scholarly journals PEMETAAN MORFOLOGI DASAR PERAIRAN UNTUK PEMANTAUAN SEDIMENTASI DI DERMAGA PERIKANAN ULEE LHEU MENGGUNAKAN SINGLE BEAM ODOMETER DUA FREKUENSI

2021 ◽  
Vol 14 (2) ◽  
pp. 143-148
Author(s):  
Guntur Adhi Rahmawan ◽  
Koko Ondara ◽  
Ilham Adnan
Keyword(s):  
Sea Level ◽  
Tidal Range ◽  
Water Type ◽  
Single Beam ◽  
Sediment Volume ◽  
A Value ◽  
Tidal Water ◽  
Loading And Unloading ◽  
Level Monitoring ◽  
Banda Aceh

ABSTRACTUlee Lheu Fishing Port Jetty is an important port in Banda Aceh City which functions as a crossing, loading and unloading port. The issue of sedimentation is the main problem. This study aims to determine the morphology of the seabed as the basis for monitoring sedimentation at the Ulee Lheu Fishing Port Jetty. Bathymetric surveys were carried out in the dock pool using a single beam echotrack odometer. Tides were obtained using the IOC Sea Level Monitoring for 29 days and analyzed using the admiralty method. The results of the processing showed that there was sedimentation in the area of the Ulee Lheu Fishing Port Jetty. The depth of the wharf pool ranges from 0-7,7 meters with a sediment volume of 250.117,15 m3. Meanwhile, the tidal water type is included in the double daily tidal type with a value of F = 0,15 and the tidal distance is 2,38 meters and is included in the micro tidal range category and there is sedimentation in the Ulee Lheu Fishing Port Jetty.Keywords: Bathymetry, sedimentation, morphology, Ulee Lheu Port, tidal rangeABSTRAKDermaga Perikanan Ulee Lheu merupakan pelabuhan penting di Kota Banda Aceh yang difungsikan sebagai pelabuhan penyeberangan maupun sebagai pelabuhan bongkar muat. Isu sedimentasi menjadi masalah utama di dermaga ini. Penelitian ini bertujuan untuk mengetahui morfologi dasar laut sebagai dasar pemantauan sedimentasi di Dermaga Perikanan Ulee Lheu. Survei batimetri dilakukan di kolam dermaga menggunakan echotrack odometer single beam. Pasang surut diperoleh menggunakan dari IOC Sea Level Monitoring selama 29 hari serta dianalisa menggunakan metode admiralty. Hasil pengolahan menunjukan terjadi sedimentasi di areal Dermaga Perikanan. Kedalaman kolam dermaga berkisar antara 0-7,7 meter dengan volume sedimen berkisar 250.117,15 m3. Sementara tipe pasang surut perairan termasuk dalam tipe pasang surut harian ganda dengan nilai F=0,15 serta jarak tunggang pasut sebesar 2,38 meter  dan termasuk dalam kategori mikro tidal range dan terdapat sedimentasi di bagian Dermaga Perikanan Ulee Lheu.Kata Kunci : Batimetri, Sedimentasi, Morfologi, Dermaga Perikanan Ulee Lheu, tunggang pasang surut

GNSS-Based Sea Level Monitoring

2007 ◽  
Vol 30 (4) ◽  
pp. 333-344
Author(s):  
Chai Ben-Michael ◽  
Gilad Even-Tzur
Keyword(s):  
Sea Level ◽  
Level Monitoring

scholarly journals Sea-level monitoring in the British Overseas Territories

2015 ◽  
Vol 8 (2) ◽  
pp. 123-132 ◽  
Author(s):  
Philip L. Woodworth ◽  
Angela Hibbert
Keyword(s):  
Sea Level ◽  
Overseas Territories ◽  
Level Monitoring

The Impact of Reference Environment Selection on the Exergy Efficiencies of Aerospace Engines

1999 ◽  
Author(s):  
Jason Etele ◽  
Marc A. Rosen
Keyword(s):  
Sea Level ◽  
Exergy Analysis ◽  
Operating Environment ◽  
A Value ◽  
Turbojet Engine ◽  
Reference Environment ◽  
The Impact

Abstract An exergy analysis is applied to a turbojet engine over a range of flight altitudes ranging from sea level to 15,000 m (∼50,000 ft), to examine the effects of using different reference-environment models. The results of this analysis using a variable reference environment (equal to the operating environment at all times) are compared to the results obtained using two constant reference environments (sea level and 15,000 m). The actual rational efficiency of the turbojet decreases with increasing altitude, ranging from a value of 16.9% at sea level to 15.3% at 15,000 m. In the most extreme cases considered, the rational efficiency value calculated using a constant reference environment varies by approximately 2% from the variable reference environment value.

scholarly journals ASSESSMENT OF SUSCEPTIBILITY TO SΕA-LΕVEL RISE IN THE COASTAL AREA OF PIERIA PREFECTURE

2017 ◽  
Vol 50 (3) ◽  
pp. 1721
Author(s):  
A. Mavromatidi ◽  
E. Karymbalis
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Accretion Rate ◽  
Vulnerability Index ◽  
Coastal Areas ◽  
Tidal Range ◽  
Coastal Vulnerability Index ◽  
Economic Significance ◽  
Very High

Tourism development in Greece has led to increasing pressure on coastal areas, which makes the study of sensitive coastal areas essential, in order to find appropriate solutions for their shielding. The aim of this study is an estimation of the effects of an anticipated sea level rise for the touristically developed part of Pieria Prefecture, which includes the settlements Paralia, Skala of Katerini, Olympic Beach, Korinos Beach and extends north to the area of the Kitrous saltworks and south to the mouth of Mavroneri river. Therefore the Coastal Vulnerability Index (CVI) is applied, in an attempt to determine the susceptible parts to the potential sea level rise. CVI depends on the following parameters: (a) coastal geomorphology, (b) coastal slope, (c) shoreline erosion/accretion rate, (d) relative sea-level rise fluctuations, (e) mean tidal range and (f) mean significant wave height. The classification of the coast, which is of particular socio-economic significance since it hosts urbanized areas, into five CVI classes (from very low vulnerability to very high vulnerability), showed that 43.6% of the entire coastline is of very high vulnerability. 

scholarly journals Improvements in Precise Orbits of Altimetry Satellites and Their Impact on Mean Sea Level Monitoring

2017 ◽  
Vol 55 (6) ◽  
pp. 3382-3395 ◽  
Author(s):  
Sergei Rudenko ◽  
Karl-Hans Neumayer ◽  
Denise Dettmering ◽  
Saskia Esselborn ◽  
Tilo Schone ◽  
...  
Keyword(s):  
Sea Level ◽  
Mean Sea Level ◽  
Level Monitoring

Saltmarshes in a time of change

2002 ◽  
Vol 29 (1) ◽  
pp. 39-61 ◽  
Author(s):  
Paul Adam
Keyword(s):  
Sea Level ◽  
Native Species ◽  
Rate Of Change ◽  
Tidal Range ◽  
Direct Result ◽  
Sea Level Changes ◽  
Ecological Value ◽  
Relative Sea Level ◽  
Global Sea Level ◽  
The Tropics

Saltmarshes are a major, widely distributed, intertidal habitat. They are dynamic systems, responding to changing environmental conditions. For centuries, saltmarshes have been subject to modification or destruction because of human activity. In this review, the range of factors influencing the survival of saltmarshes is discussed. Of critical importance are changes in relative sea level and in tidal range. Relative sea level is affected by changes in absolute sea level, changes in land level and the capacity of saltmarshes to accumulate and retain sediment. Many saltmarshes are starved of sediment because of catchment modification and coastal engineering, or exposed to erosive forces, which may be of natural origin or reflect human interference. The geographical distribution of individual saltmarsh species reflects climate, so that global climatic change will be reflected by changes in distribution and abundance of species, although the rate of change in communities dominated by perennial plants is difficult to predict. Humans have the ability to create impacts on saltmarshes at a range of scales from individual sites to globally. Pressures on the environment created by the continued increase in the human population, particularly in developing tropical countries, and the likely consequences of the enhanced greenhouse effect on both temperature and sea level give rise to particular concerns. Given the concentration of population growth and development in the coastal zone, and the potential sensitivity of saltmarsh to change in sea level, it is timely to review the present state of saltmarshes and to assess the likelihood of changes in the near (25 years) future. By 2025, global sea level rise and warming will have impacts on saltmarshes. However, the most extensive changes are likely to be the direct result of human actions at local or regional scales. Despite increasing recognition of the ecological value of saltmarsh, major projects involving loss of saltmarshes but deemed to be in the public interest will be approved. Pressures are likely to be particularly severe in the tropics, where very little is known about saltmarshes. At the local scale the cumulative impacts of activities, which individually have minor effects, may be considerable. Managers of saltmarshes will be faced with difficult choices including questions as to whether traditional uses should be retained, whether invasive alien species or native species increasing in abundance should be controlled, whether planned retreat is an appropriate response to rising relative sea level or whether measures can be taken to reduce erosion. Decisions will need to take into account social and economic as well as ecological concerns.

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