• The Journal of the Korea Contents Association
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• v.18 no.8
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• pp.469-482
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• 2018

This research has developed the criteria and index for systematically and objectively assessing the quality of river water by fixing the various factors that affect Gyeongin ARA waterway's water quality through analysis with the Delphi Technique and analytic hierarchy program (AHP) Method. Based on the results, the highest criteria are, in order of importance, physical and environmental factors 28%, administrative factors 26%, natural fixed factors 26% and finally, cultural and social factors 20%. The three dimensions of the criteria show that for the internal physical and environmental factors, the most important are the loss of self-purification capacity, and the external factors are Gulpocheon and the sludge deposit due to Gyulhweon-weir the bridge. The facility factor in management was affected by the coagulation and waste water disposal facilities. The problem for the policy and institutional factors was seen in the regulatory area. The aquatic ecology/ point pollution source for the natural fixed factors show that it is due to the polluted water of Gulpo-cheon and the living environment/ non-point pollution source is shown through the inflow water from other rivers. Cultural and social factors show that the economical causes were due to the cargo and passenger flight operations and the external factors of having a lack of sewage treatment equipment have an importance effect. In order to estimate the order of priority through logical evidence and objectivity, future research must be continued on the evaluation indexes to measure the specific methodology and technique needed to improve the Gyeongin ARA Waterway.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.9
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• pp.5826-5834
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• 2014

This paper examined the changes in flow patterns due to a blockage of tidal currents in the sea areas between Incheon North Port and Yeomha Channel when it would be influenced by the construction of the Incheon North Port Yeongjongdo dredged soil dumping ground and Incheon Bay tidal power plant. The numerical simulation was performed for three cases: before and after constructing the Incheon North Port Yeongjongdo dredged soil dumping ground and after the construction of the sea-dyke on the east side of the Incheon Bay tidal power plant. The simulation results showed that the tidal directions and currents velocity were similar before and after the construction of the Yeongjongdo dredged soil dumping ground. After the construction of the East Sea-dyke of Incheon tide power plant, however, the tidal currents patterns changed significantly due to flow blockage toward Gyeonggi Bay. The main flow was formed in the north-south direction, and the tidal currents velocity increased slightly on the downstream areas (A,B,C) of Hodo, which is the entrance of the Ara Waterway. The tidal currents at the mouth(D) of Yeomha Channel decreased significantly. The tidal currents of the west side of Se-eodo and the east side of the sea-dyke were rotary currents. The results of this study will provide basic data for the environmental impact assessment and the operation of the Gyeongin Ara Waterway.

• Journal of Korea Port Economic Association
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• v.33 no.3
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• pp.139-154
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• 2017

As competition in domestic and overseas ports intensify, new and small domestic ports are realizing certain limitations to independently secure competitiveness. This study collected data over 60 months with five modifications for container and general cargo volume around Gyeongin Port. Short-period (12 months) cargo volume was forecasted, which revealed the need for a middle-to-long-term development plan. First, the hinterland logistics complex of Gyeongin Port is expected to contribute to the coastal maritime facility through the quasi-public system for fishery product transportation and passenger services. It proposes to achieve this by opening channels to and from China for precision machinery, home network systems, LEDs, and machine industry items. second, specializing the ultra-light cargo transport route, and connecting the coastal island areas of the 5 West Sea Islands to Ara Waterway (Integrated Fishery Product Center of the 5 West Sea Islands). Third, on the basis of organic cooperation of government? local government ? port, the incentive and pre-circular support system would be required, and lastly, it shall carry out the adjustment of functions in nearby ports and specialization strategy simultaneously through the integrated operation of the ports in the capital areas.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.409-413
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• 2012

아라뱃길은 다양한 수리구조물의 조작을 통하여 선박운항 및 홍수처리가 이루어지며 유입홍수량, 한강수위, 그리고 서해조위 변동과 연계하여 귤현보, 서해배수문, 체절수문, 그리고 배수펌프장 등의 대표적인 구조물 운영을 지원할 수 있는 홍수위 계산모형이 필요하다. HEC-RAS모형은 이러한 수리구조물 운영을 효과적으로 경계조건으로 반영할 수 있는 장점이 있다. 특히 서해배수문의 경우 조위변동과 내수위를 동시에 고려한 수문운영이 필요하여 Rule-script기능을 적용하여 이러한 특성을 반영하였다. 모형의 검보정을 위하여 2010년 9월 홍수사상을 적용하였으며 모형으로부터 계산된 수위값과 관측된 수위값이 서로 잘 일치함을 확인하였다.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.26 no.5
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• pp.327-334
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• 2014

This study aims to estimate settling velocity ($W_s$) for cohesive sediments from water bodies (Incheon Coast, Kulpo Stream and Han River) mainly connected to the Kyeongin Ara-waterway through the laboratory settling experiments. Results of settling tests for these sediments show that $W_s$ values for sediments are quite different each other: $W_s$ values of Kulpo Stream sediments (0.01 < $W_s$ < 3.07 mm/s) are quite similar with those of Han River sediments (0.01 < $W_s$ < 2.97 mm/s) over the whole range of suspension concentration C (0.1 < C < 90 g/ L), while they are quite different with those for Incheon Coast sediments (0.01 < $W_s$ <0.92 mm/s). Qualitative analyses on test results for physico- chemical properties of sediments and waters with respect to settling velocities show that these differences in settling velocities are mainly due to the salinity difference in the water.

• Journal of Navigation and Port Research
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• v.37 no.1
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• pp.71-77
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• 2013

Most of the maritime accidents are the crash that occurred by complex coastal terrain, increased maritime traffic and frequent weather changes. Therefore, transportation safety is exactly determined using accurate environmental informations, but if informations are inaccurate or insufficient, accident risk can be increased. Therefore, ship need the system that can accurately generate transportation safety information. This paper proposes the transportation safety system and performance evaluation in the real environment. The proposed system includes database of environment informations and navigation algorithm using PPP method to estimate the accurate ship position. Therefore, this system can accurately calculate distance or freeboard between ship with other factors. Futhermore, when weather is deteriorated, crew can sail with database based 3-D monitoring module in the transportation safety system. To verify the function and performance, data of Kyungin ARA waterway and ferry is used to evaluation.

• Journal of Korea Water Resources Association
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• v.45 no.9
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• pp.943-957
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• 2012

In this study, a technique based on Fractal Theory with Erosion Model was developed to interpolate the river morphology data at the border area between river bed and river side where both surface and under water surveyings can not be committed easily. Three dimensional river morphology data along the Ara River was generated by the developed technique. The Ara River is an artificially constructed waterway for vessels between the Han River and West Sea of Korea. The result was compared with the survey data by RMSE of 0.384, while the IDW interpolation result has RMSE of 0.802. Consequently, the developed river morphology data interpolation technique using Erosion Model based Fractal Theory is conceived to be superior to the IDW which has been generally used in generating the river morphology data.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.387-391
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• 2012

경인아라뱃길은 인천 서구 오류동과 서울 강서구 개화동을 연결하는 뱃길로 선박의 항해를 위한 주운수로와 두 개의 갑문으로 이루어져 있다. 홍수시 굴포천 상류유역의 홍수량이 열결 수로를 통하여 서해로 배제되며, 굴포천 하류유역의 경우 연결 암거를 통해 홍수량 일부를 서해로 방류한다. 본 연구에서는 2011년 발생한 7월 호우사상에 대하여 경인아라뱃길 유역의 홍수량 및 홍수위의 변화를 검토하였다. 강우-유출 모의는 Clark 유역추적법을 적용하여 14개의 소유역별 홍수량을 산정하였으며, Muskingum-Cunge 방법을 적용하여 하도추적을 수행하였다. 소유역에 대한 홍수 도달시간과 저류상수는 각각 Kirpich 방법과 Russel 공식을 이용하였고, 유출곡선지수값은 AMC-III를 적용하였다. 강우자료는 서울기상청과 인천기상대의 2011년 7월 호우사상을 사용하였으며, 하도의 홍수위 분석은 부정류 해석방법을 이용하였다. 분석 결과, 경인아라뱃길의 각 지점 홍수위는 제방고보다 전체적으로 낮았다. 100년 빈도 홍수량에 대해서 홍수방어가 가능한 경인아라뱃길은 2011년 7월말 호우사상에 대하여 안전한 것으로 판단된다.

• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.84-88
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• 2015

경인 아라뱃길은 국내에서 운영된 사례가 없는 기수역 운하로서 유량 및 수환경 관리 등을 포함한 수질관리 상황을 종합적으로 평가하기 위한 대책이 필요하다. 또한 경인 아라뱃길로 유입되는 오염원에 대한 현황 및 현장조사를 실시하고, 유입 오염원인을 정확히 파악하는 것이 중요하다. 따라서 경인 아라뱃길 유역의 수질조사 및 분석, 수질예측을 통해 수질관리 방안을 제시하였다. 분석결과, 홍수시 경인 아라뱃길로 유입되는 굴포천의 DO, BOD, SS는 삼정천의 영향으로 상승하였다. 삼정천은 굴포천 상류에서 부천시와 인천시의 관할 행정구역 면적에 비해 인구밀도가 높고 축산 농가 및 산업계로 인한 미처리 유출수에 의해 굴포천에 직 간접적인 영향을 미치고 있는 것으로 판단된다. 또한 굴포천 하수처리장 방류 이후 BOD, T-N, T-P의 경우 급상승하였다. 따라서 굴포천 중류의 부천시 삼정동과 인천시 계양구 내 하수 및 폐수를 하수처리장을 통해 배출할 수 있는 공동처리장 운영 등의 처리 방안이 필요하다. 또한 EFDC 모형을 이용한 해수와 담수의 성분비 변화에 대한 경인 아라뱃길의 수질을 예측한 결과, 해수가 많을수록 수질이 BOD, COD 등이 양호 한 것으로 나타났다. 그러나, 염분에 의한 지하수 및 주변환경 변화에 대한 영향을 고려하였을 때, 해수와 담수비를 조절하는 것보다 성분비를 유지하고 유입되는 양을 확대한다면, 경인 아라뱃길의 수질관리는 효과적일 것으로 판단한다.

• Tunnel and Underground Space
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• v.34 no.3
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• pp.185-195
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• 2024

The Incheon Metro Line 1 Geomdan Extension Phase 1 is the first project in South Korea where both a roadheader and TBM (Tunnel Boring Machine) are being used together. The shield TBM tunnel section is 1,057 m long, and is mostly composed of rock, including the section beneath the Airport Railroad and the Gyeongin Ara Waterway. A 7.8 m earth pressure balance shield TBM was used for tunnel excavation. The average monthly advance rate for both the North and South tracks is 239.1 m, with a maximum monthly advance rate of 334.5 m. This technical article comprehensively evaluates the productivity of the shield TBM, focusing on the TBM excavation performance. Above all, it aims to provide useful reference material for the successful execution of shield TBM tunnel construction.