SWMM 과 WASP5 모형을 사용한 하구담수호의 수질 예측

윤춘경,함종화 한국환경농학회 2000 한국환경농학회지 Vol.19 No.3

SWMM and WASP5 were applied for pollutant loading estimate from watershed and reservoir water quality simulation, respectively, to predict estuarine reservoir water quality. Application of natural systems to improve estuarine reservoir water quality was reviewed, and its effect was predicted by WASP5. Study area was the Hwa-Ong reservoir in Hwasung-Gun, Kyonggi-Do. Procedures for estimation of pollutant loading from watershed and simulation of corresponding reservoir water quality were reviewed. In this study, SWMM was proved to be an appropriate watershed model to the nonurban area, and it could evaluate land use effects and many hydrological characteristics of catchment. WASPS is a well known lake water quality model and its application to the estuarine reservoir was proved to be suitable. These models are both dynamic and .the output of SWMM can be linked to the WASP5 with little effort, therefore, use of these models for reservoir hater quality prediction in connection was appropriate. Further efforts to develop more logical and practical measures to predict reservoir water quality are necessary for proper management of estuarine reservoirs.

용수 재이용을 위한 소규모 오수처리시설의 UV 소독시설에 관한 연구

윤춘경,정광욱,함종화 建國大學校附設農業資源開發硏究所 2002 農資源開發論集 Vol.24 No.-

Deterministic and probabilistic approaches to the design of ultraviolet disinfection system for water reclamation are reviewed and discussed. The high inactivation of total coliform (TC), fecal coliform (FC) and Escherichia coli (E. coli) by UV disinfection was demonstrated, and the inactivations of TC, FC and E. coli were 97%, 98% and 99%, respectively. Within the range of 0.3∼0.4m Ws/cm, the effect of UV does on the inactivation ratio was not observed. However, in the highest wattage of UV lamp, 39W, the inactivation ratio of TC, FC and E. coli was 100%, regardless of the UV does so the UV density was more effective on inactivation ratio of TC, FC and E. coli rather than UV does. Under the 0.4 mWs/cm and 16W of UV lamp, the effect of dissolved organic matter and turbidity on the inactivations of TC, FC and E. coli could not be observed in this study within the range of 0∼32mg/L and 0-40 NTU, respectively. The effect of suspended solid is Tc, FC and E.coli observed liner equation y=305.03x-3697, y=186.14x-2509.5, y=152.96x-1976.5(r^=0.51, 0.69, 0.80) respectively. Suspended solid is the most important factor for design of the UV disinfection system.

습지-저류지에 의한 하구 담수호 수질개선 효과 예측

윤춘경 ( Yoon Chun Gyeong ),함종화 ( Ham Jong Hwa ) 한국농공학회 2000 韓國農工學會誌 : 전원과 자원 Vol.42 No.5

Investigated was the effectiveness of a constructed wetland system on water quality in Hwa-Ong estuarine reservoir, located in Hwasung-Gun, Kyunggi-Do. Procedures for estimation of pollutant loading from watershed and required area for natural systems, and simulation of corresponding reservoir water quality were reviewed. Generally, simulated reservoir water quality was within the reasonable range, and about 15% of total polder farmland was required to meet the agricultural water quality standards. The model was applied based on the current loading condition without additional treatment systems. Wetland system is an ecologically sound treatment system. Therefore, natural systems can be an alternative measure for water quality improvement in polder projects. The area for natural systems was estimated using literature value which might be acceptable at the planning stage. However, pilot system and its experimental data are requisite for large scale field application. WASP5 was proved to be a useful and versatile model, and its application to estuarine reservoir water quality simulation was thought to be appropriate.

SWMM 과 희귀분석법에 의한 유역의 오염부하량 산정 비교

윤춘경(Chun Gyeong Yoon),전지홍(Ji Hong Jeon),함종화(Jong Hwa Ham) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.2

Rating curve method and SWMM (Storm Water Management Model) were applied to estimate pollution loading from Hwa-Ong watershed in Kyunggi-Do. Sampling data from monitored sites were used to derive rating curves and calibrate SWMM, and they were applied to the whole watershed including non-monitored subcatchments. Overall, the results from these methods were comparable and the loadings were in the same range and the difference was acceptable considering complicated natural pollutant loading processes. However, inconsistency was observed among the subcatchments. The pollutant loading estimates from two subcatchments with similar area were almost identical in rating curve methods, while the difference was significant in SWMM methods. Rating curve method can be a reliable tool to estimate pollutant loading from watershed if it is fully monitored, but it may generate large error during extrapolation to non-monitored area. SWMM is a comprehensive hydrologic model with great diversity that it can incorporate watershed characteristics like land use effects which is not available in rating curve methods. Therefore, it is recommended to use reasonable watershed model rather than rating curve and unit loading methods for the estimation of pollutant loading from watershed

Feasibility Study of Constructed Wetland System for Sewage Treatment in Rural Area

( Jong Hwa Ham ),( Chun Gyeong Yoon ) 한국토양비료학회 2000 한국토양비료학회 학술발표회 Vol.2000 No.-

Feasibility Study of Constructed Wetland System for Sewage Treatment in Rural Area

Jong-Hwa Ham,Chun-Gyeong Yoon 한국토양비료학회 2000 한국토양비료학회 학술발표회 초록집 Vol.2000 No.5

Sewage Treatment Using Natural Systems and Effluent Reuse for Crop Irrigation in Small Communities

( Jong-hwa Ham ),( Chun-g. Yoon ),( Ji-hong Jeon ),( Ha-sun Hwang ) 한국농공학회 2003 韓國農工學會誌 : 전원과 자원 Vol.45 No.7

A pilot study was performed from July 1998 to December 2002, including winter performance, to examine seasonal performance of a constructed wetland and subsequent pond system for treatment of sewage in small communities of Korea. Pond was operated as a intermittent-discharge pond during winter period, and continuous flow system during growing season; its effects was evaluated from December 2001 to April 2003. The subsurface flow (SSF) wetland was satisfactory for treating sewage with good removal efficiency even during the winter period. The wetland effluent concentrations of BOD₅ and TSS were often higher in winter than in the growing season, but this was explained by the higher loading rates, rather than lower removal efficiency. The relatively poor-quality wetland effluent was further polished during winter in the pond. The upper layer of the pond water column became remarkably clear immediately after ice melt. In the growing season, ponds could be operated as a continuous flow system to remove nutrients and pathogens, and the effluent of pond could be reused as a supplemental irrigation water without risk of infection by sewage-borne pathogens as well as causing adverse effect on growth and yield. Overall, the wetland system was found to be adequate for treating sewage with stable removal efficiency, and the intermittent-discharge pond was found to be effective for further polishing if necessary. Therefore, the combination of a wetland and subsequent pond system and reuse of effluent as crop irrigation water is recommended as a practical alternative to treat sewage in Korean small communities, and partial discharge of pond water in March is suggested.

Sewage Treatment Using Natural Systems and Effluent Reuse for Crop Irrigation in Small Communities

Ham, Jong-Hwa,Yoon, Chun-G.,Jeon, Ji-Hong,Hwang, Ha-Sun The Korean Society of Agricultural Engineers 2003 韓國農工學會誌 : 전원과 자원 Vol.45 No.7

A pilot study was performed from July 1998 to December 2002, including winter performance, to examine seasonal performance of a constructed wetland and subsequent pond system for treatment of sewage in small communities of Korea. Pond was operated as a intermittent-discharge pond during winter period, and continuous flow system during growing season; its effects was evaluated from December 2001 to April 2003. The subsurface flow (SSF) wetland was satisfactory for treating sewage with good removal efficiency even during the winter period. The wetland effluent concentrations of $BOD_5$ and TSS were often higher in winter than in the growing season, but this was explained by the higher loading rates, rather than lower removal efficiency. The relatively poor-quality wetland effluent was further polished during winter in the pond. The upper layer of the pond water column became remarkably clear immediately after ice melt. In the growing season, ponds could be operated as a continuous flow system to remove nutrients and pathogens, and the effluent of pond could be reused as a supplemental irrigation water without risk of infection by sewage-borne pathogens as well as causing adverse effect on growth and yield. Overall, the wetland system was found to be adequate for treating sewage with stable removal efficiency, and the intermittent-discharge pond was found to be effective for further polishing if necessary. Therefore, the combination of a wetland and subsequent pond system and reuse of effluent as crop irrigation water is recommended as a practical alternative to treat sewage in Korean small communities, and partial discharge of pond water in March is suggested.

농업용저수지 수질모델 (ARSIM-rev)

함종화 ( Ham Jong-hwa ),김동환 ( Kim Dong-hwan ) 한국농공학회 2012 韓國農工學會誌 : 전원과 자원 Vol.54 No.1

농촌유역의 수질예측을 위한 BASINS의 적용 - HSPF모형을 중심으로 -

함종화 ( Ham Jong Hwa ),윤춘경 ( Yoon Chun Gyeong ) 한국농공학회 2001 한국농공학회 학술대회초록집 Vol.2001 No.-

For the water quality management of stream and lake, it is important to estimate and control nonpoint source loading to meet the water quality standard. So, integrated watershed management is required. BASINS is a multipurpose environmental analysis system for use by regional, state, and local agencies in performing watershed and water quality based studies. BASINS was developed by the USEP A to facilitate examination of environmental information, to support analysis of environmental systems and to provide a framework for examining management alternatives. BASINS contains HSPF which is one of the watershed runoff model. By using HSPF, nonpoint source loading from upper stream watershed was estimated. As a result, the simulated runoff was in a good agreement with the observed data and indicated reasonable applicability for whole watershed.