우리나라 비점원 수질오염 관리의 문제점과 개선방안

권순국(Soon Kuk Kwun) 大韓環境工學會 1998 대한환경공학회지 Vol.20 No.11

축소단면흐름 형상항력계수

권순국 ( Kwun Soon Kuk ),유동훈 ( Yoo Dong Hoon ) 한국농공학회 1995 韓國農工學會誌 : 전원과 자원 Vol.37 No.3

The efforts of formulation have been reviewed and the results of existing laboratory experiments are investigated in order to describe the contracted flow which occurs at the final closure of sea dike construction. The regional characteristics of contracted flow is analyzed by checking the drawdown curve, and Chezy's mean velocity equation is employed to estimate the discharge rate at the closure. Weir-type discharge equations are reviewed, which are derived from Bernoulli equation, and the problems of the equations are discussed. Chezy's mean velocity equation is considered to be widely and generally applicable, and the empirical factor introduced in Chezy's equation is named 'form drag factor' since it is primarily dependent on the form drag caused by the contraction of discharge area. Laboratory experiments were conducted mainly in order to investigate the variation of form drag factor against various parameters, and an empirical equation is developed for the estimation of form drag factor.

전전환답(田轉換畓) 포장(圃場)에서의 지하수위(地下水位) 및 토양수분(土壤水分) 변화(變化) 특성(特性)

권순국 ( Kwun Soon Kuk ),윤경섭 ( Yoon Kyung Sup ) 한국농공학회 1994 韓國農工學會誌 : 전원과 자원 Vol.36 No.2

Experimental studies were conducted to make clear the soil moisture environment under the condition of paddy-upland rotational fields by investigating water-table depths and soil moisture contents during growing season of crops in two kinds of soil. The following results were obtained. 1. Although water-table depths fluctuated with the amount of rainfall in the experimental field, it seemed that the variation of vater4able depths in the paddy-upland rotational, field was strongly affected by the condition of locations on paddy fields. 2. It is recognized that the concept of sum of excess water depth(SEW_xx) and sum of excess water day(SED_xx) can be used to represent the soil moisture stress index due to the fluctuation of water-table depths. 3. The results of this study clearly indicate that drainage in paddy-upland rotational field to maintain an optimum soil moisture content must be made by introducing the concept of block drainage which needs both subsurface drainage and intercept drainage around a field. 4. Soil moisture contents were affected by both the amount of rainfall and water-table depths, however, the moisture content for top soil showed higher correlation with the amount of rainfall while that for subsoil with water-table depths.

담수호의 수질예측 및 부영양화 방지에 관한 연구

권순국,유명진,방기웅,고덕구,Kwun, Soon Kuk,Yu, Myong Jin,Bang, Ki Woong,Koh, Deuk Koo 대한토목학회 1990 대한토목학회논문집 Vol.10 No.4

본 연구의 목적은 담수호에 적합한 Multiple Box모형을 개발, 적용하여 장기 수질예측을 할 수 있도록 하므로써 담수호에서의 수질관리 방안을 제시하는데 있다. 모형은 수문 부모형과 수질 부모형으로 구성되어 있으며, 수질 부모형에서 고려한 수질항목은 수온, Chlorophyll-a, BOD, DO, N과 P 등이었다. 본 모형의 적용은 아산호를 대상으로 시행하였으며, 호의 수문환경조건을 고려하여 호를 상층은 2개의 Box, 하층은 1개의 Box 등 총 3개의 box로 분할하였다. 수질예측모형을 아산호에 적용한 결과 대체로 장기적 수질변화추세를 잘 나타내고 있는 것으로 평가되었다. 개발된 수질모형의 미래의 오염부하량을 입력하여 수질개선 방안들을 비교한 결과, Chlorophyll-a의 경우 무린세제의 도입이, BOD와 T-N의 경우 고도하수처리시, T-P의 경우 축산폐수의 저감시 각각 효과가 큰 것으로 평가되었다. The purpose of this study was development and application of a multiple box model for long term prediction and control of water quality in estuary reservoir. The model was composed of one main model and two sub models for hydrology and water quality. Water quality constituents for modeling were temperature, chlorophyll-a, BOD, DO, N, and P. The model had been applied to Asan reservoir, and the reservoir had been devided into three boxes-two boxes for a upper layer and one box for a lower layer-to represent stratification. The model appeared satisfactory in representing long term trend of water quality variations by comparing measured and simulated results. According to the application of the model to study alternatives for water quality improvement to deal with increase in future pollution load, use of non-phosphorous detergent for chlorophyll-a, advanced sewage treatment for BOD and T-N, reduction of livestock waste for T-P were evaluated as more effective ones than any others, respectively.

지구온난화가 환경과 농림업에 미치는 영향

권순국,Kwun Soon- kuk 한국관개배수위원회 1994 한국관개배수논문집 Vol.1 No.1

한국(韓國)의 논관개시설(灌漑施設) 유지관리(維持管理) 및 물관리(管理)

권순국 ( Kwun Soon Kuk ) 한국농공학회 1989 韓國農工學會誌 : 전원과 자원 Vol.31 No.2

지난 40년간 韓國에서는 농업生産 특히 쌀 생산의 가속화를 위한 노력으로서 灌漑事業에 큰 비중을 두어 왔다. 따라서 灌漑施設과 農地改良에 대한 投資는 괄목할 만큼 伸張되어 1960년 대 이래 총투자액은 美貨 61억달러에 달하고 있다. 그 결과 灌漑에 대한 잠재력과 灌漑面積은 크게 확장되어 지난 40여년간 純灌漑面積은 1945년의 188.200ha로부터 1988년의 195.750ha로 증가 되었으며 이 숫자는 한국 총 畓面積의 73%에 이르는 면적이다. 韓國에는 농업수자원의 開發과 管理를 計劃, 실시하는 임무가 부여된 國家機關이 있다. 그러나 이에 관련되는 국가수준의 機關이 하나이상이므로 관련되는 機關間의 統合이 문제로 제기되고 있다. 이러한 문제는 얼마간 인식되고 있기는 하지만 아직도 심각하게 남아 있다. 農地改良組合 農村近代化促進法에 의하여 조직되고 운영되고 있다. 각 組合에서는 灌漑管理에 대한 政策, 灌漑水 分配計劃 水資源管理 등을 담당하는 管理課가 있으며 또한 각 조합내에는 未瑞水路 및 團場의 물管理를 위한 農民灌漑團體인 흥농계가 조직되고 있다. 農家水準에서의 灌漑開發 및 관리에 關聯되는 問題點 및 주요爭點은 다음과 같음을 확인할 수 있었다. 1. 灌漑組織 및 물 사용의 低效率 2. 몽리구역내의 不均衡한 물分配 3. 水稅의 부과 합리화 및 징수방법 4. 現在의 낡은 灌漑組織 5. 灌漑施設을 效率的으로 운영, 유지관리 하기위한 훈련된 人力 6. 관련 機關間의 統合 韓國의 現 經濟成長 단계에 비추어 볼 때 물의 수요와 水資源의 汚染이 증대되고 있으며 새로운 水資源 開發은 점점 어려워지고 또 高價이다. 따라서 더 이상의 발전을 위해서는 토지와 수자원의 효율적이고 경제적인 이용은 물론 現在 灌漑組織의 개선과 집중적인 管理가 강조 되어야할 것으로 생각된다.

수질관리 모형에 의한 농촌 소하천의 수질예측

권순국,장정열,Kwun Soon-kuk,Jang Jeong-ryeol 한국관개배수위원회 1994 한국관개배수논문집 Vol.1 No.1

In this study, the Water Quality Management Model for Rural Areas(WQMMRA) has been developed by combining the Model for Pollutant Load Computation(MPLC) and the existing QUAL2E model. The WQMMRA model was applied to evaluate its applicability for the repr

Multiple Box 수질모형(水質模型)에 의한 해남호(海南湖) 수질예측(水質豫測)(II) -개발모형(開發模型)에 의한 미래수질예측(未來水質豫測)-

권순국 ( Kwun Soon Kuk ),신경수 ( Shin Kyung Soo ) 한국농공학회 1991 韓國農工學會誌 : 전원과 자원 Vol.33 No.1

The purpose of this study was the application of a multiple box model for the long term prediction, thus to evaluate different control alternatives of water quality in the Haenam Estuary Reservoir. The result of the study could be summarized as follows ; 1. As input data for the prediction of future water quality, the climatic data in 1980 were used. Also hydrologic data in 1980 as a base year for analysis were simulated with the aid of USDAHL-74/SNUA watershed model. The data for water quality collected in the wateshed, streams and the reservoir were used for determining total inflow pollutant loadings from the source of pollution. The parameter values determined through calibration and verification test of the model were used without any change. 2. The grade of predicted water quality of the Haenam Estuary Reservoir in the future year of 2001 from the base year of 1987 was ranked as Grade I in case of assuming zero pollutant load. Consequently it can be concluded that some alternatives to reduce pollutant load would be needed to improve water quality of the reservoir. 3. The effects of advanced sewage treatment, livestock waste treatment and the drainage of reservoir water through siphon for the improvement of water quality in the reservoir were compared from the simulation result of the model developed. The result showed that the reduction of livestock waste was evaluated as more effective one than any other measures. 4. The grade of water quality in the year of 2001, when applying all treatment at the same time was ranked as Grade III suitable for the domestic use by improving from the Grade IV in 1987, the base year Therefore, it was suggested that combined management of different pollutant sources should be needed to improve or maintain water quality of the Haenam Estuary Reservoir.

GIS 및 격자망 자동발생 프로그램을 이용한 해수유동 유한요소 모형의 전처리 시스템

권순국,고덕구,Kwun Soon-kuk,Koh Duck-koo 한국관개배수위원회 1995 한국관개배수논문집 Vol.2 No.2

In spite of their high availability in the field of water resources, finite element models generally require large amount of input data in which the preparation of them consists of complicated procedures and time consuming works. In addition, in case of a

농업수자원으로서의 흡수성 Biofilter 처리수 재이용

권순국 ( Kwun Soon Kuk ),김현욱 ( Kim Hyun Uk ),권용웅 ( Kwon Yong Woong ),조영현 ( Cho Young Hyun ),박상원 ( Park Sang Won ),임경래 ( Lim Kyoung Lae ) 한국농공학회 2003 韓國農工學會誌 : 전원과 자원 Vol.45 No.5

Absorbent Biofilter Systems (ABS), composed of an anaerobic septic tank, a pump chamber and an absorbent biofilter tank, have been found to economically provide rural on-site wastewater treatment. This study was conducted to assess the potential of ABS effluent as an alternative water resource for agricultural and environmental use, with respect to the removal of pathogenic microorganism and their fertilization effect. A pilot scale ABS was used to compare its removal efficiency of pathogens from effluent water. Overall, more than 95 percent of Salmonella and E. coli were removed. This result demonstrates that a significant reduction in the pathogenic microorganism of effluents can occur in ABS, which implies the feasibility for the use of ABS effluent in agriculture and environment, with the provision of a further simple disinfection step, in order to satisfy the WHO guidelines for the microbiological quality in agriculture. In addition, because of the abundant nutritional content of ABS effluent, the substitution effect of fertilizer (N, P and K) in paddy irrigation, i.e. 2/3 for nitrogen, l/3 for phosphorus and 1/5 for potassium would be expected. Based on the experimental data, the ABS effluent could be used as a new alternative water resource for paddy irrigation, as well as for environmental purposes, such as supplying water to ecological parks in rural villages.