• 한국물환경학회지
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• 제25권1호
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• pp.26-36
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• 2009

Combined sewer system (CSS) has been built in the most urban areas across the nation. During dry weather conditions, CSS works fine. But during heavy rain storms, combined sewage frequently overflows into the stream. This study simulated the hydrologic cycle and pollutant loads (BOD, SS, TN and TP) in the Mokgamcheon watershed considering combined sewer overflows (CSOs). PC storm water management model (PCSWMM) was used for continuous simulation and CSOs are considered using the flow divider. Sensitivity analysis, calibration and verification for water quantity and quality are carried out. To verify CSOs, field measurements of CSOs are compared with simulated results. As a result, 41.3% of precipitation flows into the stream directly and 1.1% of water supply flows into stream as CSOs. 6.5% of BOD total loads, 12.0% of SS, 13.6% of TP, and 29.2% of TN are from CSOs. This result will be effective to the integrated watershed management for sustainability.

• 한국대기환경학회지
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• 제29권4호
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• pp.459-476
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• 2013

Receptor models have been rapidly developed to manage the ambient air quality and to establish effective emission reduction strategies. The models are used to identify various emission sources and apportion quantitatively the ambient pollutant mass based on various measured physico-chemical properties of the air pollutants at the receptor site. Many types of receptor models have been applied to estimate source contributions since those provide fundamental information when establishing reasonable environmental policies in Korea and Foreign countries. In this paper, we will introduce the basic concept and principal of the receptor model, various types of existing models with discussing strong and weak points for each model, and performance procedure of PMF model as the most popular model in the world. Further the trends of receptor modeling studies in Korea and other countries were provided. Finally, the improvement directions of the modeling works for the national and local air quality management were suggested in this paper.

• 한국물환경학회지
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• 제20권6호
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• pp.641-646
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• 2004

Vehicle emissions from highway landuse include different pollutants such as heavy metals, oil and grease and particulates from fuels, brake pad wear and tire wear. Since highways are impervious and have high pollutant mass emissions from vehicular activity, it is considered as stormwater intensive landuses. Therefore this research was performed to understand the magnitude of first flush and to suggest the criteria of first flush for storm runoff management in highways. The fractions of washed-off mass are very high in first 30% of runoff volume, which suggests a definition of first flush. The washed-off mass stabilizes after 30% of the runoff volume and it is apparent that treatment capacity in the early part of a storm is more valuable than treatment capacity in the later part of the storm. Using the criteria of "high" first flush and "medium" first flush, as 50% of the mass in the first 30% of the volume, and 30 to 50% in the first 30% volume, respectively, more than 30% of the storms showed high first flush. A "first flush friendly" best management practice(BMP), meaning a BMP that can treat a high percentage or all of the initial flow, would be advantageous up to 80% of the events.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2000년도 학술발표회 발표논문집
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• pp.536-542
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• 2000

The purpose of this study is to evaluate the effect of stream quality by the farmer＇s livestock wastes management in a typical small agricultural watershed. AGNPS model has the capability to adjust the level of pollutant load from farmstead and the fertilization level of upland field. A small agricultural watershed(4.12 $\textrm{km}^2$) which has as livestock farmhouses located in Gosan-myun, Ansung-gun was selected. AGNPS data were prepared by using Arc/info and Idrisi. 4 storm events in 1999 was used for runoff calibration, and 2 storm event which is measured in hourly-base at 4 locations along the stream were used for water quality(TN, TP) calibration. Model＇s behavior to stream quality for 3 cases was investigated. First, the variation of pollution produced from the cattle shed affected little to the stream quality because the cattle sheds were roofed. Second, the good management of ground in farmstead affected to stream quality with 11% and 17% decrease in TN and TP, respectively. Third, the reduction of fertilization level to upland field affected to stream quality with 27.2% and 38.5% decrease in TN and TP, respectively.

• 한국환경보건학회지
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• 제27권2호
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• pp.100-107
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• 2001

On the planning for the systematic management and control of the air pollution display methods were used to evaluate the spatial pollutant concentration status. This study were conducted to investigate the practical using of Geographic Information System(GIS) technology on the air pollution control and management which were computer-based systems that were used to store and manipulate geographic information in the macro city. In this study 137 samples were corrected by passive samplers and analysed by GC/MSD for 16 VOCs in Seoul (25 distincts) distributed by TM-coordinate(2 km$\times$2km), and finally displayed by Arciew program(version 3.2, ESRI Inc, USA) for windows. The concentration of benzene and toluene showed high level in whole area of seoul area of Seoul and distribution of butylbenzen, trothroloetylene, stylen showed high level in whole area of Seoul except a few distincts and the distribution of isopropylbenzene, 1,2-dichroloethane showed higher level in core area than that of Kangnam and Kangbuk area. In conclusion, products of this study of using GIS technology apply on the spatial distribution of VOCs concentration was very effective than that of other methods(e.g., contouring concentration method, pie or column chart, graduated symbols), especially in mapping and symbolization of pollution status evaluation.

• 공업화학
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• 제23권6호
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• pp.618-623
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• 2012

석유의 누출로 인해 토양과 지하수 오염이 점차 증가되면서, 토양환경에 대한 중요성이 점차 늘고 있다. 토양오염은 다른 환경오염에 비해 정화비용이 비싸며, 긴 정화기간이 요구된다. 본 연구에서는 토양오염을 발생시킬 수 있는 대표적 석유제품에 대한 물성분석과 함께 토양에 누유시킨 뒤, 석유계 총탄화수소화합물의 스펙트럼 패턴을 분석함으로써 유종들의 특성을 분석하였다. 이는 추후 석유에 의한 토양오염 발생 시, 어떤 석유제품에 의한 오염인지 쉽게 판단이 가능할 것이다.

• 대한안전경영과학회지
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• 제19권4호
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• pp.149-155
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• 2017

This study is analyzed combustion phenomena based on the environmental energy facility incinerator. It is assumed that combustible components of waste are composed of carbon and hydrogen, and the combustion process of fuel is by setting as multi-component / multistage reaction. As the combustion chamber is burned, the high temperature environment is achieved, also the heat transfer accompanied by the turbulent flow and the generation of NOx, a pollutant, are interpreted to predict the thermal and fluid characteristics and pollution emissions of the grate incinerator. As the result of internal flow analysis, the slow flow around the ash chute and the mixing effect due to the complicated turbulence around the combustion chamber were predicted to show excellent performance. It is shown to the internal average temperature was about $1024^{\circ}C$, around the about $1000^{\circ}C$ homogeneous temperature distribution. Due to the sudden temperature decrease in the boiler, the flue gas temperature at the outlet was estimated to be about $220^{\circ}C$.

• 한국재난관리표준학회지
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• 제2권1호
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• pp.65-74
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• 2009

환경재해방지와 대기오염관리를 목적으로 GIS기반의 대기 오염관리시스템 즉 높은 시 공간적 해상도의 오염물질배출량 산정과 영향예측, 자료관리 및 분석 등이 가능한 지리정보시스템을 구성하였다. 사례연구는 다양한 오염원의 존재하여 대기오염물질 배출량 증가로 인하여 환경재해의 가능성이 상존하는 광양만지역을 선정하고, 대기오염관리시스템에 오염원의 속성 공간자료체계를 구축과 배출모형, 대기오염모델, 분석도구 등을 이용하여 배출량 산정과 영향예측, 분석 등을 수행하였다. 분석결과, 산정된 배출량이 대상지역 오염원의 위치와 오염물질의 배출특성, 공간분포와 일치하는 정확한 예측결과를 나타내었다. 또한, 대기 오염모델의 TSP 예측결과는 실측값과 상관계수가 0.75로서 다소 높은 상관도와 오염원 영향농도와 범위 등의 파악에서 명확한 분석기능이 제공되는 것으로 나타났다, 본 연구에서 개발된 대기 오염관리시스템은 신속한 공간 속성 자료체계(database)의 구축과 높은 시 공간적 해상도의 배출량 산정, 대기오염모델의 입력자료 생성, 영향예측, 다양한 결과분석 등이 가능하여 합리적인 대기오염관리의 분석도구로서 사용될 수 있을 것으로 사료된다.

• 지질공학
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• 제16권4호
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• pp.373-379
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• 2006

우리나라에서 하천에 유입되는 유기물부하의 많은 부분을 차지하는 산업폐수를 대상으로 유기물 오염지표간의 상관성을 조사하였다. 기존 사용되고 있던 COD와 BOD를 현재 많은 국가에서 도입하고 있는 TOC와의 관계를 규명하였다. 업종별 업체별로 그 상관계수에는 큰 차이가 있었으며, 최고의 상관계수는 음식료품 생산업체의 방류수 중에 함유된 COD/BOD/TOC와의 관계에서 나타났다. 각각의 상관계수는 COD/BOD: 0.997, COD/TOC : 0.969, BOD/TOC: 0.990이었다. 상관계수가 낮은 경우도 많았으며, 동일업종이라 하더라도 상관도에는 일관성이 없었다. 그러므로 수질기준 책정 또는 하천수질 모니터링 등에 기존의 유기물질지표의 대체지표로써 TOC를 사용하는 것은 불가능할 것으로 사료된다. 그러나 이들의 상관도가 높은 방류수의 관리에 있어서는 유용하게 사용될 수 있으므로 이들 유기물질 인자간의 상관성을 검토하여 개별적으로 사용하여야 할 것이다.

• 한국수자원학회논문집
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• 제42권12호
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• pp.1091-1102
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• 2009

본 연구는 기후변화와 토지이용 변화로 인한 물순환 영향을 분석하기 위해 통계학적 축소모형(SDSM), 연속유출모형인 HSPF 모형, 불투수면 모형을 결합하는 통합접근법을 제시하였다. 이러한 기법을 안양천 유역에 적용하여 치수, 이수, 수질관리 측면에서 기후변화와 토지이용변화에 대한 영향을 분석하였다. 평가 기준은 유황곡선과 오염물질 농도 지속곡선이며 기후변화 시나리오 3개 (현재, A1B, A2)와 토지이용변화 3개, 총 9개의 시나리오에 대해 HSPF 모형을 이용하여 분석하였다. 그 결과 기후변화는 유출량에 대한 영향력이 크고 토지이용변화는 농도 변화에 크게 영향을 미치는 것으로 나타났다. 따라서 지속가능한 유역관리, 수자원관리를 위해 도시화와 기후변화에 대한 영향을 동시에 고려하는 것이 바람직하다.