원단위를 이용한 낙동강유역 비점오염 배출특성 분석

전지홍,장태권,황하선,최동혁,김태동 한국도시환경학회 2010 한국도시환경학회지 Vol.10 No.2

본 연구에서는 낙동강 유역을 대상으로 원단위에 의해 계산된 배출부하량을 이용하여 비점오염원의 공간적인 분포를 분석하였다. 낙동강유역에서의 비점오염부하량은 점오염부하량에 비해 높은 것으로 나타났으며, 하류로 갈수록 비점오염부하량이 차지하는 비율이 높은 것으로 나타났다. 낙동강 유역의 주요한 비점오염원은 토지계인 것으로 나타났으며 다음이 축산계인 것으로 나타났다. 토지계에서의 주요한 비점오염원은 BOD는 대지, T-N은 산림과 농경지인 것으로 나타났으며, T-P는 대지, 산림, 농경지가 비슷한 비율을 나타내었다. 전반적으로 논을 제외한 농경지와 산림은 하류로 갈수록 감소하는 것으로 나타났으며, 논과 대지는 하류로 갈수록 증가하는 경향을 나타내었다.

L-THIA를 이용한 서울특별시 유출량 공간적 분석: 2011년 7월 27일 강우를 중심으로

전지홍,Jeon, Ji-Hong 한국농공학회 2011 한국농공학회논문집 Vol.53 No.6

Temporal and spatical surface runoff by heavy rainfall during 25~28 July, 2011 causing urban flooding at Seoul were analyzed using Long-Term Hydrologic Impact Assessment (L-THIA). L-THIA was calibrated for 1988~1997 and validated for 1998~2007 using monthly observed data at Hangangseoul watershed which covers 90 % of Seoul city. As a results of calibration and validation of L-THIA at Hangangseoul watershed, Nash-Sutcliffe coefficients were 0.99 for calibration and 0.99 for validation. The simulated values were good agreement with observed data and both calibrated and validated levels were "very good" based on calibration criteria. The calibrated curve number (CN) values of residential and other urban area represented 87 % and 93 % of impervious area, respectively, which were maximum percentage of impervious area. As a result of L-THIA application at Seoul city during 25~28 July, 2011, most of rainfall (54 %, 287.49 mm) and surface runoff (65 %, 247.32) were generated at 27 July, 2011 and a significant amount of rainfall and surface runoff were occurred at southeastern Seoul city. As a result of bi-hourly spatial and temporal analysis during 27 July, 2011, surface runoff during 2:00~4:00 and 8:00~10:00 were much higher than those during other times and surface runoff located at Seocho-gu during 6:00~8:00 represented maximum value with maximum rainfall intensity which caused landslide from Umyun mountain.

산림유역 비점오염 유달특성 분석

전지홍,최동혁,김태동 한국도시환경학회 2010 한국도시환경학회지 Vol.10 No.2

수질오염총량제에 있어서 유달율 계산은 매우 중요한 과정이다. 본 연구에서는 산림지역인 길안유역에 있어서 강우시유출량 및 BOD, T-N, T-P에 대하여 HSPF모델을 보정한 후 유출유황곡선과 오염유황곡선, 유달율유황곡선을 작성 하고 유출특성을 고찰하였다. 그 결과, HSPF는 유출량 및 영양물질 부하량을 잘 모의하였으며, 저유량에서는 T-N의 유달율은 BOD, T-P에 비해 상대적으로 높았으나 고유량에서는 BOD, T-P의 유달율은 T-N의 유달율 보다 높게 나타났다. 이는 대부분의 질소는 자연상태에서 용존성의 NOX로 존재하기 평상시 유출이 상대적으로 많이 일어나기 때문이며, 인이나 BOD의 경우에는 강우시 입자상의 유출이 많이 일어나기 때문인 것으로 판단된다. 부하유황곡선 분석결과, 길안유역의 고유량 일때의 TP가 수질오염총량제 목표수질을 초과하는 것으로 나타나 대상유역의 우선관리는 강우시 T-P인 것으로 나타났다.

반응표면 분석법을 이용한 천연마섬유보강 순환굵은골재 콘크리트의 성능 평가

전지홍,김황희,김춘수,유성열,박찬기,Jeon, Ji Hong,Kim, Hwang Hee,Kim, Chun Soo,Yoo, Sung Yeol,Park, Chan Gi 한국농공학회 2014 한국농공학회논문집 Vol.56 No.4

In this study, evaluated ware the strength and durability of the vegetated water purification channel concrete to which recycled aggregates, hawang-toh and jute were applied. Box-Behnken method of response surface analysis in statistics was applied to the experimental design. Experimental variables are as follows, recycled coarse aggregates, hawang-toh, blast-furnace slag and jute fiber. In the experiment, conducted were the tests of compressive strength, chloride ion penetration, abrasion resistance and impact resistance the replacement rate effects of the recycled aggregates, blast-furnace slag and hwang-toh on the performance of vegetated water purification channel concrete were analyzed by using the response surface analysis method on the basis of the experimental results. In addition, an optimum mixing ratio of vegetated water purification channel concrete was determined by using the experimental results. The optimum mixing ratio was determined to be in 10.0% recycled coarse aggregates, 60.0% blast-furnace slag, 10.1% hwang-toh and 0.16% jute fiber. The compressive strength, chloride ion penetration, abrasion rate, and impact number of fracture test results of the optimum mixing ratio were 24.1 MPa, 999 coulombs, 10.30 g/mm3, and 20 number, respectively.

HSPF를 이용한 임하호 유역 유사량 모의

전지홍,Jeon, Ji-Hong 한국농공학회 2010 한국농공학회논문집 Vol.52 No.6

Sediment yields from Imha watershed were simulated during 1993-2008 using Hydrologic Simulation Program-Fortran (HSPF). Using observed daily stream flow for 2004-2008 and hourly suspended solid concentration for three events during 2006, HSPF was calibrated and validated at the sites of Imha and Youngyang for stream flow and Dongchun and Jangpachun for sediment yield. The calibration and validation results represented high model efficiency for simulating daily stream flow and hourly suspended solid. The determination coefficients of calibration and validation were 0.90 and 0.81 for daily stream flow, and 0.91 and 0.86 for monthly stream flow, respectively. Based on model tolerances for calibration and validation of stream flow, HSPF performance for simulating stream flow represented 'very good'. The determination coefficients of calibration and validation were 0.94-0.96 and 0.95 for hourly sediment yields, respectively. The average yearly sediment yield during 1993-2008 was 122,290 ton/year and most of sediment yield (77 % of total yield) were generated from June to August. The calibrated HSPF simulated well the movement of water and eroded soil within Imha watershed.

BASINS에 의한 새만금 유역에서의 오염 부하량 산정

전지홍,윤춘경 建國大學校附設農業資源開發硏究所 2001 農資源開發論集 Vol.23 No.-

Watershed management is the crucial component in water quality control of streams and impoundments, and point and nonpoint sources are both important. However, less efforts have been made to nonpoint source control and resultant water quality degradation raised serious questions on the water quality management policy with point source put first. Recently, the government started legal enforcement for the Total Load Control System (TLCS) process for the four major river basins. For efficient and systematic application of TLCS, we need to establish a integrated watershed management system including both point and nonpoint sources which can assess massive database easily. The BASINS applicability study to the Saemangeum watershed in the southwest coast of the Korean peninsula. As a result of applying BASINS, Mangyeong subwatershed is more polluted than Donjin subwatershed, and cannot meet the water quality standard. Iksan creek site is most polluted in Mangyeong subwatershed. With the watershed model(SWAT), average dicharge volume is about 8.99×10^8m^3 and, TN and TP loading are 4,420 and 531ton/yr, respectively from Mangyeong subwatershed. As a results, BASINS can assess massive database quickly and run various models convently according to a user's purpose. So we recommend to use BASINS application of TLCS.

산림유역 비점오염 유달특성 분석

전지홍,최동혁,김태동 한국도시환경학회 2010 한국도시환경학회지 Vol.10 No.3

Calculating delivery ratio is very important procedure to apply Korean Total Maximum Daily Load (TMDL). Characteristics of delivered pollutant load were analyzed by plotting flow duration curve, load duration curve, and delivery ratio duration curve for BOD, T-N and T-P using HSPF simulation results. As a result of HSPF calibration, HSPF could simulate well both pollutant load and stream flow with high model efficiency. At high flow condition, the delivery ratio of BOD and T-P was higher than that of T-N. However flow condition from medium to low, the delivery ratio of T-N was higher than those of BOD and T-P because nitrogen can be easily delivered from site of source to stream as soluble form such as NOx whereas, phosphorus can easily adhere to soil and is discharged with soil when rainy season. Overall,delivery ratios were very low especially at condition from medium to low and we concluded that that's traditional trend of forested watershed. As a result of plotting load duration curve based on target water quality and monitoring data, all of T-P concentration at high flow condition (< 10% days exceeded) were not meet target water quality so, primary measure to improve water quality, if needed, at Giran watershed is to reduce nonpoint source pollution of T-P at high flow condition. 수질오염총량제에 있어서 유달율 계산은 매우 중요한 과정이다. 본 연구에서는 산림지역인 길안유역에 있어서 강우시유출량 및 BOD, T-N, T-P에 대하여 HSPF모델을 보정한 후 유출유황곡선과 오염유황곡선, 유달율유황곡선을 작성 하고유출특성을 고찰하였다. 그 결과, HSPF는 유출량 및 영양물질 부하량을 잘 모의하였으며, 저유량에서는 T-N의 유달율은BOD, T-P에 비해 상대적으로 높았으나 고유량에서는 BOD, T-P의 유달율은 T-N의 유달율 보다 높게 나타났다. 이는 대부분의 질소는 자연상태에서 용존성의 NOX로 존재하기 평상시 유출이 상대적으로 많이 일어나기 때문이며, 인이나 BOD 의 경우에는 강우시 입자상의 유출이 많이 일어나기 때문인 것으로 판단된다. 부하유황곡선 분석결과, 길안유역의 고유량일때의 TP가 수질오염총량제 목표수질을 초과하는 것으로 나타나 대상유역의 우선관리는 강우시 T-P인 것으로 나타났다.

미국과 중국의 경제정책 불확실성이 한국의 주택시장에 미치는 영향

전지홍,조영석 한국산업경제학회 2018 한국산업경제학회 정기학술발표대회 논문집 Vol.2018 No.12

원단위를 이용한 낙동강유역 비점오염 배출특성 분석

전지홍,장태권,황하선,최동혁,김태동 한국도시환경학회 2010 한국도시환경학회지 Vol.10 No.3

Spatial change of nonpoint source pollutant loadings along Nakdong River Basin was analyzed using discharged pollutant loading calculated by unit load. Nonpoint source pollutions were more loaded than point source pollution at Nakdong River Basin and increased steadily from upper to down river basin. Major source of nonpoint source pollution from Nakdong River Basin was land cover and second major source of that was livestock. Major source of land cover as nonpoint source pollution was urban for BOD item, forested and agricultural area for T-N and urban, agricultural,forested area with similar ratio for T-P item. Overall nonpoint source pollutions from upland and forest were decreased and thoes from paddy rice filed and urban area were increased as river goes from upstream to downstream. The pollutant loading rates from subwatershed located at downstream were higher than other subwatershed and major source of nonpoint source pollution were land cover and livestock. 본 연구에서는 낙동강 유역을 대상으로 원단위에 의해 계산된 배출부하량을 이용하여 비점오염원의 공간적인 분포를분석하였다. 낙동강유역에서의 비점오염부하량은 점오염부하량에 비해 높은 것으로 나타났으며, 하류로 갈수록 비점오염부하량이 차지하는 비율이 높은 것으로 나타났다. 낙동강 유역의 주요한 비점오염원은 토지계인 것으로 나타났으며 다음이 축산계인 것으로 나타났다. 토지계에서의 주요한 비점오염원은 BOD는 대지, T-N은 산림과 농경지인 것으로 나타났으며, T-P는 대지, 산림, 농경지가 비슷한 비율을 나타내었다. 전반적으로 논을 제외한 농경지와 산림은 하류로 갈수록감소하는 것으로 나타났으며, 논과 대지는 하류로 갈수록 증가하는 경향을 나타내었다.

논에서의 비점오염부하 예측을 위한 엑셀기반의 PADDIMOD2 개발

전지홍,Jeon, Ji-Hong 한국농공학회 2011 한국농공학회논문집 Vol.53 No.4

PADDIMOD2 was deloped to estimate nonpoint source pollution from paddy rice fields. The PADDIMOD2 was enhanced to estimate runoff and pollutant load during non-growing as well as growing season and to be easily used for public by development of Excel based system. Nutrient concentration and hydrology were based on Dirac delta function and continuous source function, and tank model for growing season and Event Mean Concentrations (EMCs) and SCS-Curve Number method for non-growing season. The PADDIMOD2 consists of three main component (input data, parameters data, and output data) by including eight Excel spread sheets. As a result of model application, total precipitation and irrigation were 1,051.7 mm and 439.2 mm, respectivley and surface runoff and water loss including infiltration and evapotranspiration were 463.0 mm and 947.9 mm, respectively. Annual nutrient loadings of T-N and T-P from study area were 6.7 kg/$km^2$/day and 0.5 kg/$km^2$/day, respectively. Development of PADDIMOD2 was focused on minimizing input data and maximizing user friendly system and is expected to be useful tool to evaluate various non-structure BMPs and estimate unit load from paddy rice fields for application at Korean TMDL.