• 한국습지학회지
• /
• 제19권3호
• /
• pp.287-295
• /
• 2017

본 연구에서는 금호강의 수질 및 유량 자료를 이용하여 첨두수질에 따른 강우유출 특성을 분석하고 모니터링 및 오염원별 관리 시기 등의 비점오염 관리 방향을 도출하였다. 첨두수질농도(Peak Water Quality Concentration)는 강우유출수내 수질이 가장 높은 농도로 비점오염 관리 기준농도로 극값(Extremal value)을 활용하는 개념이다. 이 방법을 이용하여 누적강수량(총강수량), 첨두수질농도, 첨두수질농도까지의 누적강수량, 첨두수질농도까지의 시간, 첨두수질농도까지의 EMC 등의 평가인자를 검토하였고 장기간에 걸친 실측자료를 이용하여 비점오염원 강우유출특성을 분석하였다. 분석 결과를 통해 비점오염원을 관리하기 위한 적정 모니터링 및 관리방안을 제시하였다.

• 한국관개배수논문집
• /
• 제16권1호
• /
• pp.20-29
• /
• 2009

• 한국수자원학회:학술대회논문집
• /
• 한국수자원학회 2001년도 학술발표회 논문집(II)
• /
• pp.826-832
• /
• 2001

• 물과 미래
• /
• 제22권4호
• /
• pp.413-414
• /
• 1989

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

• 한국환경과학회지
• /
• 제7권6호
• /
• pp.845-851
• /
• 1998

In order to manage the water quality from the flowing streams in Cheju Island, the characteristics of water quality was investigated from August, 1996 to May, 1997 and the pollutant loadings for future were estimated from the watershed at each stream. Comparing the mean concentrations of each water quality with the criterion of water quality in river, it was under I class except for Changgo Stream, for DO, under I class at the whole station for SS and under II class for BOD. As the pollutant loadings at each stream in 2020 is compared with those in 1996, the estimated results are as follows : 1) for BOD, 59% at Donghong Stream, 24% at Yeonoe Stream, 44% at Ohngpo Stream and 57% at Changgo Stream. 2) for T-N, 91% at Donghong Stream, 76% at Yeonoe Stream, 63% at Ohngpo Stream and 89% at Changgo Stream. 3) for T-P, 69% at Donghong Stream, 42% at Yeonoe Stream, 45% at Ohngpo Stream and 73% at Changgo Stream. The point source loadings discharged through combined sewer could be treated at sewage treatment plant. However, the expected slow decreasing rate of BOD, T-N, and T-P loadings is due to the part of untreated nonpoint source loadings. Nonpoint source loading overflow typically occurs when the flow of stormwater combined with sewage exceeds the capacity of the interceptor sewers. Since most of the sewers used in Cheju Island are the combined sewers, the combined overflow sewage is bypassed into the receiving water area after a rainstorm. Therefore, a means to control nonpoint source loadings should be considered for the river and marine water quality management.

• 한국습지학회지
• /
• 제19권3호
• /
• pp.296-302
• /
• 2017

일반적으로 주차장은 아스팔트나 콘크리트 등 불투수층으로 조성되기 때문에 강우시 각종 오염물질이 수계로 배출됨에 따라 비점오염원 배출 부하량을 증가시키는 중요한 요인이 된다. 불투수층으로 인한 물순환장애 및 비점오염원 관리를 효과적으로 제어하고 관리할 수 있는 저영향개발(Low Impact Development)의 적용 및 필요성이 대두되고 있으며, 환경부는 개발사업에 대해 저영향개발 기법의 적용을 의무화하는 방안을 추진 중에 있다. 본 연구에서는 효율적인 빗물 및 비점오염원 관리를 위한 저영향개발 기법의 하나인 투수성 주차장에서 발생하는 강우 유출수의 오염물질 농도, 비점오염부하량, 초기세척현상 및 강우유출지연효과를 불투수성 주차장과 비교 분석하여 향후 투수성 주차장 설계시 기초자료로 활용할 수 있도록 하였다.

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

• 한국농공학회논문집
• /
• 제46권5호
• /
• pp.141-153
• /
• 2004

Wetland system is widely accepted as one of natural water purification systems around the world for nonpoint sources pollution control. Constructed wetlands have become a popular technology for treating contaminated surface and waste water. In this study, the field experiment to reduce nonpoint source pollution loadings from polluted stream waters using wetland system was performed from June 2002 to March 2004. Four wetlands were used and the size of each one was 0.8ha. Water of Dangjin stream flowing into Seokmun estuarine reservoir was pumped into wetlands. Inflow and hydraulic residence time of the system was 500 $m^3$/day∼1,500 $m^3$/day, 2∼5 days, respectively. After 2 year operation, plant-coverage of the wetlauds was about 70% from bare soil surface at initial stage . Average water quality of the influent was $BOD_5$ 4.17 mg/L, TSS 18.45 mg/L, T-N 4.32 mg/L, and T-P 0.30 mg/L. The average removal rate of $BOD_5$, TSS, T-N and T-P during the study period was 5.6%, 46.6%, 45.7%, and 54.8%, respectively. Organic ($BOD_5$) removal rate was low and the reason might be low influent concentration. Wetland removal rate of T-P was about 10% higher than T-N. Performance of the experimental system was compared with existing data base (NADB), and it was within the range of general system performance. Overall, the wetland system was found to be adequate for treating polluted water stream with stable removal efficiency even during the winter period. Most of the nonpoint source pollutions from watershed are transported by streams or ditches, and they could be controled by constructed wetland system before entering the lake or reservoir.

• 한국환경보건학회지
• /
• 제35권3호
• /
• pp.220-225
• /
• 2009

This study evaluates the water quality of the river near the alpine farmland in the upper Naerin stream, which is a typical stream of the upper Bukhan River with muddy water generation, by the flow examination, it aims to estimate the characteristics of nonpoint sources flowing out from the investigated area and figure out effective methods to reduce them. According to the result of water quality examination, the average BOD of the area not affected by the cultivated land among the areas of the upper Naerin River was 0.47mg/l, and total phosphorous was 0.007mg/l; thus, it maintained the cleanliness level of Ia. The average BOD of the area with the alpine farmland was 0.52mg/l, which was similar to the one of the non-cultivated land. But total phosphorous concentration was 0.023mg/l, which was more than three times higher than the area belonging to level II due to the effect of fertilizer ingredients discharged from the cultivated land. About the loadings of the investigated area generated from each of the pollution sources, BOD was 878.5kg/day and total phosphorous was 79.7kg/day. Moreover, for the load density, BOD was $2.22kg/day.km^2$ and total phosphorous was shown as $0.20kg/day.km^2$. Regarding the rates generated from nonpoint sources like land among the loadings per pollution sources, BOD was 54%, total nitrogen was 91%, and total phosphorous was 73.4%. Therefore, it was shown that most of the nutrients were produced from the nonpoint sources. The level of BOD runoff loading in the Jaun River area, where nonpoint sources were mainly generated, was 37.1kg/day and total phosphorous was 1.33kg/day. The flow rates to the generated amount were estimated as 10.5% and 4.7% each.