Arus sejajar pantai

Arus sejajar pantai atau arus susur pantai (bahasa Inggris: longshore current) adalah serangkaian proses geologis yang menyebabkan terjadinya perpindahan sedimen (seperti tanah liat, lanau, kerikil, atau pasir) di sepanjang garis pantai. Gelombang atau angin yang datang dengan sudut kemiringan tertentu akan menghasilkan arus yang bergerak sejajar dengan garis pantai. Arus ini normalnya terbentuk di zona selancar. Proses perpindahan sedimen akibat arus ini dikenal dengan nama ingsutan litoral (longshore drift atau littoral drift).^[1]^[2]

Pasir pantai juga secara langsung dapat berpindah akibat gelombang maupun angin yang datang dengan sudut kemiringan tertentu. Ketika gelombang miring tersebut pecah, maka pasir akan terdorong ke darat dengan sudut kemiringan tertentu. Pasir tersebut kemudian terbawa oleh air yang surut tegak lurus terhadap garis pantai. Apabila proses ini terjadi secara berulang-ulang, maka pasir pantai akan bergerak semakin jauh dari tempat asalnya, bahkan dengan laju belasan meter per hari..

Referensi

Catatan kaki

^ Gomez-Pina G (2002) "Sand dune management problems and techniques, Spain", Journal of Coastal Research, Iss 36: 325–332.
^ Sunarto (2008). "Hakikat Bencana Kepesisiran dalam Perspektif Geomorfologi dan Upaya Pengurangan Risikonya" (PDF). Jurnal Kebencanaan Indonesia. 1 (4): 211–228. Diarsipkan dari versi asli tanggal 2020-06-01.

Buku

Bruun, Per, ed. (2005). Port and coastal engineering developments in Science and technology. South Carolina: P. Bruun.
Hart, D.E; Marsden, I; Francis, M (2008). "Chapter 20: Coastal systems". Dalam Winterbourne, M; Knox, G.A.; Marsden, I.D.; Burrows, C. Natural history of Canterbury (edisi ke-3rd). Canterbury University Press. hlm. 653–684.
Reeve, D; Chadwick, A; Fleming, C (2004). Coastal engineering-processes, theory and design practice. New York: Spon Press.

Artikel ilmiah

Kirk, R.M; Lauder, G.A (2000). "Significant coastal lagoon systems in the South Island, New Zealand". Science for Conservation. DOC 46p: 13–24.
Michel, D; Howa, H.L (1997). "Morphodynamic behaviour of a tidal inlet system in a mixed-energy environment". Physics and Chemistry of the Earth. 22 (3–4): 339–343. Bibcode:1997PCE....22..339M. doi:10.1016/s0079-1946(97)00155-9.
Peterson, D; Deigaard, R; Fredsoe, J (July 2008). "Modelling the morphology of sandy spits". Coastal Engineering. 55 (7–8): 671–684. doi:10.1016/j.coastaleng.2007.11.009.
Soons, J.M; Schulmeister, J; Holt, S (April 1997). "The Holocene evolution of a well nourished gravelly barrier and lagoon complex, Kaitorete "Spit", Canterbury, New Zealand". Marine Geology. 26 (1–2): 69–90. Bibcode:1997MGeol.138...69S. doi:10.1016/S0025-3227(97)00003-0.

Pranala luar

Foto, animasi, dan penjelasan untuk siswa sekolah, geography-site.co.uk
Intranet.lissjunior.hants.sch.uk memiliki animasi singkat mengenai arus sejajar pantai
USGS — Coastal Erosion on Cape Cod, woodshole.er.usgs.gov
Shore drift, ecy.wa.gov
Longshore drift in South Carolina, cofc.edu

l b s Oseanografi fisik
Ombak	Teori gelombang Airy Skala Ballantine Ketidakstabilan Benjamin–Feir Aproksimasi Boussinesq Gelombang pecah Clapotis Gelombang knodial Gelombang laut persegi Dispersi Gelombang ekuatorial Gelombang gravitasi Hukum Green Gelombang infragravitasi Gelombang internal Bilangan Iribarren Gelombang Kelvin Gelombang kinematik Arus sejajar pantai Prinsip variasi Luke Tegangan radiasi Gelombang raksasa Gelombang Rossby Keadaan laut Seiche Tinggi gelombang signifikan Soliton Lapisan batas Stokes Pergeseran Stokes Gelombang Stokes Gelombang alun Gelombang trochoidal Tsunami megatsunami Bilangan Ursell Dasar gelombang Tinggi gelombang Ketidaklinearan gelombang Energi ombak Radar gelombang Pendangkalan gelombang Turbulensi gelombang Interaksi gelombang dan arus Gelombang di perairan dangkal Persamaan Saint-Venant dimensi satu Persamaan perairan dangkal ombak Model
Sirkulasi	Sirkulasi atmosfer Baroklinitas Arus batas Gaya Coriolis Gaya Coriolis–Stokes Gaya vorteks Craik–Leibovich Downwelling Eddy Batas Ekman Spiral Ekman Transpor Ekman El Niño–Osilasi Selatan Arus geostropik Global Ocean Data Analysis Project Arus Teluk Sirkulasi halotermal Arus Humboldt Sirkulasi hidrotermal Sirkulasi Langmuir Arus Loop Arus laut Dinamika laut Pusaran samudra Pemodelan Princeton Arus pecah Arus subpermukaan Keseimbangan Sverdrup Sirkulasi termohalin berhenti Upwelling Arus akibat angin Pusaran air World Ocean Circulation Experiment
Pasang laut	Titik amphidromic Pasang Bumi Head of tide Internal tide Lunitidal interval Perigean spring tide Arus pecah Rule of twelfths Slack water Tidal bore Gaya pasang surut Energi pasang surut Tidal race Tunggang pasang surut Tidal resonance Tide gauge Tideline Teori pasang laut
Bentang alam	Abyssal fan Dataran abisal Atol Bathymetric chart Geografi pesisir Cold seep Continental margin Continental rise Landas benua Lubuk Contourite Guyot Hidrografi Cekungan samudra Oceanic plateau Palung samudra Passive margin Dasar laut Gunung bawah laut Lembah bawah laut Gunung api bawah laut
Tektonika lempeng	Batas divergen Batas konvergen Fracture zone Ventilasi hidrotermal Geologi kelautan Mid-ocean ridge Mohorovičić discontinuity Hipotesis Vine–Matthews–Morley Kerak samudra Outer trench swell Ridge push Pemekaran lantai samudra Slab pull Slab suction Slab window Subduksi Pergeseran sesar Busur vulkanik
Zona samudra	Air laut dalam Laut dalam Litoral Mesopelagik Oceanic Pelagik Fotik Selancar Basah
Permukaan laut	Deep-ocean Assessment and Reporting of Tsunamis Global Sea Level Observing System North West Shelf Operational Oceanographic System Sea-level curve Kenaikan permukaan laut Sistem Geodesi Dunia
Acoustics	Deep scattering layer Hidroakustik Tomografi akustik kelautan Bom sofar Saluran SOFAR Akustik bawah air
Satelit	Jason-1 Jason-2 (Ocean Surface Topography Mission) Jason-3
Terkait	Argo Benthic lander Warna air DSV Alvin Energi laut Pencemaran laut Mooring National Oceanographic Data Center Samudra Penjelajahan samudra Ocean observations Ocean reanalysis Ocean surface topography Ocean thermal energy conversion Oseanografi Outline of oceanography Pelagic sediment Sea surface microlayer Sea surface temperature Air laut Science On a Sphere Termoklin Underwater glider Kolom air World Ocean Atlas
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