• 한국물환경학회지
• /
• 제29권4호
• /
• pp.514-522
• /
• 2013

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 $0.1m^3/s$ was 62.5% among the monitored tributaries and it mostly exceeded the water quality standards of Nam-river mid-watershed ($BOD_5$ = 3 mg/L, T-P = 0.1 mg/L over). According to the stream grouping method and the water quality delivery load density ($kg/day/km^2$) 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, $BOD_5$ = 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.

• 한국지하수토양환경학회:학술대회논문집
• /
• 한국지하수토양환경학회 2003년도 총회 및 춘계학술발표회
• /
• pp.94-96
• /
• 2003

Since 1995, MOCT(Ministry of Construction and Transportation) and KOWACO(Korea Water Resources Corporation) have established the National Groundwater Monitoring Network in South Korea and also MOE(Ministry of Environment) has operated Groundwater Quality Monitoring network. Until 2001, 202 monitoring stations by MOCT and 780 monitoring wells by MOE have been constructed, measured groundwater level and analyzed water samples. Groundwater quality analysis has been conducted two times a year during last 6 years for all monitoring wells. The quality data has about 15 components including pH, COD, Count of Coliform group, and etc.. Trend analysis has been peformed for 6 components(Coliform, pH, COD, NO$_3$-N, Cl and EC) of water quality which are analyzed more than 7 times for total monitoring wells. Two test methods have been used ; Sen's test and Mann-Kendall test. These trend tests have been done at the 0.05 significance level. By the result of Sen's test, Count of Coliform group has either upward or downward trends at 4.3 percent of the monitoring points. pH does at 5.6 percent, COD does at 8.6 percent, Nitrate-Nitrogen does at 13.2 percent, Chloride does at 13.4 percent, and. EC does at 11.6 percent of the monitoring points. The exact causes of the groundwater quality trends are difficult to specify. Notable downward trends in nitrate at many monitoring points may be the result of reduction on some contamination sources. Potential causes include diminished agricultural areas, improvements in sewage treatment and a decrease in atmospheric deposition. Increase in chloride at many monitoring points may be the result of increased non-point source pollution such as road salting and runoff from sprawling paved developments and suburbs.

• 융합신호처리학회논문지
• /
• 제10권3호
• /
• pp.207-213
• /
• 2009

정수장에서 수도꼭지까지 전체적인 물 공급 체계에서 수돗물의 수질은 먹는 물 기준에 적합해야 하지만 수돗물 공급과정에서 수질 모니터링과 충분한 관리가 이루어지지 않고 있다. 특히 대부분의 소규모 저수조(지하저수조 또는 고가(高架)저수조)의 수도관은 다양한 오염원에 노출되어 있다. 최근의 수질 모니터링 시스템은 몇몇 대형 정수장과 배수지 등에 설치되어 운영하고 있다. 특히 인터넷을 이용한 수질 모니터링은 언제 어디서나 주민들이 확인할 수 있도록 몇몇 지방자치단체에서 채택하고 있다. 이러한 시스템을 구축하는 것은 대규모 시설을 필요로 하기 때문에, 아파트, 공공건물, 소규모 지하저수조 또는 고가저수조와 같은 규모가 적은 물 공급시설에는 제한적으로 적용된다. 본 연구에서는 저렴한 각각의 수질센서 모듈을 집적화하여 개발한 다항목 수질계측기를 이용하여 인터넷에서 운용되는 온라인 모니터링 프로그램을 개발하였다. 저수조 관리자는 온라인으로 먹는 물의 수질 측정값을 모니터링할 수 있다. 제안된 다항목 수질측정기를 집적화하였으며, 저수조의 크기와 관계없이 저가로 다양한 저수조에 쉽게 적용할 수 있는 시스템이다.

• 한국방재학회 논문집
• /
• 제4권1호
• /
• pp.51-56
• /
• 2004

본 연구는 전형적인 도심소재 중 소하천인 오산천 상류를 중심으로 수질변화 현상을 정확히 파악하기 위하여 24시간에 걸친 연속측정을 통해 수질의 변화를 조사하였고, 이러한 결과를 통하여 효율적인 하천관리 방향을 제시하였다. 오산천 수질의 연속조사의 결과로부터, 본류의 수질개선을 위해서는 다음과 같은 일들이 선행되어야 할 것으로 판단된다. 첫째, 본류 수질개선을 위해서는 유입지류의 효율적인 관리방안이 필요하다. 둘째, 하천 본류의 저질로부터 재용출 되는 오염을 방지하기 위한 대처방안이 필요하다. 본 연구에서는 수질저하를 방지하기 위해 단순한 조사만으로도 중 소하천의 효과적인 관리 방안을 제시했다. 따라서 하천에서의 연속적인 수질 모니터링은 하천수질 개선을 위해 중요하며, 나아가 하천환경에서 일어나는 물질순환 및 물질수지는 건전한 하천조성을 위하여 정확히 평가되어야 한다.

• 한국물환경학회지
• /
• 제26권1호
• /
• pp.125-132
• /
• 2010

Characterization of sediment quality is important for the proper management of surface water quality, yet sediment has not been monitored sufficiently. In this study, fecal indicator microorganism concentrations of sediments in the Geum River Basin were monitored. Sampling was carried out at one paddy field, one lakeshore and five monitoring stations in the lower reach of the Geum River Basin. Surface waters and sediments were sampled four times during rainy season. Total coliform concentrations of sediments were 12 times higher in average to those of surface waters while E. coli concentrations of sediments were six times higher. No correlation found between indicator microorganism concentration between surface waters and sediments.

• 환경위생공학
• /
• 제5권2호
• /
• pp.15-21
• /
• 1990

Current analyses of tap water in Seoul metropolitan area prove the water is still safe, despite the Pollution of raw water source. However, it also significantly suggests that a feasibility study of apply, additional advanced technology to existing water treatment processes is needed in order to cope with future pollution. Also, the monitoring of water quality within private, multi-household buildings is important as the monitoring of public water distribution system.

• 대한환경공학회지
• /
• 제33권8호
• /
• pp.617-622
• /
• 2011

수질오염총량관리제는 유역에 설정된 목표수질을 달성하기 위해 허용부하량 이내로 오염물질의 배출량을 관리하기 위해 도입되었다. 그 동안 수질오염총량관리제를 시행해오면서 수많은 시행착오와 문제점들이 발생하여 이를 개선하기 위한 제도적, 기술적 보완이 이루어져 왔으나, 제도의 효율적인 시행을 위해 근본적인 개선이 필요한 실정이다. 따라서 본 연구에서는 수질오염총량관리제의 합리적 시행을 위한 개선방안을 새로운 시각에서 제시하고자 한다. 수질오염총량관리제의 시행에 있어 무엇보다도 먼저 지류하천의 수질 유량모니터링을 위한 대상하천의 규모, 측정시기, 항목 및 주기 등을 포함하는 시스템 구축을 통하여 모니터링을 수행하여야 한다. 모니터링 결과를 바탕으로 해당유역의 이수 및 생태목적에 맞도록 대상물질 및 목표수질을 설정하고, 전체유역을 대상으로 기본계획을 수립하여야 한다. 목표수질을 초과하는 유역만을 대상으로 수질 개선을 위한 시행계획을 수립하고, 시행계획에 따른 해당유역의 목표수질 만족여부를 주요내용으로 하는 이행평가를 매년 수행해야 한다. 최종적으로 해당유역에 설정된 목표수질을 만족하지 못하거나, 대상항목 또는 목표수질이 변경되면 동일한 순으로 절차를 반복하게 되고, 해당유역에 설정된 목표수질을 만족하면 해당유역의 수질오염총량관리제를 종료하면 된다.

• 한국농공학회논문집
• /
• 제48권1호
• /
• pp.91-102
• /
• 2006

Most projects of tideland reclamation with dike construction produce estuarine reservoirs, which may result in water quality problems due to blocking of natural flow of stream water to the sea. External loadings to the reservoirs through tributaries are major concerns in a concerned water quality management. The water quality of a reservoir is greatly influenced by watershed drainage, and accurate estimation of pollutant is indispensable for in the reservoir management. Concentrations of the microorganisms in stream water and conventional parameters were monitored in the 13 water quality monitoring sites located in a rural watershed of Hwaong estuarine reservoir. The indicator of microorganisms showed strong correlation between them, and regression equations with $R^2\geq0.70$ may be used fur estimating one from other microorganisms. The relationships between water quality parameters obtained in this study may be used to infer one unknown pollutant concentrations from the measured pollutant loadings. This methodology could be applied to other areas where the watershed characteristics are not significantly different from the study area. High concentrations of nitrogen was observed in water quality monitoring sites affected by urban land uses and numbers of livestock in wet day as well as dry day, due to the influent of diffuse sources.

• The Korean Journal of Ecology
• /
• 제21권6호
• /
• pp.759-770
• /
• 1998

biotic indices scoring with the benthic macroinvertebrates were assessed as pollution monitoring tools in the north branch of the Han River system, Korea. We investigated the temporal variability of water quality at unpolluted, moderately polluted and heavily polluted sites using several biotic indices and assessed appropriate biological monitoring indices for lotic systems in Korea. The following biotic and chemical indices were employed in order to compare their applicability to the lotic systems : Trent Biotic Index (TBI), Chandler's Biotic Index-Average Score per Taxon (CBI-ASPT), Modified Biological Monitoring Working Party Score System-Average Score per Taxon (BMWP-ASPT), Hilsenhoff's biotic Index (BI) and Family-level Biotic Index (FBI) models for biotic analyses and National Sanitation foundation's Water Quality Index (NSFWQI) and comprehensive Chemical Pollution Index (Pb/n) for chemical analyses of water quality. Index and score values were compared with each other and with 24 water chemistry parameters. All biotic indices were significantly auto-correlated (p<0.001) and BI and FBI/ROK among them were highly correlated (r=0.84). BI and BMWP-ASPT models were also highly correlated with NSFWQI, while TBI values showed high correlation with the Pb/n. The BI and BMWP-ASPT were highly correlated with the most water chemistry parameters. We conclude that the BI model, which includes indicator species and abundance of taxa, is best suited for the bioassessment of lotic systems in Korea. For rapid field-based assessments, FBI/ROK and BMWP-ASPT models are also appropriate.

• 한국습지학회지
• /
• 제1권1호
• /
• pp.17-28
• /
• 1999

The purpose of this study was to analysis water quality monitoring data and to estimate future trends using ARIMA model of time series analysis. Water quality data in Chin yang reservoir were used with monthly monitoring interval during past 7 years. The variations of water quality parameters with periodicity and trend could be estimated by multiplicative ARIMA models and the statistical tests showed a good agreement with the observed data. Therefore, the monthly values of water quality parameters could be forecasted using these models.