해수 담수화에 있어 RO막오염을 방지하기 위한 전처리로 MF 및 UF에 대하여 연구되어 왔으며, MF/UF의 전처리로 오토스트레이너를 사용하여 100μm 이상의 입자를 제거하는 것이 일반적이다. 그러나, 서해안의 경우 남해보다 높은 고탁도 물질이 다량으로 함유되어 있어 정확한 해수 특성분석에 따른 전처리 공정이 선정되어야 할 것으로 판단된다. 따라서 본 연구에서는 서해안 지역의 해수 특성에 대하여 분석하여 적합한 전처리를 선정하기 위한 조건을 도출하고자 하였다. 서해안 지역의 15지점 해수에 대하여 탁도, SS, SiO2, TOC, UV254, 보론, TEP 등 20여개 항목에 대하여 분석하였다. 해수의 탁도는 평균 6.5∼ 11NTU를 나타내었으며 입도분석결과 2∼20μm 입자가 97% 이상 존재하였다.

본 연구는 서해안에서 상선의 어구 손괴로 인한 추진기 장애를 예방하기 위해 연안자망어선의 월별분포를 제시하였다. 분석 방법은 2014년 1년간의 어선위치발신장치 데이터를 이용하였다. 조업 해구도를 기준으로 경·위도 30′× 30′크기의 해구별 간격으로 격자를 설정하였다. 총 56개 해구를 대상으로 격자를 구성하였다. 연구 결과 밀도지수가 가장 높았던 194해구는 어구 손괴가 없었다. 반면, 밀도지수가 상대적으로 작은 193해구는 상선의 주 통항경로에 어구가 설치되기 때문에 손괴가 발생했다. 이 분석을 바탕으로 어구 손괴는 밀도지수에 비례하지 않고 상선의 주 통항경로에 따라 손괴위험이 존재하는 것으로 나타났다. 따라서 상선의 안전항해를 위해 5월부터 9월까지 위도 34.5° ~ 35.5°, 경도 125.67° ~ 126°를 항행경보구역으로 통보하면 추진기 장애와 어구손괴와 같은 해양사고를 예방할 것이다. 따라서 상선이 193해구와 203해구를 항해할 때는 안전한 항해를 위해 위도 34.5° ~ 35.5°, 경도 125.5° ~ 125.67°을 추천한다.

The Fishing gear loss has been repeated every year in the West Sea; however, there has been no solution. So fisher men have undergone economic loss every year. Thus it is required to reduce the loss of fishing gear. In this study to find out the reason that the fishing gear is lost in the Sea, 10 years data of wave and current for 6 locations in the West Sea were investigated and a numerical modelling were conducted into the behaviour of a gillnet in wave and current. The fishing gear was modelled with the mass spring model. As a result, it came out into the open that the location where fishing gear loss occurred most frequently was Choongnam province. The height of the maximum significant wave in this province was 6.7 m and the period of that was 4.4 second. The maximum current speed was 0.7 m/s. As a result of simulation with these data, it was revealed that the buoy is one of the reasons to decrease the holding power of the gillnet. For example, the tension of anchor rope was decreased to 50% while the drag coefficient or volume of buoy was decreased to 25%. So it is predicted that an improvement of the buoy contributes to the reduction of the gillnet loss.

This study was carried out to investigate insect community structure from different habitats. We performed day and night collection at three different habitats (mountain, coast and rural area) of island Deokjeok, island Soya and island Mungap from May to September in 2014. A total of 3,482 individuals of 725 species, 119 families belonging to 10 orders were collected and identified. A dominant species was Corymbia rubra (Cerambycidae) despite a very low percentage of the species among the catches. Results of ANOVA test showed a significant effect of habitats typeon species diversity. Also, combination of seasons and habitats types were significantly influential with species abundance and species diversity. Indicator species analysis (ISA) result identified 121 significant (p < 0.05) indicator species; one species for the habitats cluster, 93 species for the season cluster and 27species for combination of habitats with seasons.

Surveillance for subtropical moths through the inanimate pathway in the Korean Peninsula was investigated during the past seven years using the light trap in Baengnyeong and Daecheong islands, located near the Northern Limit Line (NLL) in the West Sea. Each record typically includes the taxonomic identify, its country of origin, and information related to inanimate pathway. A total of 2,201 individuals were detected, comprising 25 families, 441 species of Lepidoptera. The most dominant species was Chionarctia nivea (Noctuidae) with 44 individuals, followed by a crambid moth, Ostrinia furnacalis with 37 individuals. Among them, two species of subtropical moths, including Ischyja manlia Cramer and Spirama sp. belonging to the family Noctuidae, and they are mostly distributed in the subtropical area from the southern part of China to Borneo or Java. Interestingly, the other three species, Acronicta pruinosa (Guenée), Marumba spectabilis (Butler), and Spodoptera pecten Guenée were distributed in the southern regions, however, due to the effects of global warming, biotic province is now considered that may be certified moving northwards. Thus, it is very important to our weather conditions and further study on the surveillance of subtropical or/and southern species is needed, considering its possible status as a pest insect.

In a faunistic survey for the family Coleophoridae (Lepidoptera: Gelechioidea) on Is. Yeonpyeong and Is. Baengnyeong in 2010 and 2006, respectively, eleven species of Coleophora were recognized. Among them, three species; Coleophora adjunctella Hodgkinson, C. chenopodii Oku, and C. kurokoi Oku are reported for the first time from Korea. For the newly recorded species, taxonomical remarks and illustration of adults and genitalia are given.

Experimental fishing was carried out to compare the catches of main species and bycatch according to the codend mesh size (raschel, 15mm, 25mm, 35mm, 45mm) of stow net on anchor in the coastal waters of Seocheon after manufacturing five kinds of fishing gears and commercial fishing boat (7.93 tons) was used for it. Anchovy (Engraulis japonicus), southern rough shrimp (Trachysalambria curvirostris), beka squid (Loligo beka), cuttle fish (Sepia esculenta), swimming crab (Portunus trituberculatus) were dominant on the five kinds of experimental fishing gears. Southern rough shrimp was caught from all kinds of fishing gears and catches of anchovy was highest in the raschel codend, southern rough shrimp for 15mm, 25mm, 35mm codend and beka squid for 45mm codend. Bycatch proportion against total catches was 623,376g (28.7%) for 2,171,844g in raschel, 11,932g (1.7%) for 704,451g in 15mm, 3,616g (1.6%) for 221,432g in 25mm, 9,276g (4.9%) for 191,052g in 35mm and 2,724g (5.3%) for 51,431g in 45mm.

본 연구는 해안 염해지 수목 식재를 위한 내염성 및 내조성 수종을 선발하고자 한국 서해안 해안림의 식생조사와 토양염분도를 조사 분석하였다. 조사지의 토양염분은 전체 평균 EC1:5 0.11dSm-1이었고, 최저 0.00dSm-1, 최고 0.68dSm-1이었다. 토양염분(EC1:5)은 해안 정선으로 부터 내륙 방향으로 갈수록 낮았으며, Ⅰ지대〉Ⅱ지대〉Ⅲ지대〉Ⅳ 지대 순으로 각각 EC1:5 0.14dSm-1, 0.11dSm-1, 0.10dSm-1, 0.08dSm-1이었다. 출현한 자생식물은 52과 104속 24변종 157종 총 181분류군이었다. 토양염분이 가장 높은 단계인 EC1:5 0.51dSm-1를 초과하는 곳에서 EC의 특이값 또는 이상치의 수준으로 여러 번 출현하는 수종은 곰솔, 청미래덩굴, 떡갈나무, 졸참나무 등이었다. EC1:5 0.41~0.50dSm-1에서는 EC1:5 0.40dSm-1 이하에 속하는 식물들 이외에도 왕자귀나무, 멀구슬나무, 계요등으로 출현빈도가 매우 낮았다. 전체 지대에 출현하는 수종은 리기다소나무, 소나무, 곰솔, 노간주나무 등 이었고, 중요도가 높은 수종은 소나무, 곰솔, 이대, 청미래덩굴, 굴피나무 등이었다. 이러한 수종은 조사지의 자생 수종들 중에서 다른 수종에 비하여 상대적으로 내조성이 강한 것으로 판단되었다.

Experimental fishing was carried out to compare fishing status according to the codend mesh size (raschel, 15mm, 25mm, 35mm, 45mm) of stow net on anchor in the coastal waters of Seocheon after manufacturing five kinds of fishing gears and commercial fishing boat (7.93 tons) was used for it. Total catches of raschel, 15mm, 25mm, 35mm, 45mm codend were 816,949g, 203,994g, 1,405g, 51,576g, 194g in September and 40,545g, 66,974g, 14,692g, 12,647g, 12,655g in October. Dominance species were anchovy (Engraulis japonicus) in raschel codend, largehead hairtail (Trichiurus lepturus) in 15mm and 35mm in September, and the amount of catches was very small in 25mm and 45mm codend due to the fishing gear damage. In October, dominance species were anchovy and beka squid (Loligo beka) in raschel, 15mm, 25mm codend, and cuttlefish (Sepia esculenta) and beka squid were mainly caught in 35mm and 45mm codend. In addition, total length of anchovy and cardinal fish (Apogon lineatus) were increased according to the increase of codend mesh size but there was no difference in the mantle length of cuttlefish and loligo beka.

1971년부터 2001년까지 해양 및 기상관측 자료를 활용하여 한국 서해에서 기상인자(기온, 바람, 강수량)가 수온과 염분 변화에 미치는 영향을 분석 하였다. 그 결과 수온-기온, 수온-강수량, 염분-풍속은 정상관(+)을, 수온-풍속, 염분-기온, 염분-강수량은 역상관(-)의 관계를 보였다. 기상인자와 해양인자간의 시간지연(time lag)은 표층에서 0~4개월, 저층까지 기상의 영향이 도달하는 데에는 표층보다 0~4개월의 시간지연이 더 있었다. 수온은 같은 해의 기온 변화의 영향을 크게 받는 반면, 염분은 그 직전해의 강수량의 영향을 크게 받았다. 풍속의 강약에 따라 수온, 염분의 변동 폭 또한 함께 변하였다.

서해 배타적경제수역내 해사채취구역에서 해저지형 변화를 규명하기 위하여 2회에 걸쳐 단일빔음향측심기를 이용한 측심자료를 획득하였다. 교차점 분석에 의한 측심자료의 정확도는 IHO 표준의 2등급에 해당하였다. 지형도는 폭 300 m, 깊이 10 m의 구덩이 형태를 나타내었으며, 이러한 지형의 변화 과정이 두 지형도 수심차의 분포에서 표현되었다. 그러나 해사채취량을 정량화하기 위해서는 더욱 정확하고 정밀한 자료가 요구된다. 이러한 지형변화는 퇴적환경 및 저서생태 환경에 영향을 미칠 수 있으므로 한정된 모래자원을 관리하고 지속가능한 개발을 위해서는 과학적인 조사자료에 근거한 환경영향평가가 요구된다.

In this research, airborne chlorides of sea bridges in terms of height were measured every month in the West and South coast for 1 year. The results showed that the decreasing tendency of airborne chlorides to height strongly depends on the maximum amount of airborne chlorides of the target area.

In this study, the impacts of local meteorology caused by tidal changes in the West Sea on ozone distributions in the Seoul Metropolitan Area (SMA) were analyzed using a meteorological model (WRF) and an air quality (CMAQ) model. This study was carried out during the day (1200–1800 LST) between August 3 and 9, 2016. The total area of tidal flats along with the tidal changes was calculated to be approximately 912 km2, based on data provided by the Environmental Geographic Information Service (EGIS) and the Ministry of Oceans and Fisheries (MOF). Modeling was carried out based on three experiments, and the land cover of the tidal flats for each experiment was designed using the coastal wetlands, water bodies (i.e., high tide), and the barren or sparsely vegetated areas (i.e., low tide). The land cover parameters of the coastal wetlands used in this study were improved in the herbaceous wetland of the WRF using updated albedo, roughness length, and soil heat capacity. The results showed that the land cover variation during high tide caused a decrease in temperature (maximum 4.5℃) and planetary boundary layer (PBL) height (maximum 1200 m), and an increase in humidity (maximum 25%) and wind speed (maximum 1.5 ms-1). These meteorological changes increased the ozone concentration (about 5.0 ppb) in the coastal areas including the tidal flats. The increase in the ozone concentration during high tide may be caused by a weak diffusion to the upper layer due to a decrease in the PBL height. The changes in the meteorological variables and ozone concentration during low tide were lesser than those occurring during high tide. This study suggests that the meteorological variations caused by tidal changes have a meaningful effect on the ozone concentration in the SMA.