• Journal of Korean Society of Rural Planning
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• v.22 no.4
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• pp.13-24
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• 2016

Tourism is often considered as one of the main industries to promote development and modernization in small South Pacific islands countries. In Fiji, this was recognized in the 1960s, and resulted in large-scale resort based tourism development in coastal areas. While tourism has obvious advantages to the economy, a lot of problems such as exclusive foreign control of the main hotels and resorts, considerable overseas leakage of earnings, the limited participation by indigenous resource owners, and localized environmental damages to reefs and mangroves are emerging. For sustainable tourism development, it is needed to set growth objectives and targets for tourism in terms of benefits to Fiji, and to concentrate support on 'Rural Tourism' such as community-based tourism that have lower leakage and put more into local economies. Through case study in this paper, to develop rural tourism at the local level, several recommendations are as follows: 1) to introduce various rural tourism programs such as experiencing Fiji's traditional culture, participating in activities, picking fruits and harvesting agro-products, 2) to enhance aggressive promotion and marketing strategies, 3) to build the capacity of local communities for improving the quality of tourism services, and 4) to provide the infrastructure for tourism business such as road accessing, water supply and disaster prevention.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.40 no.1
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• pp.31-38
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• 2007

This study investigated the fluid force acting on an artificial reef and the scour pattern at the bottom of the artificial reef in a steady-flow field using the finite difference method (Flow-3D). The structure was tetragonal in shape, like similar objects found in nature. The numerical analysis showed that the hydrodynamic characteristics and incipient scouring pattern matched natural phenomena. The velocity distribution around the tetragon was symmetric and wake occurred inside the tetragon and behind the bottom of the tetragon. The length of the recirculation flow behind the tetragon for each velocity was about 4-5 cm and the magnitude of the recirculation flow inside the tetragon generally increased with the Reynolds' number, although it decreased slightly for Reynolds' numbers from 11,000 to 12,000. In addition, the total fluid force acting on the tetragon increased with the inflow velocity, although the increment was smaller when the velocity exceed 18 cm/sec. The incipient pattern for the scouring of sediment matched the natural phenomenon.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.41 no.3
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• pp.221-227
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• 2008

The black rockfish (Sebastes schlegeli) is an important commercial species in Korean fisheries. We used acoustic telemetry using coded ultrasonic transmitters to track the home ranges and homing routes of the black rockfish that inhabit in the Tongyeong marine ranching area. Twenty-four fish were released at five points. The distance from the capture point (C1) to the released point was 0 (R7), 0.2 (R1), 0.9 (R2), 1.3 (R3) and 1.9 (R4) km. Two of the three fish released at R1 (0.2 km) returned home in under 48hrs. Another was found 0.8km from C1. Two of the five fish released at R2 returned home, but it took over 250 days. None of the ten fish released at R3 and R4 returned home. Three of the ten fish moved 1.1-2.6 km from C1 and were found near a cage or a natural reef. Six fish were released at R7. The younger the fish, the wider was its movement range around the artificial reefs. Fish over 3 years old were likely to move less far.

• Fisheries and Aquatic Sciences
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• v.3 no.1
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• pp.1-7
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• 2000

Different substrata fixed as the roof (for shadow) on artificial iron reef had been developed as a tool for valuable fishery resources. The experiment was set up on a sandy bottom substratum at 8m depth in Muronohana, Ikata, Japan. Within one month of placement of the plates, diatoms dominated the experimental plates with a coverage of $100\%$ approximately. Enteromorpha intestinalis and Colpomenia sinuosa dominated within three months after the placement. E. intestinalis coverage on substrata was estimated $7\%$ on the plate shaped iron bar, $12-14\%$ on concrete plates, $18\%$ on the plate fixed pebble, $61\%$ on the plate to accumulated wood, and 80-100% on the steel materials plate. Whereas after four months of placement, C. sinuosa coverage on plates became $1-36\%$ on different plates, and $100\%$ on the plate to accumulated wood. The differences in E. intestinalis and C. sinuosa colonization on the different substrata were probably due to variations in their surface roughness influencing the settlement of zoospores, and thus gametophyte. development. After five months of placement, the above two species slowly disappeared.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2011.06a
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• pp.192-192
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• 2011

For the safety of vessels sailing Marine Transport Facility announces sea route, reefs or shallow water. Photovoltaic, independent power system, installation in the general Marine Transport Facilities to be used in the marine lantern. Due to install of communications, controls, power consumption inceases. And the weather of cloudy day or rainy, generation of electricity is decrease. Recently, power system of marine facility using a hybrid generation system, photovoltaic generation system and wave power generation system. But increase of adhered shellfish inside the water column, is the cause of the reduction of efficiency. So study was conducted to Single channel AFS(Anti-Fouling system). In this paper we offer the Multi channel AFS for Marine Transport Facility and have simulated. Improve the accuracy of the research, we using the result of anode, in the experiment were actually in the buoy, is based on simulation. The experimental results is shown every anode's, in the Marine Transport Facility, ionization was conducted identically.

• Journal of Ocean Engineering and Technology
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• v.34 no.2
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• pp.66-76
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• 2020

A light buoy is equipped with lighting functions and navigation signs. Its shape and colors indicate the route to vessels sailing nearby in the daytime, with its lights providing this information at night. It also plays a role in notifying the presence of obstacles such as reefs and shallows. When a light buoy operates in the ocean, the visibility and angle of light from the lantern installed on the buoy changes, which may cause them to function improperly. Therefore, it is necessary for the buoy to have stable and minimal motions under given environmental conditions, mainly waves. In this study, motion analyses for a newly developed lightweight light-buoy in waves were performed to predict the motion performance and determine the effect of the developed appendages for improving the motion performance. First, free decay tests, including benchmark cases, were performed using computational fluid dynamics (CFD) to estimate the viscous damping coefficients, which could not be obtained using potential-based simulations. A comparison was made of the results from potential-based simulations with and without considering viscous damping coefficients, which were estimated using CFD. It was confirmed that the pitch and heave motions of the buoy became smaller when the developed appendages were adopted.

• Ocean and Polar Research
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• v.31 no.4
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• pp.305-318
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• 2009

A marine ranching project in Tongyoung was established in 1998, lasting 9 years to 2006. Project activities included the deployment of artificial reefs, the release of young fishes like jacopever and rockfish, and input/output control for specific marine ranching areas in Tongyoung. This report focuses on the economic feasibility of the project in hindsight. Analysis concentrates on three aspects; (a) direct economic benefits, such as increasing effects of fisheries income and savings in harvesting costs, (b) indirect benefits, including increasing effects of recreational fishing and saving R&D costs, and (c) costs, including releasing and purchasing costs of artificial reef and juvenile fish, R&D costs, maintenance costs and harvesting costs. Results show that NPV=4.7 billion won, IRR=8.55% and B/C ratio=1.286 under Scenario 1, which considers the saving effects of R&D costs, and NPV=0.9 billion won, IRR=6.03% and B/C ratio=1.11 under Scenario 2, which does not consider the saving effects of R&D costs, based on 5.5% of the social rate of discount. According to sensitivity analysis, the economic feasibility is very sensitive to the recapture rate.

• Journal of Advanced Marine Engineering and Technology
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• v.31 no.8
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• pp.1005-1012
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• 2007

This study describes the optimum structure and deployment of an abalone reef for marine ranching creation in Jeonnam archipelago of Korea. The structure of an abalone reef was analyzed based upon the functions of both feeding and shelter. Deployments of abalone reefs were considered based upon the stability against waves in water depth shallower than 5 m. Also, the calculation of their stabilities was made to only rocks of abalone modules, and exposure coefficient of rocks used was 1.0 and 0.5. The results show that rocks of both 0.2 and 0.5 ton are unstable under the condition that exposure coefficient is 1.0 at a depth of 5 m, but that they are stable under the condition that exposure coefficient is 0.5. It means that, if the structures(e.g. breakwater blocks) for dissipating the energy of waves and currents are provided, small rocks of 0.2 ton can be used as an abalone reef.

• Journal of Korean Society for Geospatial Information Science
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• v.11 no.3 s.26
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• pp.41-46
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• 2003

Marine geographical names refer to the names for the geographical forms in nature such as oceans, straits, bays, inlets, and channels as well as the various undersea form including reefs and trenches. Marine geographical forms, lying under the sea, are different from those in land and are related directly and indirectly to the safe navigation of ships, that is, property and life of human beings. Marine geographical names have not been correctly named and used so far as in the case of using the name 'Sea of Japan' instead of 'East Sea' Marine geographical names have been created arbitrarily from various sources including researchers, institutes, and academic societies, which leads to confusion and makes it difficult for those to be acknowledged internationally. This paper examines the uniqueness and technicality of marine geographical names and analyzes the efforts and status for the standardization processes in Korea.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.50 no.2
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• pp.124-130
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• 2014

We aimed to assess the behavior characteristics of fish on an artificial reef using hydroacoustic techniques. The acoustical survey was conducted with a 200 kHz dual beam transducer while fishing on the stone combination reef of Uljin. A school of fish were detected on the artificial reef before sunset and floated on the artificial reef at 30 minutes after sunset. The density (Nautical Area Scattering Coefficient, NASC) of fish that floated on the artificial reef after sunset was about $600m^2/nmi^2$; similar observations (about $50m^2/nmi^2$ or less) were noted after 19:00 hours. Fish caught by fishing on the artificial reef were Sebastes schlegeli, Hexagrammos otakii, Sebastes thompsoni, and Conger myriaster. Resultantly, we demonstrated that hydroacoustic techniques are useful for detecting behavior characteristics of fish in the artificial reef. Such results can be used for basic data to estimate the install effect of the artificial reefs.