• 한국물환경학회지
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• 제26권5호
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• pp.860-870
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• 2010

Long term monthly monitoring data showed that the water quality of streams flowing into Lake Paldang has been improved by various strategy for water. However, the effect of quality on Lake Paldang is still insufficient because of nonpoint source from watershed. In order to evaluate quantifying methods for pollution source and make a suggestion on improvements, Storm Water Management Model (SWMM) was constructed by using data set from the water quality and streamflow monitoring network in the Kyoungan watershed for Total Maximum Daily Loads (TMDLs). Load duration curve (LDC) based on the result of the Kyoungan watershed SWMM indicated that the water quality criterion on $BOD_5$ was often exceeded in up-stream than down-stream. From flowrate-load correlation curve, SS load significantly increased as streamflow increases. 75.3% of streamflow and 62.1% of $BOD_5$ loads is discharged especially in the zone of high flows, but monitoring data set didn't provide proper information about the conditions and the patterns associated with storm events. Therefore, it is necessary to acquire representative data set for comparing hydrograph and pollutograph through monitoring experimental watershed and to establish methods for quantifying point and nonpoint source pollutant loads.

• 한국환경복원기술학회지
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• 제10권6호
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• pp.88-98
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• 2007

The control of nonpoint source pollution from the urban paved areas with high imperviousness in is required to improve the water quality of aquatic resources. This research investigated the characteristics of urban runoffs and evaluate the effectiveness of the continuous deflective separation systems for stormwater best management practice. The systems were installed in the vicinity of a high-level road, an apartment complex, and the Cheonggye stream. Stormwater runoff was sampled in these sites. Biochemical oxygen demand ($BOD_5$), total suspended solid (TSS), total nitrogen (T-N), and total phosphorus (T-P) were analyzed. The removal efficiency of $BOD_5$, TSS, and T-P for the road was 10.9-81.0%, 11.7-93.4%, 0-37.5%, respectively. That of $BOD_5$, TSS, T-N, and T-P for the complex was 12.5-65.8%, 26.5-77.6%, 1.8-28.7%, and 20.0-37.5%, respectively. The abatement efficiency $BOD_5$, TSS, T-N, and T-P for the stream was 7.2-85.2%, 41.7-98.2%, 11.3-65.6%, and 2.0-71.5%, respectively. This study shows that the systems can be used to remove $BOD_5$ and TSS from urban runoffs efficiently.

• 대한공간정보학회지
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• 제1권1호
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• pp.171-180
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• 1993

도시하수와 관련된 비점원 오염에 대한 관심은 더 나은 수질계획을 위한 새로운 도구의 발전을 이끌어 왔다. 이 논문은 도시의 수질연구를 위해 지리정보체계가 어떻게 응용되는지를 보여준다. 지리정보체계는 비점원 오염 모형화를 위한 토지이용자료를 관리하기 위해 이용되고, 또한 여러 가지 형태의 지리적 집합체내에서 오염물질을 평가하는데 이용된다. 경험적인 수질모형은 토지이용에 근본을 둔 오염물질 축적을 평가하기 위해 이용된다. 토지이용범위는 최근 사진의 판독을 통해서 구범위를 갱신함으로써 결정된다. 이러한 토지이용범위는 각각의 토지이용 다각형에 대한 오염물질 축적을 기록하는데 이용된다. 도시하수 유역과 소하수 유역의 범위를 결정하기 위해 하수지도를 수치화 시키고 해석한다. 하수구 소유역층에서 오염물질 축적을 중첩시킴으로써 주요하수의 출구에 대한 오염 축적물이 계산된다. 축적 정보를 기본으로 과다 오염 축적물의 임계지역이 어디에 위치하고 있으며, 오염 축적물을 통제하기 위한 최선의 관리기법의 효율성이 평가된다.

• 한국농공학회논문집
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• 제56권5호
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• pp.21-27
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• 2014

Sediment-laden water is problematic in aquatic ecosystem and for hydraulic structures in a watershed, and agriculture area in a watershed is one of source areas of nonpoint source (NPS), since soil surface typically exposures due to agricultural activities. Especially, severe sediment might flow into stream when agricultural area is located near stream like the Imha-dam watershed. Soil erosion is affected by precipitation, therefore there is a need to consider precipitation characteristics in soil erosion and best management practices (BMPs) simulation. The Web-based Spreadsheet Tool for the Estimation of Pollutant Load (STEPL WEB) allows estimating long-term sediment loads and the impact of best management practices to reduce sediment loads. STEPL WEB and predicted precipitation data by MIROC-ESM model was used to estimate sediment loads and its reduction by filter strip and conversion of agricultural area to forest in the future 30 years. The result indicates that approximately 70 % of agricultural area requires filter strip installation or that approximately 50 % of agricultural area needs to be converted to forest, for 41 % of sediment load reduction.

• 한국토양비료학회지
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• 제46권6호
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• pp.458-462
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• 2013

A drainage ditch is normally a component of drainage networks in farming systems to remove surplus water, but at the same time, it may act as a major conduit of agricultural nonpoint source pollutions such as sediment, nitrogen, phosphorus, and so on. The hybrid turbidity reduction system using biodegradable check dam and synthetic polymer was developed in this study to manage pollutant discharge from agricultural farmlands during rainfall events and/or irrigation periods. The performance of this hybrid system was assessed using a laboratory open channel sized in 10m-length and 0.2m-width. Various check dams using agricultural byproducts (e.g., rice straw, rice husks, coconut fiber and a mixture of rice husks and coconut fiber) were tested and additional physical factors (e.g., channel slope, flowrate, PAM dosage, turbidity level, etc.) affecting on turbidity reduction were applied to assess their performance. A series of lab experiments clearly showed that the hybrid turbidity reduction system could play a significant role as a supplementary of Best Management Practice (BMP). Moreover, the findings of this study could facilitate to develop an advanced BMP for minimizing nonpoint source pollution from agricultural farmlands and ultimately to achieve the sustainable agriculture.

• 한국토양비료학회지
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• 제49권5호
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• pp.440-448
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• 2016

Nonpoint sources of pollution (NPS) is defined as diffuse discharges of pollutants (e.g., nutrient, pesticide, sediment, and enteric microorganism) throughout the natural environment and they are associated with a variety of farming practices. Previous studies found that water soluble anionic polyacrylamide (PAM) is one of the highly effective measures for enhancing infiltration, reducing runoff, preventing erosion, controlling nonpoint source of pollutants, and eventually protecting soil and water environment. Potential benefits of PAM treatment in agricultural soil and water environments have been revealed by many research and they include low cost, easy and quick application, and suitability for use with other Best Management Practices (BMPs) for NPS control. This study reviews the various applications of PAM and discusses its further potentials in agricultural environment.

• 환경영향평가
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• 제23권5호
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• pp.393-405
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• 2014

본 연구에서는 권역별 수질평가 및 비점오염원 배출부하량을 산정하여, 낙동강수계 권역별 비점 오염원 오염도를 평가하고, 우선관리유역 선정 및 향후 관리방향을 설정하였다. 낙동강수계 수질평가를 실시한 결과, 중권역별 BOD농도를 기준으로 Ia등급에 해당하는 중권역이 10개, Ib등급이 6개, II등급이 5개, III등급이 1개 중권역에 해당하는 것으로 나타났다. COD 농도의 경우, Ib등급에 해당하는 중권역이 9개, II등급이 6개, III등급이 6개, IV등급이 1개 중권역에 해당하는 것으로 나타났다. 중권역 내 수질 오염도를 검토하여 오염도 순위를 적용하는 기준으로 하였으며, 그 결과 금호강 중권역, 낙동고령 중권역, 낙동밀양 중권역 및 남강 중권역이 선정되었다. 중권역별 토지계 원단위를 활용하여 비점오염원 배출부하량을 산정한 결과, 가장 많은 비점오염부하량을 배출하는 중권역은 금호강 중권역 으로 17,706.7 kg/day로 나타났다. 낙동강수계 비점오염원에 대한 수질평가 및 부하량 산정 결과 금호강중권역에 대한 비점오염원 관리가 가장 우선시 되어야 함을 알 수 있었다.

• 한국습지학회지
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• 제14권1호
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• pp.89-99
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• 2012

본 연구는 GIS을 활용하여 마산만 특별관리해역 통합관리시스템의 일환으로 마산만의 점 비점오염원 관리시스템을 개발하여 마산만 연안오염총량관리 체제를 보다 체계적이고 과학적으로 이용할 수 있도록 시스템을 구축하였다. 마산만 유역의 오염원 관리에 GIS를 이용한 결과 각 행정구역별 오염원 현황 및 발생 오염부하량의 비교가 가능하였고, 오염부하 산정프로그램을 구축함으로써 배출원별 인구현황, 생활계 물사용량, COD/TN/TP 발생부하량과 배출부하량 등의 오염원 부하량을 행정구역별, 연도별, 용도별로 산정할 수 있었다. 또한 대용량의 속성, 공간자료를 활용함에 있어 시간적, 경제적 노력을 최소화함은 물론 체계적이고 효과적인 마산만 연안오염총량 관리가 가능하여 정책 수립 시 신속한 의사결정에 대한 기여도가 높을 것으로 예상된다. 이 연구결과를 바탕으로 과학적이고 효율적인 점 비점오염원에 관련된 정보와 이에 대한 체계적 관리를 도모하고// 부하량 산정프로그램을 이용하여 오염부하량 변화에 따른 향후 오염원 예측이 가능하도록 유역관리 시스템을 보완해야 할 것이다.

• 한국물환경학회지
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• 제21권4호
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• pp.385-392
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• 2005

The control of nonpoint source pollution is essentially needed to successfully perform the Total Maximum Daily Load program. Of the various land uses in the nonpoint source, the paved areas such as a parking lot and a bridge are stormwater intensive land uses because of high imperviousness and high pollutant mass emissions. This research was performed to understand the magnitude and nature of the stormwater emissions with the purposes of quantifying stormwater pollutant concentrations and mass emission rates from a parking lot and a bridge. Two monitoring sites in Kongju city were equipped with an automatic rainfall gages and an automatic flow meter for accumulating the data such as rainfall, water quality and runoff flow rates. This paper will summarize the metal concentration changes during the storm duration and metal EMCs to characterize the concentration profiles in a parking lot and a bridge. Also a new concept, dynamic EMC, will be proposed to find the relationship between EMC and first flush effect. It can be used to determine the economical treatment criteria in best management practices.

• 환경영향평가
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• 제20권6호
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• pp.857-866
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• 2011

This research categorized EIA target highways into following three types in order to minimize non-point source pollution from highway runoff. 1. Big drainage basin. 2. Small drainage basin. 3. Bridge section. The Natural, Filter and Swirl-Type devices were evaluated in terms of removal efficiency of TSS, BOD, COD, T-N, T-P, compatibility of site selection, economic feasibility, and maintenance convenience through which the final BMP was selected. According to the removal efficiency result, the area of Big and Small Drainage basin and bridge section had higher removal efficiency with natural facility than that of the Filter or Swirl-Type device. To make appropriate selection of highways'BMP for non-point source pollution, this study will aim to contribute to building more environmentally friendly highways by proposing the selection process that is made of 5 stages. 1. Selecting the target drainage basin. 2. Selecting the land for the mitigation facility. 3. Analysing the ease of maintenance. 4. Technically evaluating each installation. 5. Evaluating the effective implementation methods.