstract Maintaining and retaining a quality sandy beach is a primary requirement for attracting people and tourists in any coastal country. Tourism Enterprises Company (TEC) in Kuwait owns 230 m long sandy beach in Ras Al-Ardh Sea Club, Salmiya, Kuwait. The beach has been eroding because of strong hydrodynamics forces from waves and currents. TEC wants to develop a stable sandy beach of 30 m wide. Kuwait Institute for Scientific Research (KISR), Kuwait is assigned to carry out the required scientific studies. In order to make sure a stable quality beach will exist, KISR has carried out the needed studies, which involves the field measurements such as bbathymetry survey, current and tidal variations, physical characteristics of beach soil, beach and sea bed profile, establishing the design parameters such as waves, currents, tide and wind. Hydrodynamic model study using DELFT3D model for the present and for the proposed extended groin conditions with beach nourishment were carried out. Also numerical modeling using GENESIS model to understand the future shore line changes due to the proposed development was carried out. Design of Groins to estimate the weight of armor units and weight of inner layers were carried out. The particle size and quantity of sand needed for reclamation of 30 m wide beach was estimated. Based on the study, it is recommended that the sandy soil to be used for 30 m wide beach nourishment should have D50 greater than 0.42 mm (say 0.5 mm) and D10 greater than 0.25 mm. The borrow pit much be selected by keeping this soil characters in mind. It is recommended to use a submerged offshore breakwater in order to retain the beach sand in place and for reducing the maintenance nourishment. Otherwise, large quantity of the capital nourished beach sand will escape into the deeper water due to strong current coupled with waves and steep seabed slopes. Environmental Impact Study was carried out as per Kuwait Environment Public Authority requirements to bring out the impacts due to beach filling and the construction submerged offshore barrier and extension of east groin for a distance of 30 m. TEC will implement the recommendations for developing the beach in Ras Al-Ardh sea club and will be useful to attract more people to use this beach.

scholarly journals EXPERIMENTAL STUDY ON THE EFFECTS OF THE OFFSHORE NOURISHMENT USING THE COASER SANDS WITH THE CROSS-SHORE SEASONAL CHANGE

2012 ◽  
Vol 1 (33) ◽  
pp. 38
Author(s):  
Yoko Shibutani ◽  
Yuhei Matsubara ◽  
Masamitsu Kuroiwa ◽  
Noriko Yao
Keyword(s):  
Experimental Study ◽  
Seasonal Change ◽  
Laboratory Experiments ◽  
Sandy Beach ◽  
Beach Nourishment ◽  
The World ◽  
The Cross ◽  
Sand Nourishment ◽  
Study Laboratory

In recent decades, beach erosions have become severe at sandy beach in the world. The coarser sand nourishment has been noticed in Japan because of the stabilization of the beach coast. However the performance is not clear. Therefore in this study, laboratory experiments were conducted for the beach nourishment using the coarser sand. Through of this experiment, the effect of the coarser sand nourishment was investigated.

scholarly journals Recovery of Sandy Beach on Takata-matsubara Coast in Iwate Prefecture by Beach Nourishment

2013 ◽  
Vol 69 (2) ◽  
pp. I_731-I_735 ◽  
Author(s):  
Takaaki UDA ◽  
Yukiyoshi HOSHIGAMI ◽  
Kazuya SAKAI ◽  
Yasuhito NOSHI
Keyword(s):  
Sandy Beach ◽  
Beach Nourishment ◽  
Iwate Prefecture

scholarly journals FORMATION OF DYNAMICALLY STABLE LAKESHORE UNDER SEASONALLY CHANGING WAVE DIRECTION

2011 ◽  
Vol 1 (32) ◽  
pp. 85
Author(s):  
Toshinori Ishikawa ◽  
Takaaki Uda ◽  
Toshiro San-nami ◽  
Shusuke Watanabe
Keyword(s):  
Numerical Simulation ◽  
Sandy Beach ◽  
Beach Nourishment ◽  
Lake Kasumigaura ◽  
Wave Direction ◽  
Spur Dike ◽  
Oblique Wave ◽  
The Stability ◽  
Wave Incidence

In the Ukishima region of Lake Kasumigaura, beach nourishment along with the construction of groins has been carried out to recover a sandy beach. After the beach nourishment, part of the nourishment sand was transported away from the beach, turning around the tip of the downcoast groin owing to the oblique wave incidence in winter. To enhance the stability of the beach, the groins were extended and a spur dike was constructed. To design these structures, a numerical simulation using the BG model was carried out, and the optimum shapes were determined by taking into account the seasonally changing wave direction. The effectiveness of the spur dike was numerically evaluated using the BG model.

scholarly journals DISAPPEARANCE OF SANDY BEACH ON HON CHONG BEACH IN NHA TRANG AND ITS RECOVERY BY BEACH NOURISHMENT

2018 ◽  
Vol 74 (2) ◽  
pp. I_683-I_688
Author(s):  
Akio KOBAYASHI ◽  
Takaaki UDA ◽  
Ryuhei MIYATA ◽  
Yasuhito NOSHI
Keyword(s):  
Sandy Beach ◽  
Beach Nourishment

scholarly journals Laboratory Investigation on the Evolution of a Sandy Beach Nourishment Protected by a Mixed Soft–Hard System

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1171 ◽  
Author(s):  
Alessandra Saponieri ◽  
Nico Valentini ◽  
Marcello Di Risio ◽  
Davide Pasquali ◽  
Leonardo Damiani
Keyword(s):  
Sediment Transport ◽  
Sandy Beach ◽  
Surf Zone ◽  
Drainage System ◽  
Beach Nourishment ◽  
Mixed Solution ◽  
Shoreline Retreat ◽  
Submerged Breakwater ◽  
Positive Effects ◽  
The Mean

A new experimental campaign on a 2D movable-bed physical model, reproducing a typical nourishment sandy beach profile, is being carried out in the wave flume of the Laboratory of Coastal Engineering at Politecnico di Bari (Bari, Italy). The main aim is to assess the short-term evolution of a sandy beach nourishment, relying on a mixed solution built on the deployment of a Beach Drainage System (BDS) and a rubble-mound detached submerged breakwater. This paper aims at illustrating the experimental findings. Tests presented herein deal with both unprotected and protected configurations, focusing on the hydrodynamic and morphodynamic processes under erosive conditions. Results show that, with respect to the unprotected conditions, BDS reduces the shoreline retreat and the beach steepen within swash and surf zone as well. Moreover, a reduction of net sediment transport rate is observed. When BDS is coupled with the submerged sill, a reversal of the prevalent direction of the net sediment transport seaward occurs offshore the sheltered region. Less considerable positive effects on shoreline retreat are induced by the submerged structure, whereas the mean beach slope remains quite stable. Secondary effects of drain on the submerged sill performance are also highlighted. BDS reduces wave-induced setup on beach, by mitigating the mean water level raising, typically experienced by such structures.

scholarly journals Evaluation of beach nourishment works on Miyazaki coast in Japan

2019 ◽  
Vol 276 ◽  
pp. 04001
Author(s):  
Keisuke Murakami ◽  
Khusnul Setia Wardani
Keyword(s):  
Sandy Beach ◽  
Beach Nourishment ◽  
Research Area ◽  
Sediment Supply ◽  
Severe Erosion ◽  
Nearshore Currents

Miyazaki Coast have been suffering from severe erosion problem due to the shortage of sediment supply from rivers and the change of waves and nearshore currents by the construction of an offshore breakwater at Miyazaki Port. In order to reproduce a wide sandy beach, a beach nourishment project has been done since 2008 in combination with the installation of Sand-Packed containers that were placed in front of dune. A certain volume of nourishment sand has been installed for the sand fill works that cover Sand-Packed containers, and the rest has been dumped off the coast. The purpose of this research is to evaluate the effectiveness of beach nourishment works with using long-term bottom sounding data. This study discussed the effect of the beach nourishment on longshore sandbar evolution. The change of the sand volume in research area was also discussed in this study.

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