• 한국농공학회지
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• 제44권2호
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• pp.136-147
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• 2002

Characteristics of unit loads of pollutants were investigated at a paddy fields area(Soro-ri) with large-scaled plots on loam soil during irrigation seasons of 1999 ∼2000. The average irrigation requirement of experimental paddy area are estimated at over 3,000 mm. The unit loads of pollutants in paddy fields area are determined by subtracting irrigation water load from outflow load (percolated and surface outflow loads). Surface outflow load in rainy days was calculated using the relationships of discharge and load, which are grouped into fertilizing and non-fertilizing periods. The ratios of the surface outflow load in rainy days to the total surface outflow load are 16.4% for T-N, 26.8% for T-P, and 23.3% far CODc,. The unit loads of pollutants show month-to-month and year-to-year variations, and monthly unit load of pollutants can show negative values, indicating that the paddy area acts as the pollutants sink. The average unit loads of the pollutants during irrigation seasons were estimated at 18.2 kg/ha fur T-N, 0.31 kg/ha for T-P, and 43.3 kg/ha for CODc,, which are smaller than the reported values for Kosei area in Japan.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2002년도 학술발표회 발표논문집
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• pp.385-388
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• 2002

We investigated net outflow load and unit load of pollutants from a paddy fields area in dry year 2001. Amount of irrigation water in 2001 was about 61-63% of that in previous years 1999 and 2000 due to drought. The net outflow load and unit load of pollutants in 2001 were negative, showing that paddy fields acts as sink of pollutants due to function of water quality purification. The relationship between unit load of pollutants and net surface outflow (= surface outflow - irrigation water) showed positive correlation. The results showed that abatement of surface outflow by appropriate water management contribute to reduce surface outflow load from paddy fields.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2001년도 학술발표회 발표논문집
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• pp.492-496
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• 2001

The purpose of this study is to estimation of pollutants loads using unit load method in Hong-bo watershed. In general, because river water quality management have been conducted with point source pollutant in our country, pollutants caused by precipitation have not been managed well so far. Especially the pollutants tends to concentrate in the reservoir of reclaimed land. Therefore, the reservoir of reclaimed land is need to continuous monitoring and update of an accurate data. also, It is need to improvement of environmental pollution. There are divide into nine sub-catchments and made an estimate of pollutants loads using unit load method in Hong-bo basin. The sample of data was during the 10 years.

• 한국물환경학회지
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• 제24권6호
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• pp.750-757
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• 2008

This study is conducted to characterize and evaluate delivered pollutant loads of point and nonpoint source on the upper watershed of lake paldang. The study area consists of 12 watersheds in Namhan-river and Kyungahcheon, which are approximately 80% of total area of Namhan-river and Kyungahcheon. Based on daily delivered loads from watersheds, 61% of $BOD_5$, 81% of T-N and 70% of T-P were from nonpoint sources, suggesting that delivered loads of nonpoint pollutants be crucial to water quality. On the other hand, 78% of $BOD_5$, 92% of T-N and 87% of T-P as delivered load were from nonpoint sources in an upper watershed of Namhan-river, while 48% of $BOD_5$, 70% of T-N and 57% of T-P as delivered load were from nonpoint sources in a lower watershed of Namhan-river, suggesting higher dependency of point sources than upper watershed of Namhan-river. In the characteristic of delivered loading pollutants from point and nonpoint pollution sources, delivered load of nonpoint pollutants differed significantly by seasonal flow, and as though discharged load of point pollutants were yearly uniform, delivered load of point pollutants was found to be flow-dependent because its delivery ratio was changed.

• 한국물환경학회지
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• 제20권4호
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• pp.333-338
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• 2004

This study was carried out to investigate the generation and discharge characteristics of non-point pollutants from farmlands in Nak-dong river basin. Annual unit generation load of nitrogen and phosphorus by fertilization in the test paddy field was almost similar to those calculated by the fertilization standards of district agricultural technology center, but it was extremely higher in case of the test dry field. By comparing annual total generation load of nutrients from fertilization to the data of fertilizer marketing, the accurate forecasting of generation load of pollutants was achieved by marketing data. The annual total discharge ratio of nutrients through infiltration and overflow from the farmland of the test paddy field were 9.5% and 1.1%, respectively, and those in the test dry field were 22.0% and 0.1%, respectively. The monthly discharge load of nutrients were shown the highest proportioned to the discharge load from lands, but it showed higher in phosphorus, which was caused by the intermittent discharge of phosphorus accumulated in drainage.

• 해양환경안전학회지
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• 제25권1호
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• pp.45-57
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• 2019

수영만 해역의 오염원 관리를 위해 유입되는 육상기인 오염물질의 체류특성을 분석하였다. 오염물질의 체류특성은 해수유동 모델과 입자추적 모델을 활용하여 분석하였다. 오염물질은 입자로 표현되며, 입자의 양과 오염물질량은 비례하도록 나타내었다. 체류특성은 각 오염원별로 부하량, 해역에서 체류하는 오염물질량, 부하량 대비 해역에 체류하는 오염물질량을 비교하여 분석하였다. 수영만 해역에 체류하고 있는 오염물질량을 오염원별 순으로 나타내면 수영하수처리장, 남부하수처리장, 수영강 등의 순이었다. 오염부하량이 적고만 내측에서 멀어질수록 해역에 체류하는 오염물질량이 적었다. 오염원 중에서는 남부하수처리장에서 유입되는 부하량이 가장 많았다. 하지만, 유입 부하량 대비 해역에 체류하는 오염물질량은 수영만으로 유입되는 오염원 중 가장 낮은 값을 보였다. 이는, 해역의 특성과 각 오염원의 지형적인 특성에 따라 오염물질이 해역에 미치는 정도가 다르다는 것을 의미한다.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2001년도 학술발표회 발표논문집
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• pp.460-465
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• 2001

Pollutant load using unit load method is calculated by simply equation, especially, very useful in the area that didn't exist about water quality data. However, it takes long time to calculate pollutant load with area in which there is various pollutants and if the boundary of a basin altered, the work of calculation about pollutant load must be begun from the first again. Therefore, a Total Daily Load Program(TDLP) was developed to calculate pollutant load automatically in rural area. The TDLP includes a geographic information system(GIS), relational database system(RDBS), User Interface. This Program can provide user with creating a boundary of the basin that user is concerned with to satisfy the water quality regulations and calculating daily load for various pollutants. The effort was conducted to apply the developed TDLP to calculating pollutant load in rural basin called Bok-ha river.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2000년도 학술발표회 발표논문집
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• pp.617-622
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• 2000

Concentration of pollutants and discharge were monitored regularly at paddy field area during irrigation periods. The amounts of irrigation water during irrigation water during irrigation periods in 1999 were 3690mm. The concentration of pollutants in ponded water are high during fertilizer application period. The ratio of discharge of direct runoff Q$\_$D/ to the total runoff is 9%. The ratios of the load of direct runoff L$\_$D/ to the total load L$\_$T/ are 6% for T-N, 16% for T-P and 16% for COD. It was found that the ratios of the concentration are 0.7 for T-N, 1.8 for T-P and 1.9 for COD. The unit load of T-N, T-P and COD during irrigation periods were 12.1kg/㏊, 0.42kg/㏊ and 85.7kg/㏊, respectively

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1558-1563
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• 2007

The air pollution by the diesel locomotives has become serious environmental concern because the emission gases are exhausted without any further treatment. Recently, the public interest on the air pollutants emission reduction technology is increasing due to the establishment of 'Metropolitan Air Quality Preservative Law' and the regulation of local governments on the urban air quality. In this study, we measured the concentration of particulate matters and gaseous pollutants by using a scanning mobility particle sizer, a dust spectrometer, and a stack sampler upon various engine load condition. The results show that the amount of emitted air pollutants increased upon the increase of engine power. The development of new technology to reduce the air pollutants emission is urgently required.

• 한국해안해양공학회지
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• 제13권3호
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• pp.237-244
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• 2001

만경강·동진강 유역의 유역정보를 지리정보시스템(GIS) 도구를 이용하여 추출·분석하였다. 수치지도, 토지이용도, 점오염원, 강우량 및 강우관측소 정보, 수질관측소 정보, 원단위 오염부하량 정보를 데이터베이스화 하였으며, 유출량 산정 및 유달부하량 산정의 입력자료가 되는 유역의 경사도, Thiessen 다각형에 의한 강우량, 유역의 COD, TN, TP 발생오염부하량 등의 자료를 산정하였다. 수집·생성된 자료를 분석한 결과, 새만금 유역은 하천 상류유역을 제외하면 대부분이 완만한 평야지대로 g여성되어 있으며, 인구 및 산업시설은 전주, 익산 지역에 집중되어 있는 반면 축산농가는 전 유역에 광범위하게 산재되어 있는 것으로 파악되었다.