Bibliografie tematiche / West Beach (S. Aust.)

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Letteratura scientifica selezionata sul tema "West Beach (S. Aust.)"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 19 febbraio 2022

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Articoli di riviste sul tema "West Beach (S. Aust.)"

Harianto, Harianto, Arie Antasari Kushadiwijayanto e Apriansyah Apriansyah. "Physical Oceanography Condition in Eastern Karimata Strait: Pasir Mayang Beach West Kalimantan". Jurnal Penelitian Fisika dan Aplikasinya (JPFA) 8, n. 1 (30 giugno 2018): 51. http://dx.doi.org/10.26740/jpfa.v8n1.p51-60.

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Karimata strait is located in the western Indonesian, separate the Kalimantan and Belitung island, that has an important role for the distribution services. The information about its dynamics such as tidal behavior, and wave is the key to support the navigation activities in this area. This research describes the results of measurements of the physical oceanography parameter on the eastern side of the Karimata Strait, Pasir Mayang Beach. The tidal data were measured for 15 days in February 25th – March 12th, 2017 and sea current were observed for 24 hours on February 27-28th, 2017. The result showed that tidal type in this area is diurnal tide with amplitude of M2, S2, K1, and O1 respectively are 0.085 m, 0.086 m, 0.455 m, and 0.342 m. Significant wave’s high is ranged from 0.12 – 0.31 m with significant period of 5.32-6.9 s. The wave direction is south western. The current velocity is ranged from 0.087- 0.112 m/s and average current velocity is 0.092 m/s. The tidal current direction is northeast at low tide and south western at high tide. This study also reveals important information that wave energy variability is not only affected by seasonal conditions but also influenced by tides. The tides have responsibility to change the propagation medium of wave that is originated dispersive to non-dispersive medium. This study opens a new study of correction of wave measurement procedures by including and taking into account the effects of tides.

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Subiyanto, Subiyanto, Nira na Nirwa, Yuniarti Yuniarti, Yudi Nurul Ihsan e Eddy Afrianto. "Numerical Model of Current Speed in Bojong Salawe Beach, Pangandaran West Java Province". International Journal of Global Operations Research 2, n. 1 (13 febbraio 2021): 17–23. http://dx.doi.org/10.47194/ijgor.v2i1.40.

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The purpose of this study was to determine the hydrodynamic conditions at Bojong Salawe beach. The method used in this research is a quantitative method, where numerical data is collected to support the formation of numerical models such as wind, bathymetry, and tide data. The hydrodynamic model will be made using Mike 21 with the Flow Model FM module to determine the current movement pattern based on the data used. In the west monsoon with a maximum instantaneous speed of 0.04 - 0.08 m/s, while in the east monsoon it moves with a maximum instantaneous speed of 0,4 – 0,44 m/s. The dominant direction of current movement tends to the northeast. The results indicate the current speed during the east monsoon is higher than the west monsoon. The difference in the current speed is also influenced by the tide conditions; higher during high tide and lower during low tide. Monsoons also have a role in the current movements, though the effect is not very significant.

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POULOS, S., e G. CHRONIS. "Coastline changes in relation to longshore sediment transport and human impact, along the shoreline of Kato Achaia (NW Peloponnese, Greece)". Mediterranean Marine Science 2, n. 1 (1 giugno 2001): 5. http://dx.doi.org/10.12681/mms.271.

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Coastal configuration depends upon the equilibrium between available sediment budget and prevailing nearshore wave and current conditions. Human activities often disturb this natural equilibrium by altering the sources of beach material and littoral drift pattern. In the coastal zone of NW Peloponnese, an essentially tideless environment, the oblique approach of wind-induced waves implies an overall longshore drift from east to west. On an annual basis, the potential longshore sediment transport rates at the different sections of the study area (Kato Achaia) is estimated to vary between 0.02 10-3 m3/s and 5 103 m3/s and to fluctuate seasonally. The construction of a port and the extraction of aggregates from the R. Peiros have changed significantly the pattern of sediment transport inducing dramatic changes on coastline configuration; thus, the part of the coastline west to the port had retreated as much as 70 m eliminating a touristic beach, while the entrance of the port was silted inhibiting navigation. Coastal engineering measures, such as modification of port-breakwaters and construction of groins have had only minimal contribution in beach recovery. Hence, coastal management plans should consider this dynamic equilibrium and protect the natural coastal system from the arbitrary human activities.

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Ari Guner, H. Anil, Cihan Sahin, Yalcin Yuksel e Esin Cevik. "NUMERICAL INVESTIGATION OF THE IMPACT OF A GROIN SYSTEM ON SHORELINE EVOLUTION". Coastal Engineering Proceedings, n. 35 (23 giugno 2017): 3. http://dx.doi.org/10.9753/icce.v35.sediment.3.

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The South-west Black Sea Coast is facing severe erosion problems that threaten both the population and the immediate eastside properties. Some locations, such as the Karaburun region, are especially vulnerable. In an attempt to reverse the present erosional trend, a coastal defense scheme involving a groin system was introduced in a phased manner. In the present work, the shoreline changes under the influence of a groin system of a sandy beach in Karaburun, Turkey, are studied by using a numerical simulation model (LITPACK). The work is motivated by the considerable erosion and siltation problems caused a sediment deposition near and inside the harbor entrance which prevented the boat traffic and caused a vital problem for the harbor operations. The studyâ€™s scope is two-fold: to help in understanding the dynamics of the beach based on results of the field work and to study the responses of this beach by numerical simulation, utilizing the topographic and sediment field data and measured wave data. The validation and verification of the numerical model was performed by RTK-GPS measurements and satellite images.

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Agarwal, Arpit, Josh Carter, Matt Campbell e Hugo Bermudez. "DEVELOPMENT OF DYNAMIC SEDIMENT BUDGET TO PREDICT FUTURE SHORELINE POSITIONS ON A SAND LIMITED SHORELINE IN LOUISIANA". Coastal Engineering Proceedings 1, n. 33 (15 dicembre 2012): 104. http://dx.doi.org/10.9753/icce.v33.sediment.104.

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A shoreline change analysis was performed along the shoreline of the chenier plain in southwestern Louisiana in an attempt to forecast future shoreline position and to determine the performance of a proposed sand beach nourishment project along the shoreline which extends 14 km west of the western jetty of Calcasieu Pass, Louisiana and runs through the community of Holly Beach, Louisiana. Observations of shoreline morphology revealed a solitary sediment wave traversing the project site from east to west since the 1960’s. The genesis of the sediment wave is unknown and is unexplored in this work. The presence of the sediment wave masked the long-term shoreline change rates along the project site and therefore biased the predictions of future shoreline positions due to the transient nature of the sediment wave morphology. Standard coastal engineering methods used to predict future shoreline positions include simple translation of the shoreline based on measured shoreline change rates (referred to herein as historical linear progression or HLP) and one-line numerical models. For the project site, due to the presence of this sediment wave the HLP approach to predict future shoreline positions is not applicable. One-line shoreline morphology models such as the US Army Corps of Engineer's GENESIS model require the assumption that the beach profile can be represented by an equilibrium beach profile which was developed for sand rich shorelines. The project site profile composition of a sandy veneer extending to a depth of approximately -1.2 to -2 m over a muddy bottom violates this assumption, and therefore the traditional one-line model cannot be applied. Therefore, a dynamic sediment budget (DSB) method was developed to predict future shoreline positions based on available historical data, longshore transport rates, known morphological processes, statistical estimates of storm events, beach nourishment diffusion, and a relationship between volume change and shoreline change based on existing profile composition. This method was validated with existing data and was able to predict 20 years of morphology within ±15 m of measured shoreline positions.

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Santoso, Karina, I. Dewa Nyoman Nurweda Putra e I. Gusti Bagus Sila Dharma. "Studi Hindcasting Dalam Menentukan Karakteristik Gelombang dan Klasifikasi Zona Surf Di Pantai Uluwatu, Bali". Journal of Marine and Aquatic Sciences 5, n. 1 (10 settembre 2018): 119. http://dx.doi.org/10.24843/jmas.2019.v05.i01.p15.

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Bali is one of the islands where there are many surf zones with various characteristics. In addition, Bali is also a heaven with a classy wave for the surfers of the world. One of the most challenging places to surf in Bali is Uluwatu Beach. Uluwatu Beach is ranked the 3rd best surf spot in the world version of CNN Travel in 2012. Wind causes sea waves, therefore wind data can be used to estimate the height and direction of the waves. Wave Hindcasting with Sverdrup, Munk and Bretschneider (SMB) method is calculated based on wind data for 10 years (2001 - 2010) from BMKG Ngurah Rai Station - Denpasar to obtain a significant wave height and period. In this research, it is necessary to approach through Hindcasting procedure, wave transformation analysis and surfing Terminology in determining the type of breaking wave and classification of surf zone in Uluwatu Beach area. Wave calculation result in Uluwatu Beach dominated by wave that coming from west side with significant wave height (Hs) of 0.98 m and significant wave period (Ts) of 5.21 s. The wave height due to the influence of wave refraction and shoaling is 0.976 m. The breaking wave height obtained from the calculation is 1.04 m at a depth of 0.849 m. From the result in this research, it can be concluded that the breaking wave type that occurred at Uluwatu Beach is plunging type according to the calculation result from its Irribaren number (0.4 <Ni <2.3). The classification of the surf zone at Uluwatu Beach based on its breakup type of wave is thought to be a good zone for surfers on intermediate level.

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Bremec, Claudia, Cecilia Carcedo, M. Cintia Piccolo, Eder dos Santos e Sandra Fiori. "Sabellaria nanella(Sabellariidae): from solitary subtidal to intertidal reef-building worm at Monte Hermoso, Argentina (39°S, south-west Atlantic)". Journal of the Marine Biological Association of the United Kingdom 93, n. 1 (4 settembre 2012): 81–86. http://dx.doi.org/10.1017/s0025315412000550.

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This contribution reports the first record of intertidal reefs built by the sabellariid wormSabellaria nanellain the lower intertidal at Monte Hermoso beach, Argentina (39°S). All previous records ofS. nanellain the study area correspond to solitary individuals from shallow subtidal depths in coastal environments, while the present findings refer to well established reefs on stony rocks. Worms sort medium size sand grains to build the reefs, which contain higher amount of organic matter than the surrounding sediments. Size structure of worms shows multiple size cohorts that include recent recruits and mature adults. Many invertebrates, i.e. various annelids, arthropods, molluscs, nemerteans and nematodes, are the frequent organisms living within the reef, some of them already recorded in the area. The presence of intertidal reefs ofS. nanellaindicates that the species has plasticity to adapt to environments with different physical conditions (subtidal–intertidal areas).

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Prihandana, Pande Komang Egar, I. Dewa Nyoman Nurweda Putra e Gede Surya Indrawan. "Struktur Vegetasi Mangrove berdasarkan Karakteristik Substrat di Pantai Karang Sewu, Gilimanuk Bali". Journal of Marine Research and Technology 4, n. 1 (28 febbraio 2021): 29. http://dx.doi.org/10.24843/jmrt.2021.v04.i01.p05.

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Karang Sewu Beach is one of the areas in the West Bali National Park (TNBB) which has a natural mangrove ecosystem. One of parameters affecting mangrove growth is substrate. This research aims to determine the vegetation structure, substrate characteristics, and different vegetation groups of mangroves based on its substrate characteristics in Karang Sewu Beach. This study collected the data on vegetation structure using a plotted line method with 2x2, 5x5, 10x10 and 20x20 meters transects. Substrate texture was analyzed using a pipette method while total organic material was analyzed using the Loss on Ignition (LOI) method. Mangrove vegetation was categorized based on substrate characteristics using the descriptive quantitative method. Results showed there were nine species of mangrove found in Karang Sewu Beach, namely Ceriops tagal, Sonneratia alba, S. caseolaris, Rhizophora apiculata, R. mucronata, R. stylosa, R. lamarckii, Lumnitzera racemosa, and Avicennia marina. INP in the first station was dominated by R. apiculata for tree levels (152,88 %), pole (174,24 %), sapling (139,04 %), and seedling (111,48 %). R. lamarckii dominated the second station with a tree level value of 226,94 % while C. tagal dominated for pole level (220,82 %), sapling (243,65 %), and seedling (182,94 %). INP in the third stasion was dominated by C. tagal for pole level (103,68 %), sapling (98,77 %) and seedling (95,51 %). Mangrove substrate in Karang Sewu Beach was characterized as having a sand like texture, dusty loam, sandy loam, loamy sand, and sandy clay with moderate organic matter (2.44 %) to low (0.79 %). Mangrove vegetation grouping based on substrate characteristics in Karang Sewu Beach was different in general. A. marina is found in the middle zone, where this species is usually found in the front zone.

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Murray, John W. "Wind transport of foraminiferal tests into subaerial dunes: an example from western Ireland". Journal of Micropalaeontology 28, n. 2 (1 novembre 2009): 185–87. http://dx.doi.org/10.1144/jm.28.2.185.

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Abstract. INTRODUCTIONThe empty tests of dead foraminifera behave as sedimentary particles and are subject to transport, although their different shapes and effectively low density means that their hydraulic equivalence is greater than that of spherical quartz grains (see Haake, 1962). Their estimated traction velocities range from c. 4 cm s−1 to c. 13 cm s−1 (Snyder et al., 1999). The presence of calcareous foraminiferal tests in a fossil sedimentary deposit would normally be taken as an indication of deposition in a marine environment. However, it has long been known that wind can transport tests from a carbonate beach into adjacent carbonate dunes as in Dogs Bay, Connemara, Eire (Murray, 1973) and Abu Dhabi, Persian Gulf (Murray, 1970). The purpose of this Notebook is to provide some details of the Dogs Bay occurrence and to comment on how such deposits might be recognized in the rock record.In western Ireland the coastal geology consists of hard rocks, yet the beaches are commonly composed primarily of calcareous bioclastic sands (Guilcher & King, 1961; Keary, 1967). Dogs Bay (Lat. 53° 24′ N Long. 9° 58′ W) lies on the west-facing side of a tombola which is approximately 200 m wide and 400 m long. The tombola is made up of sand dunes that are mainly vegetated except along the margins adjacent to the beaches. Dogs Bay is exposed to Atlantic storms and the surface layer of the beach is reworked on each tidal cycle. Both the beach and the dunes are composed of . . .

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Dibajnia, Mohammad, Dave Anglin e Rob Nairn. "LARGE SCALE SHORELINE PROTECTION WITH MINIMIZED DOWNDRIFT IMPACT, COTONOU, WEST AFRICA". Coastal Engineering Proceedings, n. 36 (30 dicembre 2018): 41. http://dx.doi.org/10.9753/icce.v36.structures.41.

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Benin is a country in West Africa with a little more than 120 kilometers of coastline. The main port at Cotonou serving the country of Benin was completed in 1963. According to Dibajnia and Nairn (2004), Beninâ€™s coastline experiences incessant wave attack causing a longshore sand transport rate in the order of 1 million m3 per year (moving from west to east). The port facility initially blocked the full amount of sand transported along the shore, resulting in accumulation of a large beach on the updrift (west) side of the port and corresponding dramatic erosion of the downdrift (east) shoreline consisting of over 400 m of shoreline retreat by 2003 (i.e. over approximately 40 years). Additionally, since 1998 sand started to bypass around the harbor breakwater into the entrance channel. Harbor entrance channel dredging requirements was escalating with almost 1.5 million m3 dredged between 1998 and 2002. At the time of port construction, the downdrift erosion was not a concern as the area was largely undeveloped. However, with the inevitable expansion of the city of Cotonou towards the east, the ongoing erosion started to destroy newly developed residential and commercial areas.

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Più fonti

Tesi sul tema "West Beach (S. Aust.)"

Quinn, Jason Matthew. "The adequacy of project based EIA for a complex coastal development : the Glenelg/West beach study". Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09ENV/09envq44.pdf.

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Loo, Maylene G. K. "Effects of wastewater effluent on macrobenthic infaunal communities at Christies Beach, South Australia /". Title page, table of contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phl8625.pdf.

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Loo, Maylene G. K. (Maylene Geok Kuan). "Effects of wastewater effluent on macrobenthic infaunal communities at Christies Beach, South Australia". 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phl8625.pdf.

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Includes bibliographical references (leaves 136-154) Aims to determine the effects of an outfall discharging secondarily treated wastewater effluent on benthic communities at Christies Beach with the specific objectives of: characterising the physical, biological and chemical environment of Gulf St Vincent and the study area region; ascertaining the extent to which effluent outfall has affected the macrobenthic infaunal community structure; characterising the structure of macrobenthic infaunal communities in the near shore water of the Adelaide metropolitan coast; and, determining the functional response through measurements of sediment community respiration to these changes.

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Libri sul tema "West Beach (S. Aust.)"

Lefevre, Carol. Quiet City: Walking in West Terrace Cemetery. Wakefield Press Pty, Limited, 2016.

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