Anthropogenic effects on shoreface and shoreline changes: Input from a multi-method analysis, Agadir Bay, Morocco

Aouiche, Ismail; Daoudi, Lahcen; Anthony, Edward J.; Sédrati, Mouncef; Ziane, E.; Harti, Abderrazak El; Dussouillez, Philippe

doi:10.1016/j.geomorph.2015.11.013

Cited by 47 publications

(17 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The beach at T3 was significantly eroded in December 2013 before the breakwater was constructed by the government to protect the coastline. The ability of the breakwater to the wave diffraction process, consequently formed a new beach shape (Aouiche et al, 2016). Absence of vegetation on the beach dune at T3 further indicated that transect was actively disturbed.…”

Section: Beach Profilementioning

confidence: 99%

“…The area behind the jetty-type breakwater at Tok Jembal, however, displayed a positive +8 m accretion. According to Saengsupavanich (2013), Aouiche et al (2016) and Prukpitikul et al (2018), the jetty-type breakwater (or detached breakwaters) is able to reduce storm-associated energy, such as strong currents and waves, which has resulted in sediment accretion behind the breakwater.…”

Section: Shoreline Changesmentioning

confidence: 99%

See 1 more Smart Citation

Evaluating the Effects of Beach Nourishment on Littoral Morphodynamics at Kuala Nerus, Terengganu (Malaysia)

Ariffin¹,

Zulfakar²,

Redzuan³

et al. 2020

J. Sustain. Sci. Manage.

View full text Add to dashboard Cite

Since 2008, Kuala Nerus has undergone rapid urbanization along its coastline, resulting in the loss of sand along the littoral zone. Due to the heavy erosion in 2012 at Tok Jembal beach that migrated to Universiti Malaysia Terengganu (UMT) beach in 2013, the Department of Irrigation and Drainage has implemented a coastal defence project to mitigate erosion by building a series of ripraps/revetments along the coasts. Additionally, breakwaters and groyne structures were built in combination with beach nourishment programme. For the sustenance of the local fishermen community, the Malaysia Public Works Department replaced one of the breakwaters to a jetty-type breakwater at Tok Jembal beach. Shoreline evaluations, beach profile measurements and numerical modelling were used in this present study to identify the effectiveness of combining the coastal defence and beach nourishment programmes. The combination of programmes successfully initiated the accretion of a ~30 m beach dune and created new beaches. However, erosion remains persistent in the beach that was unprotected and exposed directly to the South China Sea. We posit that a combination of coastal defence and beach nourishment programmes can potentially interrupt dynamic coastal processes, especially the current parameters.

show abstract

Section: Beach Profilementioning

confidence: 99%

Section: Shoreline Changesmentioning

confidence: 99%

Evaluating the Effects of Beach Nourishment on Littoral Morphodynamics at Kuala Nerus, Terengganu (Malaysia)

Ariffin¹,

Zulfakar²,

Redzuan³

et al. 2020

J. Sustain. Sci. Manage.

View full text Add to dashboard Cite

show abstract

“…The digitizing error (E d ) was calculated as the standard deviation of differences of the shoreline position between three repeated digitizations [44] and it was estimated within the range of ±0.8 m to ±2.3 m. The pixel error (E p ) was identified as the pixel size of an image [44], ranging from ±0.34 m to ±0.67 m in satellite images and from ±1.6 to 1.8 m in aerial photographs. The tidal error (E t ), being the horizontal movement of shoreline position due to vertical fluctuations of tides, was estimated as the ratio of tidal amplitude to beach slope [14]. Thus, the "total shoreline position error (E sp )" expressed as the root sum of the squares of errors [43] E sp = ± E …”

Section: Analysis Of Shoreline Evolutionmentioning

confidence: 99%

“…Coastal areas are highly dynamic and changeable systems affected by a number of natural and anthropogenic forcing factors, such as wind and waves directional change [1,2], currents [3,4], sea-level fluctuations [5,6], sediment budget [7,8], topography [9,10], tectonics [11,12], presence of coastal infrastructures, and sand extraction [13,14]. The results of the above processes can cause variations of shore morphology in long and short time spans, and therefore it can impact the coastal environmental quality, socioeconomic value, security of beaches and harbours, and natural resources [15].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Shoreline Displacements and Coastal Morphodynamic Pattern of North Rhodes Island, Greece

Gad

Hatiris

Loukaidi

et al. 2018

Water

View full text Add to dashboard Cite

Shoreline evolution and seabed morphology changes depend on coastal geomorphology as well as hydrodynamics of the nearshore region. This study investigates the morphological evolution of the northernmost headland of Rhodes Island, Greece, using a method that combines historical shoreline evolution analysis and numerical modelling of coastal processes. The satellite and aerial imagery analysis under a GIS platform reveals that, since 1982, the overall surface area of the backshore has slightly increased, though in shorter period times, large variations have been identified. The part of the beach that is most prone to extreme changes is the spit-like formation at the tip of the headland. Wind-generated waves and induced currents are the main forcing factors that affect the shape and orientation of the spit-like beach. This spit-like morphology changes seasonally due to variations in the dominant wave regime. West sector waves cause sediment deposition at the eastern sector of the spit-like formation, whereas strong southeast wave events during the winter favor accretion at the west sector, inducing an asymmetrical shape. Thus, the analysis results indicate an annual balance in sediment transport.

show abstract

“…Kıyı şeridi; deniz, tabii ve suni göl ve akarsuların veya bir su kütlesinin kenarının kara ile birleşmesi ile oluşan çizgi olarak tanımlanmaktadır. Kıyı şeridi boyunca meydana gelen değişiklikler temel olarak insan, iklim ve doğal afet kaynaklı olmaktadır (Aouiche et al, 2016;French, 2001;Pardo-Pascual et al, 2012). Ayrıca, tabii ve suni göllerdeki kıyı şeridinin ani olarak değişimi, tarım ve hayvancılık için gereksiz su kullanımı, göl çevresinde meydana gelen hızlı kentleşme, turistik yapılaşma, ormansızlaştırma faaliyetleri gibi antropojenik faaliyetler sonucu meydana gelmektedir (Du et al 2001, Yan et al 2002, Penny and Kealhofer 2005, Legesse and Ayenew 2006, Kiage et al 2007, Aykut 2019.…”

Section: Introductionunclassified

Burdur Gölü Kıyı Şeridindeki Değişiminin Uzaktan Algılama ile Haritalanması

Sabuncu¹

2020

Afyon Kocatepe University Journal of Sciences and Engineering

View full text Add to dashboard Cite

Burdur Gölü, Türkiye'nin güneybatısındaki Isparta ve Burdur illeri arasında yer almaktadır.Tektonik kökenli ve alkali yapıda olan Burdur gölünün suyu tuzludur. Göl aynı zamanda birçok farklı kuş türü için önemli sulak alan için Ramsar alanı olarak belirlenmiştir. Bu çalışmanın temel amacı, Burdur Gölü'nün kıyı şeridinin yıllar içindeki konumsal değişimlerini uzaktan algılama yaklaşımları kullanarak analiz etmektir. Bu amaç doğrultusunda dört adet çok zamanlı Landsat 5 TM ve Landsat 8 OLI uydu görüntüleri çalışmanın uygulama safhasında kullanılmıştır. Belirli bir zaman aralığında ve bölgede meydana gelen değişimleri izlemek için, En çok benzerlik ve Destek Vektör Makinesi (DVM) gibi piksel tabanlı görüntü sınıflandırmasını kullanmak, belirtilen zaman aralığı arasındaki değişiklikleri doğru bir şekilde izlemek için etkili bir yoldur. Piksel tabanlı sınıflandırma uygulamalarının yanı sıra, su kütlesi alanının çıkarılması ve bu alanların CBS platformunda sayısallaştırılması için Modifiye Normalize Fark Su İndeksi (MNDWI) kullanılmıştır. Tüm sınıflandırma sonuçları ile MNDWI indis sonuçları Burdur Gölü'nün su yüzey alanı % 40'ını kaybettiğini ve Burdur Gölü'nün toplam alanının 1986'da 206 km 2 iken şu anda 125 km 2 olduğunu göstermiştir. Uygulanan uzaktan algılama yöntemleri ile Burdur Gölünün 1986-2019 yılları arasında yüzey alanında önemli bir azalma eğilimi olduğu görülmektedir.

show abstract

Anthropogenic effects on shoreface and shoreline changes: Input from a multi-method analysis, Agadir Bay, Morocco

Cited by 47 publications

References 35 publications

Evaluating the Effects of Beach Nourishment on Littoral Morphodynamics at Kuala Nerus, Terengganu (Malaysia)

Evaluating the Effects of Beach Nourishment on Littoral Morphodynamics at Kuala Nerus, Terengganu (Malaysia)

Long-Term Shoreline Displacements and Coastal Morphodynamic Pattern of North Rhodes Island, Greece

Burdur Gölü Kıyı Şeridindeki Değişiminin Uzaktan Algılama ile Haritalanması

Contact Info

Product

Resources

About