scholarly journals Swash zone dynamics of a sandy beach with low tide terrace during variable wave and tide conditions

2016 ◽  
Author(s):  
Luis Pedro ALMEIDA ◽  
Rafael ALMAR ◽  
Patrick MARCHESIELLO ◽  
Rachid BENSHILA ◽  
Kevin MARTINS ◽  
...  
Keyword(s):  
Sandy Beach ◽  
Swash Zone

scholarly journals EFFECTS OF SEASONAL VARIATIONS ON SANDY BEACH GROUNDWATER TABLE AND SWASH ZONE SEDIMENT TRANSPORT

2014 ◽  
Vol 1 (34) ◽  
pp. 59
Author(s):  
Norasman Othman ◽  
Ahmad Khairi Abd Wahab ◽  
Mohamad Hidayat Jamal
Keyword(s):  
Sediment Transport ◽  
Seasonal Variations ◽  
Sandy Beach ◽  
Groundwater Table ◽  
Swash Zone

scholarly journals ASPEK PERTUMBUHAN UNDUR-UNDUR LAUT, Hippa adactyla DARI PANTAI BERPASIR KABUPATEN KEBUMEN

2013 ◽  
Vol 13 (2) ◽  
Author(s):  
Ali Mashar Dan Yusli Wardiatno
Keyword(s):  
Growth Pattern ◽  
Sustainable Management ◽  
Sandy Beach ◽  
Biological Information ◽  
Swash Zone ◽  
Area Method ◽  
The World ◽  
Biological Component ◽  
Swept Area ◽  
Ecology And Economy

ABSTRAKUndur-undur laut atau mole crab merupakan komponen penting dari komunitas makrobentos di pantaiberpasir terbuka, baik di daerah tropis maupun bermusim empat di seluruh dunia.Undur-undur lautmempunyai fungsi ekonomi dan ekologi.Salah satu jenis undur-undur laut yang banyak dijumpai diIndonesia adalah jenis Hippa adactyla.Karena fungsi ekonomi dan ekologi undur-undur laut pentinguntuk dilestarikan, salah satu informasi penting yang dibutuhkan adalah pola pertumbuhan undurundurlaut.Penelitian dilakukan di Pantai Bocor, Kecamatan Buluspesantren, KabupatenKebumen.Pengambilan sampel undur-undur laut dilakukan setiap bulan dari bulan Maret hingga Mei2012, yang dilakukan dengan metode penyapuan dengan bantuan alat tangkap sorok pada daerahpantai berpasir yang terpengaruh gerakan gelombang (swash zone) (swept area method).Hasilpenelitian menunjukkan bahwa undur-undur laut Hippa adactyla yang tertangkap mempunyai kisaranpanjang karapas antara 15 mm hingga 40 mm, dengan ukuran yang paling banyak tertangkap beradapada selang panjang karapas 24-26 mm.Nisbah kelamin undur-undur laut di lokasi penelitianmendekati 1 (1,035) atau tergolong seimbang, dimana jumlah undur-undur laut jantan relatif seragamdengan undur-undur laut betina.Kondisi ini juga menunjukkan bahwa kondisi populasi undur-undurlaut di lokasi penelitian relatif stabil. Pola pertumbuhan undur-undur laut Hippa adactylaseluruhnya,baik jantan, betina, maupun gabungan, adalah isometrik, artinya pertambahan panjang undur-undurlaut relatifsama dengan pertambahan bobotnya.Kata kunci: Hippa adactyla, pantai berpasir, undur-undur lautABSTRACTMole crabs are one of important biological component among macrobenthos communityinhabiting sandy beach, both in tropic or temperate area all over the world. They playsignificant ecology and economy role in their habitat. One of Indonesian mole crabs is Hippaadactyla. Due to its ecological and economical function of the crab, it is neede to study thepopulation growth pattern for biological information based sustainable management. One ofimportant biological information is growth pattern. The research was conducted in PantaiBocor, Kecamatan Buluspesantren, Kabupaten Kebumen. Sample collections were donemonthly during March – May 2012. Sampling was done by swep area method by means oflocal fishermen gear called sorok along swash zone. The results showed that the carapacelength of collected crabs ranged from 19 – 34 mm, with the highest abundance within range of29 – 30 mm. Female dominated the sex ratio. The F/M ratio was 0.244. The growth pattern ofmale was isometric, while in female it was negative allometric. However, combining datashowed that the growth patern of the population was negative allometric, so its length growsfaster than its weight.Keywords: Hippa adactyla, sandy beach, mole crab, southern part of Jawa

scholarly journals High-resolution, large-scale laboratory measurements of a sandy beach and dynamic cobble berm revetment

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Chris E. Blenkinsopp ◽  
Paul M. Bayle ◽  
Daniel C. Conley ◽  
Gerd Masselink ◽  
Emily Gulson ◽  
...  
Keyword(s):  
Large Scale ◽  
Sandy Beach ◽  
Wave Transformation ◽  
Intermediate Water ◽  
Swash Zone ◽  
Laboratory Measurements ◽  
Large Wave ◽  
Water Level Rise ◽  
Wave Flume ◽  
Spatio Temporal

AbstractHigh quality laboratory measurements of nearshore waves and morphology change at, or near prototype-scale are essential to support new understanding of coastal processes and enable the development and validation of predictive models. The DynaRev experiment was completed at the GWK large wave flume over 8 weeks during 2017 to investigate the response of a sandy beach to water level rise and varying wave conditions with and without a dynamic cobble berm revetment, as well as the resilience of the revetment itself. A large array of instrumentation was used throughout the experiment to capture: (1) wave transformation from intermediate water depths to the runup limit at high spatio-temporal resolution, (2) beach profile change including wave-by-wave changes in the swash zone, (3) detailed hydro and morphodynamic measurements around a developing and a translating sandbar.

scholarly journals A “feet digging” swash zone sampling method for the sandy beach bivalve Donax deltoides (Bivalvia: Donacidae)

2019 ◽  
Author(s):  
Stephen Totterman
Keyword(s):  
Sampling Method ◽  
Sandy Beach ◽  
Low Cost ◽  
Sampling Unit ◽  
Recreational Fishing ◽  
Swash Zone ◽  
Length Frequency ◽  
Frequency Distributions ◽  
Eastern Australia ◽  
Zone Sampling

ABSTRACTA “feet digging” method for sampling the sandy beach bivalve Donax deltoides was evaluated by comparison to quadrat-based results from eleven beaches in subtropical eastern Australia. The method was developed from a recreational fishing technique that involves twisting one’s feet into the thixotropic sand to dislodge buried clams which are then recovered by hand. Several plots are sampled across the swash zone in one five-minute sampling unit and the process is replicated at several locations along the beach. Mean feet digging clam counts were proportional to mean transect linear clam densities (r = 0.98). Clam length-frequency distributions from feet digging were similar to those from quadrat sampling except that feet digging was not effective for clams < 16 mm. Feet digging counts are sensitive to both across shore (tidal) and alongshore variation in clam abundance and were less precise than those from quadrat-based methods (CV 1.2× larger). However, feet digging is fast and the method should be useful for low cost surveys of Donax deltoides and similar “surf clams”.

scholarly journals ASPEK PERTUMBUHAN UNDUR-UNDUR LAUT, Emerita emeritus DARI PANTAI BERPASIR KABUPATEN KEBUMEN

2013 ◽  
Vol 13 (1) ◽  
Author(s):  
Ali Mashar Dan Yusli Wardiatno
Keyword(s):  
Growth Pattern ◽  
Sustainable Management ◽  
Carapace Length ◽  
Sandy Beach ◽  
Biological Information ◽  
Swash Zone ◽  
Male And Female ◽  
Combining Data

ABSTRAKUndur-undur laut merupakan bagian dari kelompok krustasea yang menghuni pantai berpasirdi daerah intertidal.Undur-undur laut mempunyai fungsi ekonomi dan ekologi.Salah satu jenisundur-undur laut yang banyak dijumpai di Indonesia adalah jenis Emerita emeritus.Mengingatpentingnya fungsi ekonomi dan ekologi undur-undur laut, maka kajian tentang polapertumbuhan undur-undur laut penting dilakukan sebagai dasar untuk mengelola pemanfaatanundur-undur laut secara lestari.Penelitian ini dilakukan di Pantai Bocor, KecamatanBuluspesantren, Kabupaten Kebumen.Pengambilan sampel undur-undur laut dilakukan setiapbulan dari bulan Maret hingga Mei 2012.Pengambilan sampel undur-undur laut dilakukandengan metode penyapuan dengan bantuan alat tangkap sorok pada daerah pantai berpasiryang terpengaruh gerakan gelombang (swash zone).Hasil penelitian menunjukkan bahwaundur-undur laut Emerita emeritus yang tertangkap mempunyai kisaran panjang karapasantara 19 mm hingga 34 mm, dengan ukuran yang paling banyak tertangkap pada selangpanjang 29-30 mm. Undur-undur laut di lokasi penelitian didominasi oleh undur-undur lautbetina dengan nisbah kelamin jantan/betina adalah 0,246.Pola pertumbuhan undur-undur lautEmerita emeritus jantan adalah isometrik, sedangkan undur-undur laut betina adalahalometrik negatif.Secara keseluruhan, pola pertumbuhan undur-undur laut Emerita emeritusadalah alometrik negatif. Artinya pertumbuhan panjang undur-undur laut lebih cepatdibanding pertumbuhan bobotnyaKata kunci: Emerita emeritus, pantai berpasir, undur-undur laut, selatan JawaABSTRACTMole crab is one of crustaceans inhabiting sandy intertidal. The crabs has both ecological andeconomical significance role. One common mole crab found in Indonesia is Emerita emeritus.Due to its ecological and economical function of the crab, it is neede to study the populationgrowth pattern for biological information based sustainable management. The research wasconducted in Pantai Bocor, Kecamatan Buluspesantren, Kabupaten Kebumen. Samplecollections were done monthly during March – May 2012. Sampling was done by swep areamethod by means of local fishermen gear called sorok along swash zone. The results showedthat the carapace length of collected crabs ranged from 19 – 34 mm, with the highestabundance within range of 29 – 30 mm. In terms of sex, female were the dominant with sexratio beween male and female was 0.246. The growth pattern of male was isometric, while infemale it was negative allometric. However, combining data showed that the growth patern ofthe population was negative allometric; meaning that its length grows faster than its weight.Keywords: Emerita emeritus, sandy beach, mole crab, southern part of Jawa

Swash zone moisture dynamics and unsaturated infiltration in two sandy beach aquifers

2014 ◽  
Vol 143 ◽  
pp. 20-31 ◽  
Author(s):  
James W. Heiss ◽  
William J. Ullman ◽  
Holly A. Michael
Keyword(s):  
Sandy Beach ◽  
Swash Zone ◽  
Moisture Dynamics

Estimating swash zone friction coefficients on a sandy beach

2001 ◽  
Vol 43 (1) ◽  
pp. 25-40 ◽  
Author(s):  
Jack A. Puleo ◽  
K.Todd Holland
Keyword(s):  
Sandy Beach ◽  
Swash Zone ◽  
Friction Coefficients

scholarly journals Burrowing Time of the Three Indonesian Hippoid Crabs After Artificial Dislodgment

2016 ◽  
Vol 21 (3) ◽  
pp. 135
Author(s):  
Yusli Wardiatno ◽  
Yuyun Qonita ◽  
Agus Alim Hakim
Keyword(s):  
Indian Ocean ◽  
Carapace Length ◽  
Sandy Beach ◽  
Sediment Surface ◽  
Swash Zone ◽  
Target Species ◽  
Large Wave ◽  
Intertidal Sand ◽  
Sandy Coast ◽  
Sandy Habitat

Three species of hippoid crabs are the target species of intertidal fishery along coastal line in District Cilacap, south Java; namely Emerita emeritus, Hippa adactyla and Albunea symmista. In Adipala sandy beach, Cilacap  an experiment was conducted to reveal the burrowing time and velocity of the crabs. The experiment was performed by removing the crabs from their burrows, measuring their carapace length, and releasing them immediately on the substrate. Burrowing time was measured from the start of burrowing to the disappearance of the entire carapace under the sediment surface. Among the three species, E. emeritus had the fastest burrowing time. As a consequence in terms of velocity, the burrowing velocity of Albunea symmista was higher than that of Hippa adactyla and Emerita emeritus; meaning that with the same size A. symmista needs longer time to burrow. By evaluating with other previous studies, the burrowing time and burrowing velocity of the three sand crabs were comparable. The ability of fast burrowing in the three species seems likely to be the advantage for their survival in large wave disturbed coarse sandy habitat and for their ability to widely exist along the sandy coast of south Java. Keywords: behavior; Indian ocean; intertidal; sand crab; south Java; swash zone

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