Problems on sea water intake and discharge facilities in coastal region

Desalination ◽  
1977 ◽  
Vol 22 (1-3) ◽  
pp. 159-168 ◽  
Author(s):  
Shunya Iso
Keyword(s):  
Water Intake ◽  
Sea Water ◽  
Coastal Region

scholarly journals Female reproductive biology and spawning periodicity of two species of king prawns, Penaeus longistylus Kubo and Penaeus latisulcatus Kishinouye, form Queensland's East Coast Fishery

1988 ◽  
Vol 39 (6) ◽  
pp. 729 ◽  
Author(s):  
AJ Courtney ◽  
MCL Dredge
Keyword(s):  
Egg Production ◽  
East Coast ◽  
Sea Water ◽  
Coastal Region ◽  
Ovary Development ◽  
Commercial Catch ◽  
Ovary Weight ◽  
Species Population ◽  
Spawning Periodicity ◽  
Catch Rates

In the coastal region of central Queensland female red-spot king prawns, P. longistylus, and the western or blue-leg king prawns, P. latisulcatus, had high mean ovary weights and high proportions of advanced ovary development during the winter months of July and August of 1985 and 1986. On the basis of insemination, both species began copulating at the size of 26-27 mm CL, but P. longistylus matured and spawned at a smaller size than P. latisulcatus. Abundance of P. longistylus was generally three to four times greater than that of P. latisulcatus but the latter was subject to greater variation in abundance. Low mean ovary weight and low proportions of females with advanced ovaries were associated with the maximum mean bottom sea-water temperature (28.5�C) for both species. Population fecundity indices indicated that peaks in yolk or egg production (a) displayed a similar pattern for both species, (b) varied in timing from year to year for both species and (c) were strongly influenced by abundance. Generally, sample estimates of abundance and commercial catch rates (CPUE) showed similar trends. Differences between the two may have been due to changes in targeted commercial effort in this multi-species fishery.

scholarly journals Kajian Potensi Air Tanah Berdasarkan Data Geolistrik Resistiviti Untuk Antisipasi Kekeringan Di Wilayah Pesisir Kangkung, Kabupaten Kendal, Privinsi Jawa Tengah

2017 ◽  
Vol 20 (1) ◽  
pp. 35 ◽  
Author(s):  
Sugeng Widada ◽  
Alfi Satriadi ◽  
Baskoro Rochaddi
Keyword(s):  
Groundwater Quality ◽  
Ground Water ◽  
Coastal Area ◽  
Sea Water ◽  
Coastal Region ◽  
Pumping Test ◽  
Dry Season ◽  
Sea Water Intrusion ◽  
Groundwater Exploitation ◽  
Water Intrusion

Coastal Region of Kangkung, Kendal Regency, Central Java Province is one of the areas that experiencing water in the dry season. Groundwater exploitation is one way solution to meet the water needs for people in the area, especially in the dry season. Therefore it is necessary to study potency of ground water in coastal area of Kangkung. The research was  conducted to determine the potential of ground water in the confined aquifer in the Coastal Region of Kangkung, Kendal District which is expected to be utilized as a source of water to meet the needs of local communities. The method used in this research is  descriptive analysis to describe the condition of aquifer, however some things are delivered quantitatively. The aquifer condition was obtained from the interpretation of geoelectricity (resistivity) data supported by geological and hydrogeological observation data and pumping test data as secondary data. Groundwater quality analysis and simple hydrochemical analysis is with Chlorida - Bicarbonat Ratio (CBR) method to know the possibility of sea water intrusion. The results showed that the aquifer in the coastal area of Kangkung has the potential of 29.13 lt / sec ground water discharge which can be utilized to meet the needs of clean water 18,800 people. Although it is adjacent to the sea, the groundwater in the study area does not undergo sea water intrusion. Groundwater quality in this location is qualified as raw drinking water according to SK Menkes No, 492/Menkes/Per/IV2010 tentang Persyaratan Kualitas Air Minum. Keywords: ground water, geoelectric, intrusion  Wilayah Pesisir Kangkung, Kabupaten Kendal Provinsi Jawa Tengah merupakan salah satu daerah yang pada musim kemarau mengalami kekeringan. Pemanfaatan air tanah merupakan salah satu cara untuk memenuhi kebutuhan air bagi masyarakat di daerah tersebut, terutama pada musim kemarau. Oleh karena itu perlu dilakukan kajian potensi air tanah di daerah Pesisir Kangkung tersebut. Penelitian ini bertujuan untuk mengetahui potensi air tanah pada akuifer dalam (tertekan) di Wilayah Pesisir Kangkung, Kabupaten Kendal yang diharapkan dapat dimanfaatkan sebagai sumber air bersih untuk memenuhi kebutuhan masyarakat setempat. Metode penelitian yang digunakan dalam penelitian ini adalah diskriptis analisis untuk menggambarkan kondisi akuifer, namun demikian beberapa hal disampaikan secara kuantitatif. Kondisi akuifer diperoleh dari hasil interpretasi data geolistrik resistiviti dengan didukung data hasil pengamatan geologi dan hidrogeologi serta data sekunder berupa hasil pumping test. Analisa kualitas air tanah dan analisis hidrokimia secara sederhana dengan metode Chlorida – Bicarbonat Ratio (CBR) dilakukan untuk mengetahui kemungkinan terjadinya intrui air laut. Hasil penelitian menujukan bahwa akuifer di daerah Pesisir Kangkung mempunyai potensi debit air tanah 29,13 lt/det yang dapat dimanfaatkan untuk memenuhi kebutuhan air bersih 18.800 orang. Meskipun berbatasan dengan laut, namun air tanah di daerah kajian tidak mengalami  terintrusi air laut. Kualitas air tanah di lokasi ini memenuhi syarat sebagai bahan baku air minum sesuai SK Menkes No, 492/Menkes/Per/IV2010 tentang Persyaratan Kualitas Air Minum. Kata Kunci : air tanah, geolistrik, intrusi

How to Increase the Capacity of an Existing Sea Water Intake

2007 ◽  
Author(s):  
Said Mazaheri ◽  
Zeynab Sabouri Shargh
Keyword(s):  
Water Intake ◽  
Current Velocity ◽  
Power Plants ◽  
Sea Water ◽  
Flow Line ◽  
Gas Field ◽  
Cooling Systems ◽  
Northern Shore ◽  
The Persian Gulf

Sea Water Intakes supplying water for desalination, cooling systems, or other parts of many important industrial components, such as refineries, and power plants are usually built in the shore lines and close to the target systems. In some conditions, such as expansion of the refinery, or other plants and in order to avoid building a new sea water intake because of lack of the suitable land or expending a lot of money, it is required to enhance the amount of withdrawing water and increase the capacity of the existing sea water intake. In such conditions, several important factors such as, minimum required submergence depth for the pumps, maximum allowed current velocity at the entry of the suction chambers, maximum allowed current velocity inside the intake and near the filters, and the flow pattern should be checked. In this paper, it is tried to describe these factors and restrictions. In addition, a case study sea water intake located in South Pars Gas Field at the northern shore line of the Persian Gulf in the province of Boushehr, Iran, is considered and the mentioned factors and restrictions for increasing the capacity of sea water intake from 25,000 to 35,000 is discussed. Besides, a hydraulic mathematical model has been used to check the flow line of the developed system. At the end the results are discussed.

FLNG Cold Sea Water Intake Risers

2014 ◽  
Author(s):  
Ange Luppi ◽  
David Mayau
Keyword(s):  
Water Intake ◽  
Sea Water

scholarly journals MENGHITUNG BERAT BANDUL UNTUK MENGGERAKKAN BUTTERFLY VALVE (UV-7209) DI SEA WATER INTAKE DALAM MENCEGAH BACK PRESSURE PADA POMPA (G-7201) PADA KONDISI BLACKOUT

2021 ◽  
Vol 18 (01) ◽  
Author(s):  
Jerry Eka Mukti ◽  
Zulkifli . ◽  
Zulfikar .
Keyword(s):  
Water Intake ◽  
Sea Water ◽  
Back Pressure ◽  
Butterfly Valve

Air laut disuplai langsung dari lautan lepas menggunakan media pompa jenis submersible yang pada bagian discharge memliki tekanan 5,57 kg/cm2 dengan debit 11.600 m3/h melalui pipa 48” menuju pipa 66” dalam distribusinya ke berbagai unit. Dengan kapasitas tersebut, digunakan sebuah alat pengaman sistem distribusi, yang berguna untuk dapat menahan aliran balik dari sistem menuju discharge pompa pada kondisi listrik mati (blackout). Sebuah valve dengan menggunakan flange seberat 700  kg  dan  actuator  berupa  couter  weight  dengan  massa  933,334  kg  sebagai pemutus aliran mampu menahan aliran balik dengan daya 5621,564 hd, kecepatan 2,134  m/s  dan  tekanan  5,57  kg/cm2.  Pada kondisi  blackout  actuator  akan  jatuh kebawah  yang  menimbulkan  daya  sebesar  20,774  hp  untuk  menutup  90%  dan 20,517 hp untuk menutup penuh. Dari hasil daya tersebut maka valve akan membutuhkan waktu menutup 11,696 s pada 90% dan 14,349 s pada posisi full close.  Dengan   waktu   yang   diperoleh   maka   penggunaan   valve   masih   layak digunakan.Keyword : Air laut, blackout, counter weight, massa, daya.

New sea water intake filtration system

Desalination ◽  
1991 ◽  
Vol 82 (1-3) ◽  
pp. 281-301
Author(s):  
Muftah M. Elarbash
Keyword(s):  
Water Intake ◽  
Sea Water ◽  
Filtration System
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