연구논문 : 남강중권역 오염부하 전망 및 삭감 시나리오별 하류 수질예측

유재정 ( Jae Jeong Yu ),신석호 ( Suk Ho Shin ),윤영삼 ( Young Sam Yoon ),강두기 ( Doo Kee Kang ) 한국환경영향평가학회 2012 환경영향평가 Vol.21 No.4

Namgang mid-watershed is located in downstream of Nakdong river basin, There are many pollution sources arround this area and it`s control is important to manage a water quality of Nakdong river, A target year of Namgang mid-watershed water environment management plan is 2013, To predict a water quality at downstream of Namgang, we have investigated and forecasted the pollutant source and it`s loading, There are some plan to construction the sewage treatment plants to improve the water quality of Nam river. Those are considered on predicting water quality. As results, it is shown that the population is 343,326 and sewerage supply rate is 79.2% and the livestock is 1,662,000 in Namgang mid-watershed, It is estimated that the population is 333,980, the sewerage supply rate is 86.9% in 2013, The milk cow and cattle were estimated upward and the pigs were downward by 2013. The generated loading of BOD and TP is 75,957 kg/day and 4,311 kg/day, discharged loading is 18,481 kg/day and 988 kg/day respectively in 2006, It were predicted upward the discharged loading of BOD and TP by 4.08% and 6.3% respectively. The results of water quality prediction of Namgang4 site were 2.5 mg/L of BOD and 0.120 mg/L of TP in 2013. It is over the target water quality at that site in 2015 about 25.0% and 9.1% respectively. Consequently, there need another counterplan to reduce the pollutants in that mid-watershed.

밀양강 중권역 오염부하 전망 및 삭감 시나리오별 하류 수질예측

유재정 ( Jae Jeong Yu ),윤영삼 ( Young Sam Yoon ),신석호 ( Suk Ho Shin ),권헌각 ( Hun Gak Kwon ),윤종수 ( Jong Su Yoon ),전영인 ( Young In Jeon ),강두기 ( Doo Kee Kang ),갈병석 ( Byung Seok Kal ) 한국환경과학회 2011 한국환경과학회지 Vol.20 No.5

Milyanggang mid-watershed is located in downstream of Nakdong river basin. The pollutants from that watershed have an direct effect on Nakdong river water quality and it`s control is important to manage a water quality of Nakdong river. A target year of Milyanggang mid-watershed water environment management plan is 2013. To predict a water quality at downstream of Milyang river, we have investigated and forecasted the pollutant source and it`s loading. There are some plan to construction the sewage treatment plants to improve the water quality of Milyang river. Those are considered on predicting water quality. As results, it is shown that the population of Milyanggang mid-watershed is 131,857 and sewerage supply rate is 62.2% and the livestock is 1,775.300 in 2006. It is estimated that the population is 123,921, the sewerage supply rate is 75.5% in 2013. The generated loading of BOD and TP is 40,735 kg/day and 2,872 kg/day in 2006 and discharged loading is 11,818 kg/day and 722 kg/day in 2006 respectively. Discharged loadings were forecasted upward 1.0% of BOD and downward 2.7% of TP by 2013. The results of water quality prediction of Milyanggang 3 site were 1.6 mg/L of BOD and 0.120 mg/L of TP in 2013. It is over the target water quality at that site in 2015 about 6.7% and 20.0% respectively. Consequently, there need another counterplan to reduce the pollutants in that mid-watershed by 2015.

남강 중권역의 효율적인 유역관리를 위한 중점관리 대상지류 선정

정강영 ( Kang Young Jung ),김경훈 ( Gyeong Hoon Kim ),이재운 ( Jae Woon Lee ),이인정 ( In Jung Lee ),윤종수 ( Jong Su Yoon ),이경락 ( Kyung Lak Lee ),임태효 ( Tae Hyo Im ) 한국물환경학회 2013 한국물환경학회지 Vol.29 No.4

The major 24 tributaries in Nam-River mid-watershed were monitored for discharge and water quality in order to understand the characteristics of the watershed and to select the tributary catchment for improving water quality. According to the analytical results of discharge and water quality monitoring data of 24 tributaries, the mean value of discharge below 0.1 m3/s was 62.5% among the monitored tributaries and it mostly exceeded the water quality standards of Nam-river mid-watershed (BOD5 = 3 mg/L, T-P = 0.1 mg/L over). According to the stream grouping method and the water quality delivery load density (kg/day/km2) based on the results of tributary discharge and water quality monitoring, the tributary watersheds for improving the water quality were selected. In the Nam-River mid-watershed, tributaries in the GaJwaCheon, HaChonCheon catchment (Group D, BOD5 = 3 mg/L over) and in the UirYeongCheon, SeokGyoCheon catchment (Group A, T-P = 0.1 mg/L over), which have a small flow (and/or large flow) and a high concentrations of water pollutants. The various water quality improving scheme for tributaries, in accordance with the reduction of potential point source pollution by living sewage and livestock wastewater, should be established and implemented.

중권역 대표지점의 목표수질 달성도 평가 - TOC를 중심으로 -

이재호,이승현,이수형,이재관,Lee, Jaeho,Lee, Seunghyun,Lee, Soohyung,Lee, Jaekwan 한국물환경학회 2017 한국물환경학회지 Vol.33 No.5

The attainment ratios of the water quality goals of the 114 mid-watershed representative stations, examined during the period2011 to 2015, were evaluated in the study. Of the four major river basins, the attainment ratio on water quality goal of the Geum River basin turned out to be the lowest. As a result of formal evaluation of the attainment ratios of BOD, COD and TOC, it was found that the attainment ratio of COD was much lower than that of BOD and TOC (I a circumstance thought to be caused by the higher COD/BOD and COD/TOC ratios of the water quality of the river than those of the environmental water quality standard). As well, higher COD/BOD and COD/TOC of wastewater discharged from point and non-point sources (other than those of the environmental water quality standards) might possibly represent one of the reasons. We also compared attainment ratio between the main stream and tributaries, which indicated that the higher attainment ratio was present in the main stream. The attainment ratio is also documented as more significant in the winter season than the summer season, possibly due to the contribution of non-point pollutants swept in by rain during the summer season during documented periods of high precipitation. Thus, water quality management in summer season and improvement of water quality of the tributaries might be important as a means of increasing attainment ratio on water quality goal.

홍수피해 감소를 위한 지역규모 기상모델의 적용성 분석

정용,백종진,최민하 대한토목학회 2012 대한토목학회논문집 B Vol.32 No.5B

기후변화로 증가하는 홍수피해를 대처하기 위해 여러 예측 방법들이 개발괴고 있다. 홍수예측의 가장 핵심 요소는 홍수예측을 위한 수문모델의 입력자료로 사용하는 강우에 대한 정확하고 신속한 예측이다. 기존의 레이더 강우를 이용한 Nowcasting 보다 더 많은 대응시간을 확보할 수 있는 중소규모의 기후모델인 WRF(Weather Research Forecast)-ARW(Advanced Research WRF)를 소개하고, 이를 한반도 중부지방의 청미천 지역에 적용하려 한다. WRF-ARW의 적용기간은 2006년 7월11일부터 7월23일까지이며 이 결과를 청미천 유역에 있는 강우 관측소들(생극, 삼죽, 설성)의 실제 강우관측소의 관측 값과의 비교에 의해 이 강우 사상에 대해 Thomson scheme(미세물리)와 Kain-Frisch scheme(적운형 매개변수)의 조합이 청미천 유역에서 가장 적합한 기후물리 조합이며 Mean Absolute Relative Error를 통해 세 개의 강우관측지점이 0.45 이상의 값을 나태내었다. The reduce the flood risk caused by unexpected heavy rainfall, many prediction methods for flood have developed. A major constituent of flood prediction is an accurate rainfall estimation which is an input of hydrologic models. In this study, a regional-scale weather model which can provide relatively longer lead time for flood mitigation compared to the Nowcasting based on radar system will be introduced and applied to the Chongmi river basin located in central part of South Korea. The duration of application of a regional weather model is from July 11 to July 23 in 2006. The estimated rainfall amounts were compared with observations from rain gauges (Sangkeuk, Samjook, and Sulsung). For this rainfall event at Chongmi river basin, Thomson and Kain-Froscj Schemes for microphysics and cumulus parameterization, respectively, were selected as optimal physical conditions to present rainfall fall amount in terms of Mean Absolute Relative Errors (MARE>0.45).