• Title/Summary/Keyword: Harbour

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A Study on Improvement of Cathodic Protection Design of Harbour Marine Steel Structure (항만 강관 구조물의 음극방식설계 개선방안에 관한 연구)

  • 김성종
    • Journal of Advanced Marine Engineering and Technology
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    • v.21 no.5
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    • pp.584-590
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    • 1997
  • Harbour marine steel structures, which are served in severe marine environment, should be protected in appropriate method to reduce corrosion problems. Cathodic protection, one of the protection methods in terms of practical and economical point of view is being widely used to marine steel structures mentioned above. Recently it has been reported that the life of Al alloy anode with sacrificial anode for protection of harbour marine steel structures was shortened significantly than the original design life. In this study, the optimum cathodic protection design of harbour marine steel structures was investigated with parameter of sea water pollution degree.

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A Study on the Sector Division for Effective Vessel Traffic Service : Focused on Daesan, Pyeongtaek and Inchon Harbour

  • Yang, Hyoung-Seon
    • Journal of Navigation and Port Research
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    • v.34 no.4
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    • pp.265-270
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    • 2010
  • The national VTS was launched in 1993, and has adopted a harbour-oriented control method which is unable to consider enough characteristics of its work. However, for the past 17 years, the characteristics has changed due to increased amount of vessels. Up to now the domestic Vessel Traffic Service has adopted harbour-oriented control method which is unable to consider enough characteristics of its work. However, developed countries have carried out waters-oriented control method, according to the using areas of ships, to be well considered the characteristics of control for increasing efficiency of it. Especially, VTS of Daesan, Pyeongtaek and Inchon harbour can have confusions of control because of overlapped service areas of it. Therefore, in this paper suggested a new Sector Division that the relevants waters is divided into 3 operational Regions and these are divided into nine sectors again, for the purpose of improving the efficiency and the concentration of VTS.

The Characteristics of Water Quality in Mokpo Harbour(II) - Centering on eutrophication summer - (목포항의 수질특성 - 하계의 부영양화를 중심으로 -)

  • 김광수
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.3 no.S1
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    • pp.77-90
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    • 1997
  • the observations in situ and the seawater analyses were conducted in July and August, 1996 for the purpose of evaluating the characteristics of seawater quality centered on eutrophication in Mokpo harbour. By applying the OECD standards of trophic classification to the parameters such as secchi depth, total inorganic nitrogen, phosphate phosphorus and chlorophyll-a, the trophic level of seawater in Mokpo harbour was evaluated to be in eutrophic state in summer. By the estimation of pollution index with relation to eutrophication, the seawater quality of Mokpo harbour was evaluated to be under the regular grades and this evaluation was found to be different from the results of evaluation obtained by the environmental index of single parameter, chemical oxygen demand. By the estimation of eutrophication index, the seawaters of Mokpo harbour were shown to have the high potentiality of red tide occurrence.

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A Study on Real Time Simulation of Harbour Manoeuvre and Its Application to Pusan Harbour (출입항 조종의 실시간 시뮬레이션 기법 및 부산항에의 적용에 관한 연구)

  • 손경호;이성욱;배정철
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.3 no.2
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    • pp.33-49
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    • 1997
  • This paper deals with desktop simulator which can be utilized for total assessment of safety in harbour manoeuvre on a personal computer. Current, wind and tug forces are treated as well as precise mathematical model of a ship for low advance speed including stopping behaviour with effect of water depth. By using the desktop simulator, the real time simulation of berthing and unberthing manoeuvres was applied to Pusan harbour as an example. It is concluded that the above simulation technique will be beneficial to assessment of ship's safety under the environmental conditions is harbour area.

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The Characteristics of Water Quality in Mokpo Harbour(II) -Centering on eutrophication in summer- (목포항의 수질특성(II) - 하계의 부영양화를 중심으로 -)

  • 김광수
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.3 no.2
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    • pp.51-61
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    • 1997
  • The in situ observations and the seawater analyses were conducted in July and Auguse, 1996 for the purpose of evaluating the characteristics of seawater quality centered about eutrophication in Mokpo harbour. By applying the OECD standards of trophic classification to the parameters such as secchi depth, total inorganic nitrogen, phosphate phosphorus and chlorophyll-a, the trophic level of seawater in Mokpo harbour was evaluated to be in eutrophic state in summer. The estimation of pollution index by eutrophication showed the seawater quality of Mokpo harbour to deteriorate and fall under the regular grades. The results of eutrophic index estimation showed the high otentiality of red tide occurrence in Mokpo harbour.

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Enlargement of Harbour limit for expanding Anchorages in Ulsan Port (울산항 정박지 확충을 위한 항계 확장에 관한 연구)

  • Yun, Gwi-Ho;Kim, Bu-Young;Lee, Yun-Sok
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2010.04a
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    • pp.169-170
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    • 2010
  • Ulsan Port is in the situation which the harbour limit and anchorages are less narrow than other trading ports and the occurrence probability of marine accidents is high due to heavy marine traffic Especially, the shortage of anchorages will become worse in case that the number of inbound and outbound vessels increases according to the development of Ulsan New Port. We will find and suggest the plan to enlarge the harbour limit essentially needed to expand anchorages in this research The reasonable type of harbour limit which is based on the survey by a group of experts, was determined after the decision of the range of harbour limit to accommodate the relevant anchorages.

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Evaluation of the Traffic Congestion in the Passage I of Pusan Harbour due to the Operning of the Extended Terminal adjacent to the Gamman Terminal and Other Port Developments (감만부두 확장구역 개장과 기타 항만개발이 장래 부산 북항에 미치는 해상교통 혼잡도 평가에 관하여+)

  • 구자윤;여기태
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 1999.10a
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    • pp.91-99
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    • 1999
  • In Pusan Harbour, new port development projects are implemented such as the Extended Terminal adjacent to the Gamman Terminal, Pusan New Port, the Nary $\infty$ piers, etc. which will require new marine traffic environments in the Passage I of Pusan Harbour Specially, the turning basin of the Extended Terminal adjacent to the Gamman Terminal gas been designed to overlay the Passage I of Pusan Harbour, Which will interrupt the inbound traffic flow and the results will be worried to decrease the efficiency of port operation. Therefore, this paper will be aimed to evaluate the traffic congestion in the Pusan Passage I due to the opening of new ports within Pusan Harbour in 2006 and 2011 by using computer simulation based the queueing theory.

A Study on the Estimation of Service Level for National Fishing Harbour Breakwater Lighthouse Based on the Traffic Volume (통항량 기반의 국가어항 방파제등대 서비스수준 추정 연구)

  • Moon, Beom-Sik;Song, Chae-uk;Kang, Jeong-Gu;Kim, Tae-Goun
    • Journal of Navigation and Port Research
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    • v.45 no.6
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    • pp.306-313
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    • 2021
  • National fishing harbour is as a refuge for fishing boats and a breakwater lighthouse is installed as a functional facility in consideration of harbour identification and the safety of passing vessels. In this study, the service level of breakwater lighthouse (234 units) was estimated based on the traffic volume of 105 national fishing harbour. For this purpose, the evaluation items were determined, the fishing harbour standard index was calculated (Fs=1), the proximity of fishing harbour was identified and the function (service level) of the breakwater lighthouse was estimated in the following order. However, national fishing harbour differed in size, traffic volume and fishing vessel capacity. Therefore, 105 national fishing harbour were divided into three groups through cluster analysis. The cluster analysis was based on the service level factors of the breakwater lighthouse, such as the number of weeding fishing vessels, tonnage of fishing vessels, the number of incoming and outgoing vessels per year, and fishing vessel capacity. As a result of the estimation, the service level of the breakwater lighthouse (light tower height, visual height, visual range, interval) was 10.50m, 16.50m, 7.00mile, 5.5sec for group 1, and 10.67m, 16.16m, 8.33mile, and 6.0sec for group 2, The three groups are 11.53m, 16.75m, 6.75mile and 5.0sec. The results of this study can be used as useful basic data for improving the service level of traffic vessels when a breakwater lighthouse is built in a fishing harbour in the future.

Development of the Speed Limit Model for Harbour and Waterway(II) - The Method of Speed Limit Decision and Application -

  • Kim, Deug-Bong;An, Kwang
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.21 no.3
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    • pp.274-282
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    • 2015
  • This research is the result on calculating the logical speed limit through certain process which some elements must be considered on selecting the speed limit of harbour and waterway. The suggested speed limit select model on this research is processed from 1~6 steps by forming a professional group of experts. Each step has its information which 1st step(water division), 2nd step(selecting the model vessel and vessel applied with speed limit.), 3rd step(selecting the maximum and minimum speed range on each section), 4th step(evaluation on the safeness of traffic), 5th step(suggesting the appropriate speed limit), 6th step(execution and evaluation.). The appropriate speed limit was decided on consideration of the safety of maritime traffic on the range of the maximum speed and the minimum speed. This model was used to derive the appropriate speed limit on the harbour water and Busan harbour entrance waterway. As the result, the harbour water was calculated to be 6.9 knots, the appropriate speed limit of Busan entrance harbour was 9.3 knots. The present calculation of the speed limit on the approaching channel area is 10 knots, inner harbour area is 7 knots, which are similar to the result of the speed limit. This research is the first research on selecting the speed limit model and has its limits on finding the perfect speed limit result. More detailed standards on the safeness of traffic evaluation must be found and additional study is necessary on discriminating consideration of the elements. This research has its value which it provides instances of aboard cases on guidelines of selecting the speed limit.

A Standardized BIM Framework for Supporting Life-cycle Business Process for Port & Harbour Facilities (항만시설의 생애주기 업무 지원을 위한 BIM 표준 프레임워크 구축)

  • Moon, Hyoun-Seok;Won, Ji-Sun;Shin, Jae-Young
    • Journal of KIBIM
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    • v.8 no.4
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    • pp.49-59
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    • 2018
  • Recently, the application of BIM for port & harbour facilities has been increasing, as it is widely applied to the infrastructure field both at domestic and abroad. However, the port and harbour projects still have very poor facilities information management system and the application level of BIM is very low compared to other facilities. Even if BIM is applied for those project, it is very difficult to determine in advance what information is needed without an accurate understanding of the business process. The purpose of this study is to develop a BIM framework for port & harbour facilities and to examine its applicability. To do this, we structured the classification of the port & harbour facilities and constructed object-based classification system based on ISO12006-3 standard. We also derived the BIM framework requirements from the viewpoint of process, standard, interface, and information, and confirmed the linkage of the BIM object classification system in the framework item. The applicability of the BIM framework for inspection process cases of port & harbour was examined. Accordingly, this study can solve requirement setting method, which is the non - procedural and non - systematic project information, in the BIM application process of the port & harbour project with the BIM framework. In addition, the framework is expected to be integrated into the system to play a key role in the selection of project objectives, and the ability to clearly identify the information requirements required by the BIM manager to perform the project.