• 한국관개배수논문집
• /
• 제14권2호
• /
• pp.181-193
• /
• 2007

The characteristics of non-point source pollutant loads in middle-stream of Nakdong River Were studied through analysis of pollutant loads of 8 sub-watersheds divided based on administrative district. The pollutant concentration of each sub-watershed was collected from Nakdong-River Water Research Institute and Daegu Regional Environmental Office, respectively. Pollution items analysed in this study were BOD, SS, T-N and T-P. High degree of non-point pollution was observed from Gumi, Goryeong, Gyeongsan, Daegu and Sungju, and pollution was usually increased during rainy season. This result indicates that a given pollution condition within the watershed can be more sensitive than location factor to the level of water quality. The main sources of non-point pollution were population and livestock, as well as landuse factor, and were found to significantly contribute to the water pollution. Alternative solutions for controlling pollution sources, therefore, should be provided to meet target levels of water quality in this region.

• 한국재난관리표준학회지
• /
• 제3권1호
• /
• pp.51-60
• /
• 2010

본 연구는 선행연구들의 하천 유역 오염물질 및 오염도 분석결과를 바탕으로 하천 오염도와 지반 오염물질 간의 상호관계에 대해 분석하였다. 크게 도시 및 산업지구 인접 하천인 낙동강, 태화강, 안양천과 농 축산지 인접 하천인 영산강, 미호천으로 구분해 연구하였으며, 대상 오염원은 중금속 오염물질로 한정하였다. 도시 및 산업지구 인접 하천의 경우 중금속 오염물질 함유량이 일치하여 상관성을 보였으나 농 축산지 인접 하천의 경우 불일치하여 상관성을 밝히기 어려웠다. 도시 및 산업지구 인접 하천의 경우 점오염원의 영향을 많이 받기 때문에 지반오염에도 직접적인 영향을 미친 것을 알 수 있었고 농 축산지 인접 하천의 경우 점오염원보다 비점오염원의 영향을 많아 하천오염도와 지반오염의 상관성이 적은 것으로 나타났다.

• 상하수도학회지
• /
• 제25권2호
• /
• pp.265-274
• /
• 2011

Nowadays, the importance of non-point source pollution treatment is being emphasized. Especially, the easy runoff characteristic of highly concentrated pollutants in the roads makes the circumstance more complicated due to impermeability of roads. When the pollutants flow into steam it could make water quality in stream worse and it also causes a bad influence in the aquatic ecosystem because the effluents of rainfall-runoff may contain indecomposable materials like oil and heavy metals. Therefore, we tried to figure out the property of non-point source pollution when it is raining and carried out an assessment for the property of runoff for non-point source pollution and EMC (Event Mean Concentrations) of the essential pollutants during this study. As the result of the study, the EMC was BOD 5.2~21.7 mg/L, COD 7.5~35.4 mg/L, TSS 71.5~466.1 mg/L, T-N 0.682~1.789 mg/L and T-P 0.174~0.378 mg/L, respectively. The decreasing rate of non-point pollutant in Chungyang-Hongsung road indicates the maximum decrease of 80% until 5 mm of rainfall based on SS concentration; by the rainy time within 20~30 minutes, the decreasing rate of SS concentration was shown as 88.0~97.6%. Therefore it was concluded that it seems to be possibly control non-point pollutants if we install equipments to treat non-point pollutants with holding capacity of 30 min. It is supposed that the result of this study could be used for non-point pollutants treatment of roads in Chungyang-Hongsung area. We also want to systematically study and consistently prepare the efficient management of runoff from non-point source pollution and pollutant loading because the characteristics of non-point source pollution runoff changes depending on different characteristics and situations of roads and rainfall.

• 한국관개배수논문집
• /
• 제13권2호
• /
• pp.283-292
• /
• 2006

The characteristics of nonpoint source pollutant loads in upstream of Nakdong River were studied through analysis of pollutant loads of 10 sub-watersheds divided based on administrative district. The discharge and pollutant concentration of each sub-watershed were collected from Nakdong-River Water Research Institute and Daegu Regional Environmental office, respectively. Pollution items analysed in this study were BOD, T-N and T-P. The delivery loads of the nonpoint source pollutions of each sub-watershed were calculated after analysing the concentration of the pollution of each site. Several points were found from the results. Firstly, in general, city areas including Sangju, Andong showed higher degree of nonpoint pollution than country areas including Cheongsong, Yeongyang. The sub-watersheds located upstream side, such as Yeongju, Bonghwa, Necessarily show better water quality than the sub-watersheds located downstream side, such as Mungyeong, Uiseong. This result indicates that a given pollution condition within the watershed can be more sensitive than location factor to the level of water quality. Secondly, the delivery load and area of watershed were not necessarily correlated in the sense of water quality, while the discharge was shown to be highly correlated to the delively load of pollution. Lastly, sewage and waste caused from population and livestock, as well as landuse factor, were found to significantly contribute to the water pollution. Alternative solutions for controlling pollution source, therefore, should be provided to meet target levels of water quality in these regions.

• 도시과학
• /
• 제8권2호
• /
• pp.7-12
• /
• 2019

In this study, the DongPieHong Ditch were taken as the research object, five sampling points were set to measure the COD, NH₃-N,TNandTPindexes. The correlation and principal component analysis were used to judge the main pollution sources and calculate pollution contribution rate. According to the population in the basin, the load of point source pollution into the river was estimated. As a result, the load of COD, NH₃-N and TP into the river was 323.04t/a, 43.8t/a and 3.9t/a, respectively. According to the statistics of the rainfall in the basin, the concentrations of COD, TP and NH₃-N in the initial rainwater were measured and calculated for non-point source pollution, and the results shown that the inflow loads of COD, NH₃-N and TP into the river were 34.59t/a, 0.12t/a and 0.71t/a, respectively. It was found that the main cause of the pollution in the east flash flood gully was point source pollution, and the proportions of COD, NH₃-N and TP into the river were 90.33%, 99.72% and 84.61%, respectively.

• 한국대기환경학회지
• /
• 제16권2호
• /
• pp.121-128
• /
• 2000

To identify the effects of air pollution on several physiological characteristics of Styrax japonica in Yeochon industrial comples soil properties photosynthetic capacity and chorophyll contents were investigated. All of these measurements were taken on Styrax japonica stand at 1. 3 and 7km from an industrial complex which is an air pollution source. In addition a Styrax japonica stand in Sang-ju city was selected as a control Each physiological measurement was in leaves of east-, west- south- and north-facing branches. The results obtained were as follows: 1) Al contents of soil in Yeochon industrial complex were higher than those of Sang-ju city a non-polluted area. higheral contents contributed to decrease in soil pH. 2) Chlorophyll contents of leaves at 1km from the industrial complex closest from the air pollution source were lower than those of 3 and 7km/ 3) Photosynthetic capacity of Styrax japonica at 1km from the air pollution source was lower than those at 3 and 7km.

• 대한환경공학회지
• /
• 제35권9호
• /
• pp.643-653
• /
• 2013

본 연구에서는 불투수성 지역에서 강우시 비점오염원 유출특성을 파악하고, 다양한 해석방법을 통하여 비점오염물질의 초기유출현상을 규명하고자 하였다. 불투수성 지역에서의 강우사상 특성은 강우강도의 영향을 많이 받는 것으로 나타났으며, 강우강도가 크면 초기유출현상이 뚜렷하게 나타나는 것으로 나타났다. 또한 선행무강우일수에 의해서 비점오염물질의 농도차가 큰 것으로 나타나, 이에 대한 대책 마련이 필요할 것으로 판단된다. 비점오염원의 초기유출에 의한 감소율(DR) 평가 결과, 강우시 불투수성 지역에서의 비점오염 유출특성은 건기시 불투수면에 집적되어 있던 비점오염물질이 초기강우에 의해 높은 농도로 유출되는 경향을 보였기 때문에 초기강우로 인한 비점오염물질에 대한 대책을 마련하는 것은 중요하고, 이와 관련하여 비점오염 처리시설에 대한 용량 산정에 대한 평가도 필요할 것으로 판단된다. 초기유출에 의한 감소율(DR) 경향 분석은 비점오염물질에 대하여 감소율(DR) 50%를 기준으로 조사지점별 강우유출시간을 분석하였는데, TSS는 15~60 min으로 나타났으며, 유기물질은 30~90 min으로 나타나는 경향을 보였지만 강우유출이 끝날 때까지도 감소율(DR)이 50% 이하인 특성도 나타났다. 이를 근거로 하여 향후 구조적 BMPs 시설 설계 시 참고자료로 활용할 수 있을 것으로 판단된다.

• 한국지하수토양환경학회:학술대회논문집
• /
• 한국지하수토양환경학회 2003년도 추계학술발표회
• /
• pp.279-281
• /
• 2003

This study is intended to give information on agricultural nonpoint source pollution and transport related to fertilizer application and irrigation practice. Field-simulated soil columns were set up and leaching studies on fertilizer components such as nitrogen and phosphorus were performed. Nitrogen and phosphorus in the leachate showed different trends in each column and nonpoint source pollution in agricultural areas may be expected to depend on planted crops, soil conditions, and climate as well as irrigation and fertilizing management.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
• /
• pp.229-233
• /
• 2007

This study is to test the applicability of QuickBird image for non-point source pollution assessment. SWAT (Soil and Water Assessment Tool) model was adopted and the model was calibrated for a stream watershed of 255.4 $km^2$ Landsat land use data. For model application with QuickBird image, a precise agricultural land use map of 1.16 $km^2$ area located in the upstream watershed was produced by field investigation. The model was run with the combination of land use and soil map scales (1:5,000, 1:25,000 and 1:50,000). The results were compared and analyzed for the contribution of non-point source pollution by the land use scale and contents.

• 한국농공학회:학술대회논문집
• /
• 한국농공학회 2005년도 학술발표논문집
• /
• pp.637-642
• /
• 2005

The objective of this study is to evaluate design parameters of free water surface constructed wetland for the reduction of agricultural nonpoint source pollution. From literature review, the key design parameters were selected as influent concentration, influent water volume, hydraulic retention time and wetland system arrangement. The design value for each parameter was established after pilot study. Full-scale constructed wetland on the basis of the designed values was constructed to evaluate those reasonableness. The results of this study showed that the designed values for free water surface constructed wetland were appropriate for the reduction of agricultural nonpoint source pollution.