Fossil fuel combustion during fishing activities is a major contributor to climate changes in the fishing industry. The Tier1 methodology calculation and on-site continuous measurements of the greenhouse gas were carried out through the use of fuel by the coastal and offshore gillnet (blue crabs and yellow croaker) and trap (small octopus and red snow crab) fishing boats in Korea. The emission comparison results showed that the field measurements are similar to or slightly higher than the Tier1 estimates for coastal gillnet and trap. In offshore gillnet and trap fisheries, Tier1 estimate of greenhouse gases was about 1,644-13,875 kg CO2/L, which was more than the field measurement value. The CO2 emissions factor based on the fuel usage was 2.49-3.2 kg CO2/L for coastal fisheries and 1.46-2.24 kg CO2/L for offshore fisheries. Furthermore, GHG emissions per unit catch and the ratio of field measurement and Tier1 emission estimate were investigated. Since the total catch of coastal fish was relatively small, the emission per unit catch in coastal fisheries was four to eight times larger. The results of this study could be used to determine the baseline data for responding to changes in fisheries environment and reducing greenhouse gas emission.

본 연구에서는 현장에서 실측된 유량 및 수위로부터 산정된 조도계수의 오차를 분석하고 그 타당성과 한계를 검토하였다. 자연 하천흐름을 등류로 가정하여 산정된 조도계수는 저유량 규모에서 부등류로 계산된 조도계수와 큰 차이를 나타내었으며, 이는 속도수두의 차이보다 평균 단면적, 동수반경 등 단면정보에 크게 영향을 받았다. 상대적으로 긴 구간에서 홍수량 규모의 평균 조도계수 산정에서는 구간 상하류만의 수위 자료를 이용하여 조도계수를 산정하는 수정 Newton-