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기서진,김경호,이현규,신경희 대한환경공학회 2017 대한환경공학회지 Vol.39 No.12
This study aims to provide the technical considerations and implications for the development of soil vulnerability assesment tool based on the review of existing tools and case studies applied both domestically and internationally. For this study, we specifically investigated the basic theories and major features implemented in the screening models abroad. In contrast, one case study of prioritizing the vulnerable districts was presented to identify the research trends in Korea. Our literature review suggested that the characteristic of target areas and contaminants needed to be properly incorporated into soil vulnerability assessment because the current tools in Korea neglected these properties which prevented this tool from being used as a correct measure of soil management and prevention. We also reached the conclusion that in terms of technical aspect, the soil vulnerability assessment tool should be developed based on the physical theory and environmental data that were varied over space and time so that the end-users were able to readily and effectively screen soil vulnerability over large areas. In parallel with technical improvement, great effort needed to be devoted to develop an integrated environmental information system that increased the availability of data and shared various types of environmental data through enhanced multi-agency collaboration. 산업 구조의 고도화와 토지이용의 다변화에 따라 토양 오염의 형태가 다양화되고 있으며 효과적인 사전 대응계획을수립하기 위해서 토양 오염 취약성을 고려되어야한다. 국외의 경우 다양한 평가 도구가 존재하며 평가 결과를 정책적 의사결정 과정에 적극적으로 활용되고 있지만, 국내의 경우 취약성 평가 도구가 지하수 분야에 집중되어 있으며 토양 취약성 개념 정립 및 도구와 관련된 연구가 매우 미흡한 실정이다. 따라서 본 연구에서는 국내외 토양 취약성 평가 도구를 조사하고관련 연구 사례를 검토하여 토양 취약성 평가의 국내 도입시 고려해야 할 사항과 시사점을 도출하고자 한다. 이를 위해 취약성 평가에 대한 개념을 정리하고, 국외에서 활용되고 있는 WIN-PST, SCI-GROW, USGS의 통계모델, CLERS, EuroPEARL 모델, 메타 모델 등 취약성 평가 도구에 대한 개요 및 특징을 조사하였으며 우선관리지역 평가 사례를 통해 국내의 연구 동향을 파악하였다. 국내외 사례를 분석한 결과, 오염의 사전관리 및 예방을 위한 도구로서 취약성 평가 방법론을 도입하고자 한다면 지역 및 오염원 특성을 고려한 특정 취약성 평가의 개념을 도입하는 것이 적절한 것으로 나타났다. 또한 기술적 측면에서 국내의 토양 오염현상을 현상학적으로 평가 가능하고 시공간적으로 변화하는 환경정보를 반영하여 사용자가 광범위한 지역을 쉽고 정확하게 평가할 수 있는 도구 개발이 필요할 것으로 판단되며, 정책적 측면에서 유관기관과의 협조를 통해 다양한 환경 정보의 공유를 활성화할 수 있는 인프라 체계를 구축하는 노력이 지속적으로 필요할 것으로 판단된다.
낙동강 하류 유역 농업용 양배수지와 배수지의 수질특성 및 오염부하량 산정
기서진,박현건,안상준,유도건,이춘식 한국수처리학회 2019 한국수처리학회지 Vol.27 No.6
Agricultural detention basin refers to river facilities which temporarily retain runoff from agricultural area and then rushes the polluted runoff into nearby streams or reuse it for irrigation as needed, and should be monitored to efficiently protect river water quality. The objective of this study is to provide optimal management strategies for agricultural pumping and drainage facilities as well as drainage facilities operated along the lower Nakdong River by assessing their water quality profiles as well as pollution loads. A short-term monitoring campaign extending over three months was conducted in the period from September 2018 to November 2018 to measure water quality and flow rate in a total of 68 facilities and the pollution loads in the river mainstream were compared with those estimated from both monitoring and modeling results. Results showed that 8 facilities out of 68 ones needed intensive management plans according to the criteria of TP above 0.03 mg/L and TN above 10 mg/L and there was no significant difference in water quality among inlet, outlet, and storage stations, including all stations, for individual facilities. However, the pollution loads estimated from agricultural pumping and drainage facilities as well as drainage facilities were significantly lower thant those in the mainstream, which was mainly attributed to the limited monitoring survey and modeling results. We expect that reinforced survey of pollutant source information on the upstream watershed and advanced input data to the model enable not only a more precise estimation of pollutant loads, but also good management practices of existing and future agricultural pumping and drainage facilities as well as drainage facilities.
남강 상류 유역 시설하우스 유출수의 하천 오염기여도 평가
기서진 ( Seo Jin Ki ),서상익 ( Sang-ik Suh ),이춘식 ( Chun-sik Lee ) 한국환경기술학회 2021 한국환경기술학회지 Vol.22 No.4
This study was done to address the effect of greenhouse cultivation effluents on river waters in the Upper Nam River Basin. We measured flow rate and six water quality parameters at the final outlet of the greenhouse cultivation during eight rainfall events randomly occurred between October 2019 and April 2021 which were provided as input to a popular watershed modeling tool SWAT. The years 2012-2014, 2015-2016, and 2017-2018 were set as the warm-up, calibration and validation periods, respectively. Our findings showed that a good model performance was achieved for discharge prediction reaching minimum R<sup>2</sup> values of 0.65, which was followed by sediments, NO<sub>3</sub>, ORGP, and BOD. Annual pollutant loads estimated from the monitoring data were slightly lower than the land-based (unit) pollutant loads. Accordingly, the pollutant load contributions to receiving waters were underestimated by 6.35 % (for BOD), 1.86 % (for T-N), and 3.09 % (for T-P). In addition, pollutant movement, described as the delivery ratio of pollutant loads, varied largely across 18 river segments for BOD and but to only a small extent for T-N and T-P. This calls for more sophisticated monitoring and modeling efforts to develop customized water management strategies along the river segments.