• 제목/요약/키워드: The nakdong river

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낙동강수계 수질오염총량관리를 위한 유량조사 평가 (Evaluation on Actual Discharge Data for TMDL in Nakdong River Basin)

  • 김경훈;김용석;박배경;윤종수;신찬기
    • 환경위생공학
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    • 제23권4호
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    • pp.65-71
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    • 2008
  • To drive efficiently total water pollution load management, needs to calculate the exact load emissions, pollution load allocation and implementation evaluation in each unit area of watershed and accurate and regular flow of data. For these reasons, the Nakdong River TMDL Research Center has produced directly or indirectly in the average interval of eight days (30 times or more / year) 41 points for unit area of the total water pollution load management and 8-point of municipal requirement for a total of 49 branches as a flow data in 2004 from August. This acquired the survey flow is evidence of trends and changes each point in the Nakdong River based on time, such as 10 years based on average design flow available to the foundation of the summit as the major water policy is to be utilized. This study was performed on actual discharge measuring data and introduced performance results each drainage basin of Nakdong River from 2004 to 2008 over the total of past five years.

낙동강수계 수질의 시·공간적 특성에 대한 통계학적 분석 (Statistical Analysis of the Spatio-temporal Water Quality Characteristics of the Nakdong River)

  • 서미진;조창대;임태효;김상훈;윤현정;김용석;김경훈
    • 한국환경과학회지
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    • 제28권3호
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    • pp.303-320
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    • 2019
  • Water quality is characterized by various complex factors. Therefore, a systematic understanding of water quality trends is required to carry out a proper evaluation. In this study, we analyzed the spatio-temporal water quality characteristics of the Nakdong River using five-year data from 2012 to 2016. Data was collected on the pH, DO, BOD, COD, SS, TN, TP, TOC, WT, EC, $NH_3-N$, $NO_3-N$, $PO_4-P$, Chl-a, rainfall, and total and fecal coliforms. A total of 38 water quality measurement stations, from Andong1 to Gupo, were considered. Statistical analyses including trend, cluster, and factor analyses were conducted to identify the dominant water quality components affecting the Nakdong River. The Nakdong River was spatially classified into three groups for up-stream (Andong1 to Sangju1), mid/up-stream (Donam to Dalseong), and mid/down-stream (Hwawonnaru to Gupo) data collection, and temporally into two groups for summer/fall (7~10), and the rest of the season (11~6) data. The water quality of the entire Nakdong River showed trends similar to the mid/down-stream section, which indicates the importance of water quality management in this section. Suspended solids, phosphorus, and coliform groups were established as important factors to be considered in the summer/fall season across the river, especially in the mid/down-stream section. Nitrogen and organic matter were identified as important factors to be considered in the rest of the season, especially in the mid/up-stream section. This study could help determine the water quality components that should be intensively monitored in the Nakdong River.

낙동강 조류군집의 계절적 변화와 영양염 농도와의 관계 (Relations of Nutrient Concentrations on the Seasonality of Algal Community in the Nakdong River, Korea)

  • 유재정;이경락;이혜진;황정화;류희성;신라영;박아름;천세억
    • 한국물환경학회지
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    • 제31권2호
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    • pp.110-119
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    • 2015
  • The construction of the eight large weirs in the Nakdong River, the second largest river in Korea, caused big changes in the physical environment of the water system. Algal communities and their correlations with environmental factors, mainly nutrients were studied at five weir areas in the Nakdong River from 2010 to 2013. Water quality, hydrodynamics and algal composition were investigated. Results showed that flow velocities were reduced compared with that before weir construction near the areas where are located in the mid and upstreams of the Nakdong River. A seasonal algal community succession was observed and it was mainly correlated with temperature and phosphorus. Diatoms were dominated from winter to spring months and massive diatomic blooms of Stephanodiscus sp. occurred early in March during survey period. Cyanobacterial blooms of Microcystis sp. occurred from July to September 2013 and was preceded by the lower total phosphorus concentration of $0.05mg\;L^{-1}$. The correlations between total phosphorus concentrations and algal abundances were not significant during the survey periods. However, significant correlation with cyanobacteria was found in the period of weir construction after only at the GG survey site and blooms periods of 7 times in the survey sites, and its correlation coefficients were 0.53 (p<0.001) and 0.42 (p<0.01) respectively. When algal bloom was observed, partially low nutrient concentration was observed in the Nakdong River. In conclusion, partially low nutrient concentration which may result from algal bloom was observed, and we presume it caused the reduction of algal abundunces.

4대강 사업과 금호강의 수질이 낙동강 본류에 미치는 영향에 대한 연구 - 강정고령보 공사현장을 중심으로 (The Effect of for Major River Project and Kumho River on Nakdong River's Water Quality - Focused on Kangjung-Koryung Weir)

  • 황삼진;배헌균;김학윤
    • 한국환경과학회지
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    • 제22권6호
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    • pp.695-703
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    • 2013
  • In this study, the effects of four major river project and Kumho River, second biggest branch of Nakdong River, were investigated to provide basic data for proper management of Nakdong River's water quality. Daily sampling processes at three different points, Munsanri (the upper side of Kangjung-Koryung weir), Kangchang (the outlet of the Kumho River) and Samunjin (the lower side of Kangjung-Koryung weir and junction of Kumho River and Nakdong River), were conducted from May 1st 2011 to Sep. 4th 2011. Water samples were analyzed for nine factors, DO, BOD, COD, T-N, T-P, pH, turbidity, SS, and coliform. As demonstrated by the results, concentrations of BOD, T-N, T-P and coliform at Nakdong River were affected by water quality of Kumho River while SS and turbidity were affected by constructions for Kangjung-Koryung weir. Further studies, for example, affects of wastewater treatment facilities, should be followed.

낙동강 강정고령보 상류 퇴적물 측정망 지점의 중금속 오염도 및 대표성 평가 (Evaluating Sediment Heavy Metal Pollution Level and Monitoring Network Representativeness at the Upstream Points of the Gangjeong-Goryeong Weir in the Nakdong River)

  • 안정민;임태효;김성민;이상수;김신;이권철;김용석;양득석
    • 한국환경과학회지
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    • 제27권7호
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    • pp.477-488
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    • 2018
  • In this study, heavy metal levels at the sediment monitoring network site upstream of the Gangjeong-Goryeong weir in the Nakdong River were surveyed from 2012 to 2016. We assessed the sediment pollution level using various pollution indexes based on ICP-MS analysis. The stream sediment pollution assessment standard, established through Regulation No. 687 of the National Institute of Environmental Research (2015), pollution load index (PLI), potential ecological risk index (RI), and mean PEL Quotient (mPELQ) were used to evaluate the sediment pollution level. We verified the representativeness of the monitoring point through the distribution of sedimentation and scour behavior by river bed surveying using anacousticDopplercurrentprofiler.

한강 및 낙동강 수계 주요 하천을 중심으로 어류를 이용한 수생태 건강성 평가 (Ecological Health Assessment using Fish for the Han River and Nakdong River in Korea)

  • 노성유;최희락;박종영;황순진;김상훈;이재안
    • 한국물환경학회지
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    • 제31권3호
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    • pp.319-327
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    • 2015
  • The present study was carried out to develop biological criteria for aquatic ecosystem health assessment using composition and diversity of collected species. The sampling sites were a total of 67 sites in the Han River (29 sites) and the Nakdong River (38 sites), May and September 2012. During the survey period fish were collected totally 93 species. In each water system, 73 and 61 species were collected in the Han River and the Nakdong River respectively. The current composition of fish species between the Han River and Nakdong River showed similar pattern. The dominant species was Zacco platypus of the Han River, and the Nakdong River was Opsariichthys uncirostris. In particular, ecological characteristics of O. uncirostris frequently appeared in general polluted waters. In conclusion, in the Nakdong River, average value of FAI (Fish Assessment Index) was averaged 41.3, indicating a "poor condition", and the Han River was 53.1, indicating a "poor condition". The aquatic health of the Nakdong River assessed based on FAI was considered to be worse than that of the Han River.

낙동강 백천 합류부 지점의 물환경측정망 대표성 검증 (Verification of Water Environment Network Representative at the Baekcheon Junction of the Nakdong River)

  • 안정민;임태효;김성민;김신;김경훈;권헌각;신동석;양득석
    • 한국환경과학회지
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    • 제27권6호
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    • pp.371-381
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    • 2018
  • Multifunctional weirs constructed through the Four Major Rivers Restoration Project are operated as management water levels. The purpose of this study was to evaluate the effect of water level in the main stem on the tributary water level according to multifunctional weir operation, because the operation of multifunctional weirs for water level management influences the drainage of tributaries. In this study, water level pressure gauges were installed and spatial and temporal water quality was observed. The LOcally Weighted Scatterplot Smoothing (LOWESS) technique was applied to the Nakdong River and the Baekcheon Junction, both upstream of the Gangjeong-Goryeong weir, in order to analyze water quality trends. When considering the overall analysis and observations, it was found that the water quality forecasting point located at the Baekcheon estuary point should be transferred to the Dosung Bridge, which is located upstream of the Sunwon Bridge.

토지피복별 비점부하량 기여율 해석을 위한 분포형 모델 개발 및 적용 (Development and Application of the Grid-Distributed Model for Contribution Rate Analysis on Non-point Source Pollution According to Landuse)

  • 안정민;정강영;김신;이혜진;신석호;양득석;신동석;나승민
    • 한국물환경학회지
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    • 제33권1호
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    • pp.78-89
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    • 2017
  • Water quality monitoring network data is being affected continuously due to non-point source pollution arising from agricultural land located on the Gwangsancheon outlet in the Nakdong River basin. In this study, we have performed analysis of water quality monitoring system, water quality pattern using SOM and water quality in the Gwangsancheon for sub-basin located at Gisan-myeon in the Nakdong River basin. We have developed and applied the model to estimate the runoff and non-point source loading. As a result of SOM pattern, the effect of non-point source pollution was the largest in the paddy fields and fields. As a result of the developed model, we found contribution rate and reduction rate for non-point source loading according to change of landuse because the reduction effect of nonpoint pollutants was 20.9% of SS, 9.9% of TN, 21.2% of TP and 8.9% of TOC depending on the landuse change.

주성분 분석법을 이용한 낙동강 하구 해역의 수질 평가 (Evaluation of Water Quality using Principal Component Analysis in the Nakdong Rivev Estuary)

  • 신성교;박청길;송교욱
    • 한국환경과학회지
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    • 제7권2호
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    • pp.171-176
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    • 1998
  • This study was conducted to evaluate water quality utilizing principal component analysis in the Nakdong River Estuary. From the results of analysis, water quality in the Nakdong River Estuary could be explained up to 65.3 Percente by three factors which were Included In river loadlnwastes from the Nakdong River and rainfalls : 39.1%1, sediment resuspension(13.7BS) and metabolism(12.5%). In the eastern part of estuary In flowing the Nakdong River, river loading factor score(factor 1 Pas higher than that In western part. Sediment resuspension factor score(factor 2) was high in shallow water, while metabolism factor score(factor 3) was high in deeper water. For seasonal variations of factors score, factor 1 was h19h- 1y related to rainfall season.

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낙동강 중류의 주상퇴적물에서 나타나는 퇴적 구조와 지화학적 특성의 수직적 변화 (Vertical Variation of Sediment Structure and Geochemical Characteristics of Core Sediment in Nakdong River Midstream)

  • 김신;이규열;김주언;이권철;안정민;이인정;정강영;임태효
    • 한국물환경학회지
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    • 제31권3호
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    • pp.304-312
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    • 2015
  • In this study, we tried to determine the vertical variation of sediment structure and geochemical characteristics, core sediment was collected in the Nakdong River midstream on August, 2014. Core sediment mainly composed of sand (51.48%) and silt (46.21%) and coarsing upward changed from sM to mS facies. IL and TOC were decreased from lower to upper layer. C/N ratio was lower than 10 so the organic matters were originated from underwater creatures and C/S ratio was decreased from lower to upper layer. Heavy metal (Al, Fe, Zn, Cr, Pb, Ni, Cu, Cd) content were decreased from lower to upper layer and seriously polluted condition is not. These results are thought to be due to the effect of natural and anthropogenic in the fluctuation of flow.