• 한국해안·해양공학회논문집
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• 제21권5호
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• pp.380-390
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• 2009

본 연구는 우리나라 남동 해안에 위치한 매립지(안정국가산업단지, 명지주거단지 및 녹산국가산업단지)에서 해안빈지 면적 산출을 위하여 항공사진으로부터 매립이전의 해안선을 조사하는 연구의 일환으로 수행되었다. 매립 이전 해안선의 적합성을 평가하고자 해안선변화자료를 구축하였다. 2차적인 지상기준점으로 오래된 항공사진의 항공삼각측량을 수행하였다. 해안선은 약최고고조위(AHHWL)에 해당하는 해안선과 wet/dry 흔적에 의한 고조선(HWL)을 도화하였다. 인공적인 해안에서 두 종류의 해안선은 잘 일치하였다. 항공사진 축척, 품질, 지상기준점 선정, 해안선 인식 등 세부적인 차이로 인하여 해안선변화자료는 다양한 오차수준으로 구성되었다. 정성적인 해안선변화 추이를 살펴보는 수준에서 매립 이전 해안선의 적합성은 만족할 만하였다. 본 연구지역에서 매립 이전의 해안선 변화는 대부분이 연안개발로 발생하였다. 항공사진과 연계하여 해안선의 속성을 파악함으로써 해안선 변화에 대한 이해가 가능하였다.

• 해양환경안전학회지
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• 제16권4호
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• pp.321-337
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• 2010

1979년부터 2009년까지 31년 동안 목포연안 수질환경의 특성과 장기변동 경향을 조사하였다. 5개 정점에서 수층(표층과 저층)별 계절별로 년 4회 수온, 염분, 부유물질, 화학적산소요구량, 용존산소, 영양염류에 대해 조사한 결과, 표층수와 저층수 간에는 수소이온농도 및 인산인을 제외한 모든 조사항목에서 표 저층 간의 차이가 컸었다. 공간적 분포특성은 수온과 수소이온농도 및 용존산소는 표층과 저층 공히, 인산인과 질산질소는 저층에서 정점 간 차이가 없었으나, 그 외 조사항목에서는 정점 간 차이가 컸으며 주성분 분석결과 영산강 하구역인 정점 1과 중간인 정점 2~4 및 비교적 외해 측인 정점 5의 세 그룹으로 구분되었다. 계절별로는 질산질소를 제외한 전조사 항목에서 유의성이 입증되었고, 정점별로 차이가 있어 내측은 계절에 따른 변화가 큰 상태이었고 외해 측으로 갈수록 변화폭이 줄어드는 경향이었다. 30년 동안 수질의 장기 변동은 표층 네 그룹, 저층 두 그룹으로 구분되어 항목에 따라 부분적으로 차이가 있었으나 전반적으로 수온, 수소이온농도 및 화학적산소요구량은 점차 증가하는 경향이었고 용존산소는 불규칙한 변곡선 형태이며, 영양염류는 증가하는 경향으로 1990년 후반부터 그 폭이 커지는 경향으로 2009년에는 약간 안정화되는 특정을 보였으나, 경인연안, 아산연안, 천수만 및 군산연안과 마찬가지로 육수 유업의 원인에 기인한 것으로 사료된다.

• 한국해양공학회지
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• 제20권1호
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• pp.63-68
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• 2006

Recently, it has been widely recognized that coastal vegetations may have great value in supporting fisheries, protecting from wave attack, stabilizing the sea bed and maintaining good scenery. Hydrodynamic factors play a major role in the functions of water quality and ecosystems. However, the studies on physical and numerical process of wave propagation are few and far behind compared to those on the hydrodynamic roles of coastal vegetations. In general, Vegetation flourishing along the coastal areas attenuates the incident waves, through momentum exchange between stagnated water mass in the vegetated area and rapid mass in the un-vegetated area. This study develops a numerical model for describing the wave attenuation rate in the complex topography with the vegetation area. Based on the numerical results, the physical properties of the wave attenuation are examined under various wave, geometric and vegetation conditions. Through the comparisons of these results, the effects of the vegetation properties, wave properties and model parameters such ac the momentum exchange coefficient have been clarified.

• 환경영향평가
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• 제14권3호
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• pp.127-134
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• 2005

Recently, aquaculture farm sites have been increased with demand of the expensive fish species and sea food like as seaweed, laver and oyster. Therefore coastal water quality have been deteriorated by organic contamination from marine aquaculture farm sites. For protecting of coastal environment, we need to control the location of aquaculture sites. The purpose of this study is to detect the laver aquaculture sites using multispectral remotely sensed data with autodetection algorithm. In order to detect the aquaculture sites, density slice and contour and vegetation index methods were applied with SPOT and IKONOS data of Shinan area. The marine aquaculture farm sites were extracted by density slice and contour methods with one band digital number(DN) carrying 65% accuracy. However, vegetation index algorithm carried out 75% accuracy using near-infra red and red bands. Extraction of the laver aquaculture site using remotely sensed data will provide the efficient digital map for coastal water management strategies and red tide GIS management system.

• Ocean and Polar Research
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• 제33권1호
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• pp.85-97
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• 2011

The tidal flats of Korea today have reduced by 40% in size compared to 1964. To manage this important habitat properly, development of well-organized and nationwide-applicable grading systems is required. There have been several assessment systems proposed previously in Korea, but they are critically flawed in that selected biological indicators are not adequate and grading criteria are obscure and arbitrary. We reviewed the indicators used in these previous evaluation systems (e.g., diversity indices, quantity and quality of benthic macrofauna, halophytes, water birds, etc.) and subsequently proposed new indicators and an improved grading scheme. For the quantitative assessment of macrobenthic community, biomass reflecting production and ecosystem function is recommended over density, which is much less discriminatory among habitats. Of biodiversity indices used, within-, between-habitat and regional biodiversity indices that accurately reflect sampling efforts are suggested. In addition, we proposed to include species rarity, ecosystem engineers, and the ecological quality index ISEP (Inverse function of Shannon-Wiener Evenness Proportion). As for halophytes, their low spatial coverage on benthic habitat suggests that their presence can be used as an ecological indicator of benthic habitat, regardless of their protective status. We stress the need to introduce 1) quantile approach for quantitative indicators (e.g., diversity, biomass, etc.) in relation to grading, 2) presence-absence approach for spatial or aggregate indicators (e.g., boundaries of halophytes and feeding ground of water birds) and 3) benthic habitat mapping that combines all of these indicators.

• 수산해양기술연구
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• 제26권4호
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• pp.341-352
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• 1990

The purpose of this research is to develop the design/control method that can be used for the improvement of harbour tranquility and water quality of fishing ports. For this end, firstly, the hydraulic environmental characteristics of fishing ports in the coastal waters of the Korean Peninsula are analysed and discussed combined with disasters of facilities and vessels in the ports. Secondly the problems of water quality control is pointed out considered with the improvement measures of harbour tranquility such as the methods of lengthen of main breakwaters and construction of wave absorbing structures. Finally, the control characteristics of composite functions of water quality and tranquility of fishing port are discussed and the improved control method si proposed using the experimental results for the various measures. The proposed measure is proved to be a applicable method to improve these two main functions on the design of fishing port.

• 해양환경안전학회지
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• 제7권2호
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• pp.67-87
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• 2001

ICZM(integrated coastal zone management) is recognized globally as an optimal solution on coastal issues and problems because it aims integration of all the different programs and stakeholders on coastal interests. Evaluation of ICZM program is also recognized globally for the success of ICZM because we can get many useful experiences and learning through evaluation. There are many issues and problems in coastal zone in Korea such as coastal development, wetland loss, deterioration of water quality, decreasing of fisheries stocks, limit of public access, etc. Recently highly centralized ICfM has been introduced in Korea but there are so high barrier between ICZM program and other relevant sectors. This paper tries to fond factors to evaluate and further evolution of ICZM in Korea which is very centralized system.

• 한국환경과학회지
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• 제11권7호
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• pp.721-727
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• 2002

The characteristics of drinking groundwater quality at Chung Cheong Nam Do was analyzed by investigating the 3,086 groundwater data which were carried out the water quality inspection from Jan. 1998 to Dec. 1998. It was found that all the mean concentration of items was not over the drinking water quality standard except Zn at Yeongee area. The highest mean concentration of nitrate was $8.2 mg/{\ell}$ at Hongsung area. And the mean concentrations of nitrate and ammonium at Sucheon, Yesan, Yeongee were relatively higher. It was considered that the groundwater of that area was contaminated by breeding livestock as farm pollutants. The mean concentrations of chloride, hardness and evaporation residual at coastal regions were higher than inland regions. Especially the mean concentration of chloride was 2.5 times higher. It was considered that the groundwater at coastal regions was affected by seawater. It was found that the correlation between Fe and Mn was relatively high(r=0.776) and the correlation between hardness and evaporation residual was very high(r=0.983). The rainfall series and detection rate of E-coli had the hydrologic persistence. The correlation between the detection rate and rainfall series over 150 mm was very high (r=0.9146). Therefore it is surely required to control the groundwater sanitation in the rainy season.

• 한국해안해양공학회지
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• 제19권2호
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• pp.128-135
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• 2007

해양수산부에서 연안에 설치한 기상 관측 장비로 측정된 우리나라 세 지역(낙동강 하구, 시화호, 마산만)의 기온과 수온 자료를 바탕으로 기온-수온의 비선형 상관관계를 분석하였다. 기온-수온 대표관계인 비선형 S-모형의 관계식에 포함된 4개의 매개변수를 결정하기 위해서 SCE 최적화 기법을 이용하였으며, 마산만 지역에서는 계절적 이력현상을 고려하여 서로 다른 관계식을 적용하였다. 기온-수온 상관 관계는 시간규모에 따른 최대 온도값과 최소 온도값에 차이가 있으나 수질 또는 생태 반응의 적당한 시간규모에 해당하는 주 평균 온도값을 이용하여 분석하였다. 전반적으로 연구지역인 하천과 해안이 접하는 우리나라 해안 및 하구 지역에서는 S-모형의 관계식이 선형 관계식보다 적합한 것으로 파악되었다. 이 연구는 기후변화 가설에 따른 미래의 수온변화에 반응하는 수질, 수문, 및 생태반응을 모의하여 공학기술자 또는 정책입안자에게 적절한 기후변화 대책 방향을 설정하는데 기여할 것으로 사료된다.

• Ocean and Polar Research
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• 제29권4호
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• pp.319-326
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• 2007

Coastal marine ecosystems continue to suffer unrelenting pressures from human population growth, increased development, and climate change. Moreover, these systems' capacity for self-repair is declining with such increases in anthropogenic production of various pollutants. What is the present health status or condition of the coastal ecosystem? If our coastal areas are unhealthy, which conditions are considered serious? To answer such questions, the United States, Canada, and Australia are currently assessing coastal ecosystem health using systematic monitoring programs as well as identifying and implementing management plans to improve the health of degraded coastal ecosystems. To evaluate marine environments, Korea is currently using a limited number of factors to estimate water quality. In fact, we are ill-prepared for assessing coastal ecosystem health because no biologically specific criteria are in place to measure the responses to various pollutants. We should select ecosystem-specific indicators from physicochemical stressors and evaluate the subsequent biological responses within each ecosystem. Furthermore, a set of practical indicators should be generated by considering the characteristics and uses of a local coastal area and the key issues at hand. The values of indicators should be presented as indices that allow understanding by the general public as well as by practitioners, policy makers, environmental managers and other stakeholders.