• Title, Summary, Keyword: Yeongsan river

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Establishment of Watershed Management System for Efficient Water Management in the Yeongsan and Seomjin River Basin (영산강·섬진강 수계 효율적 물관리를 위한 유역관리 시스템 구축)

  • Joung, Hee-Joung;Jung, Jae-Woon;Kim, Kap-Soon;Park, Ha-Na;Lim, Byung-Jin;Huh, Yu-Jeong;Lee, Jun-Bae
    • Korean Journal of Environmental Agriculture
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    • v.31 no.2
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    • pp.200-204
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    • 2012
  • BACKGROUND: Recently, the project for improvement of water quality and preservation of the Yeongsan and Seomjin river basin was actively promoted. However, the publicity for many results of the project is not actively done, thus they are rarely used. Furthermore, there are not sufficient information about the projects preformed by other research institutions. Therefore, the watershed management system for efficient water management is needed in the Yeongsan and Seomjin river basin. CONCLUSION: Firstly, establishment of the Yeongsan and Seomjin river basin management research center, Secondly, construciton of wed-based water management research network. These results will serve as a basic data for efficient water management.

Analysis of Relationship Between Water Quality Parameters with Land Use in Yeongsan River Basin (영산강 수계의 토지이용과 수질항목 간의 상관관계 분석)

  • Park, Jinhwan;Moon, Myungjin;Kim, Kapsoon
    • Journal of Environmental Impact Assessment
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    • v.23 no.1
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    • pp.19-27
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    • 2014
  • The purpose of this study is to provide a base line data to improve the water quality in the Yeongsan River basin. As the major factor that affects the water quality of Yeongsan River is nonpoint pollution source, in order to find a resolve to improve the quality, a study was conducted to identify the correlation between the stream water quality and that of the land use. The study showed that the concentration of the contents in the water from the agricultural land environment was found to be higher as oppose to that found in the content of the water from the forest land. As a result, it can be deducted that agricultural land deteriorates water quality whereas that of the forest land is of much better quality. Therefore, it is highly recommended to take advanced improved care of agricultural land close to a water source to improve the quality of Yeongsan River basin.

A Study on the Waterway Restoration and its Utilization of the Yeongsan River (영산강의 주운복원과 활용방안 연구)

  • Kim, Jong-Il
    • Journal of the Korean association of regional geographers
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    • v.11 no.1
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    • pp.40-53
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    • 2005
  • The Yeongsan River had played an important role as s waterway, but in 1981, the Yeongsan River Estuarin Barrage had been constructed, the waterway had been cut off. Since then, in the lower Yeongsan River basin, discussions about the waterway restoration and its utilization of the Yeongsan River has been proposed. But these discussions have not been examined thoroughly with geomorphological and hydrological characteristics of river charmel The waterway restoration and its utilization in the Yeongsan River should be based on scientific validity. In case of considering the conditions of the Yeongsan River, it is desired that the small ship for environmental survey and ecotourism is navigable from Gujinpo to Yeongsan River Estuarin Barrage by dredging a parts of river channel. To devise a plan about restoration and its utilization of waterway, it is necessary that regional and local governments, related administrative agencies, specialists, and NGO should develop the participation and cooperation systems based on governance.

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Evaluation of Pollutant Characteristics in Yeongsan River Using Multivariate Analysis (영산강 수계 오염특성 파악을 위한 다변량 통계분석법의 적용)

  • Jung, Soojung;Lee, Dongjin;Hwang, Kyungsup;Lee, Kyounghee;Choi, Kyoungchuk;Im, Sangsun;Lee, Yunhee;Lee, Jaeyoung;Lim, Byoungjin
    • Korean Journal of Ecology and Environment
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    • v.45 no.4
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    • pp.368-377
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    • 2012
  • This study evaluated the water quality of Yeongsan River by multivariate analysis using the data collected during 2001~2010. Water quality in Yeongsan River could be explained up to 75.2% by four factors, which were included in loading of nutrients (32.021%) and organic matters (17.453%), seasonal variation (14.775%) and microbes (10.951%). The results of cluster analysis were classified into three groups by factor 1 and 2, which has different water quality characteristics. Group 1 included sampling stations located in the upper stream and estuary dyke of Yeongsan River, group 2 included Gwangju 1 and Gwangsan affected by domestic sewage of Gwangju-cheon, and group 3 included sampling stations located in the midstream around the livestock farm and farmland.

Distribution Characteristics of Organic Matters and Nutrients in Surface Sediments of Yeongsan River Basin (영산강 수계 표층 퇴적물의 유기물 및 영양염류 분포 특성)

  • Bong, Kimoon;Kang, Taewoo;Yang, Haejong;Han, Jonghak;Yang, Wonjun;Jeong, Hyojin;Jung, Heejung;Hwang, Soonhong;Kim, Kyunghyun
    • Journal of the Korean Society of Urban Environment
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    • v.18 no.4
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    • pp.455-463
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    • 2018
  • This study was carried out to assess the distribution and pollution level of organic matters and nutrients in surface sediments of the Yeongsan River Basin. The surface sediments were collected from the mainstream (12) and tributaries sites (4) for two years from 2015 to 2016, and the particle sizes, organic matters (Ignition Loss, COD, TOC) and nutrients (TN, TP, SRP) were analyzed. The distribution of particle sizes was dominated by sand in the upstream sites (MS1-MS7) and by silt loam in the downstream sites (MS8-MS12), but MS3 and MS6, located slightly upstream of the two weirs, were found to be mostly loamy sand and silt loam, respectively. As a results of the correlation assessment, the organic matters (IL, COD, TOC) were strongly correlated with particle sizes, while the nutrients (TP, SRP) were weak except for TN. The concentrations of organic matter and nutrient were higher at the downstream and the sites nearby the two weirs (MS3, MS6). In particular, the TP concentration at the MS3 site sampled in the second half period of the years was higher than that in the first half periods. Comparing of sediments criteria, the organic matters and nutrients were evaluated to have almost no toxic effects at all sites.

Location Characteristics of the Jar Coffins in the Yeongsan River Basin on the Drainage Network (하계망으로 본 영산강 유역 옹관묘의 입지특성)

  • Lee, Ae Jin;Park, Ji Hoon;Lee, Chan Hee
    • Journal of The Geomorphological Association of Korea
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    • v.23 no.3
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    • pp.57-66
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    • 2016
  • The objective of this study is to find out geomorphological characteristics of historical ruins where people produced and consumed large jar coffins excavated in the Yeongsan river basin using the map of old drainage network to restore distribution network. For this purpose, we chose the 21 consumption sites. The results are as follows. First of all, large jar coffins(relics, 47.6% of total) in the Yeongsan River basin were located in Sampo stream basin, almost all of them were located within the Yeongsan River main stream basin and Sampo stream basin. Also, distance from all consumption site to river was within about 2km. Therefore, it is thought that the all consumption sites are located at the place of the gift of nature that was very favorable to water transport of jar coffins. The results of this study may be used as basic data for research of cultural relics in the Yeongsan river basin.

Quantifying nitrogen source contribution ratios using stable isotope method: Application of Bayesian mixing model (안정동위원소를 이용한 하천에서의 질소오염원 기여율 정량화: Bayesian 혼합모델의 적용)

  • Nam, Tae-Hui;Ryu, Hui-Seoung;Kang, Tae-Woo;Han, Yeong-un;Kim, Jihyun;Lee, Kyounghee;Hwang, Soonhong;Kim, Kyunghyun
    • Journal of Korean Society on Water Environment
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    • v.35 no.6
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    • pp.510-519
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    • 2019
  • The 'Stable Isotope Analysis in R' (SIAR), one of the Bayesian mixing models for stable isotopes, has been proven to be useful for source apportionment of nitrates in rivers. In this study, the contribution ratios of nitrate sources were quantified by using the SIAR based on nitrogen and oxygen stable isotope measurements in the Yeongsan River. From the measurements, it was found that the values of δ15N-NO3 and δ18O-NO3 ranged from -8.2 ‰ to +13.4 ‰ and from +2.2 ‰ to +9.8 ‰, respectively. We further analyzed the contribution ratios of the five nitrate sources by using the SIAR. From the modeling results, the main nitrate source was found to be soil N (29.3 %), followed by sewage (26.7 %), manure (19.6 %), chemical fertilizer (17.9 %) and precipitation (6.3 %). From the results, it was found that the anthropogenic sources, i.e., sewage, manure and chemical fertilizer contribute 64.2% of the total nitrate inflow from the watershed. Due to the significant correlation of δ15N-NO3 and lnNO3- in this study, the fractionation factors reflecting the biogeochemical processes of stable isotope ratios could be directly obtained. This may make the contribution ratios obtained in this study more precise. The fractionation factors were identified as +3.64 ± 0.91 ‰ for δ15N-NO3 (p<0.01) and -5.67 ± 1.73 ‰ for δ18O-NO3(p<0.01), respectively, and were applied in using the SIAR. The study showed that the stable isotope method using the SIAR could be applied to quantitatively calculate the contribution ratios of nitrate sources in the Yeongsan River.

Water Quality Assesment of the Lower Yeongsan River System (영산강 하류권역 하천수의 수질평가)

  • Youn, Seok-Tai;Koh, Yeong-Koo;Oh, Kang-Ho;Moon, Byoung-Chan;Kim, Hai-Gyoung
    • Journal of Environmental Impact Assessment
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    • v.12 no.4
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    • pp.259-270
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    • 2003
  • To investigate the water quality and the pollution state of lower Yeongsan river system, 38 water samples were taken from the main stream of the Yeongsan river, Gomakwon and Hampyeong streams of the system in dry and flood seasons, May and August, 2001. The Yeongsan river is typically natural in accordance with pH-& diagram. But the chemistry based on Piper's diagram indicates that the river is influenced by seawater. BOD increases as the sampling sites are approaching the downstream in Gomakwon and Hampyeong streams overwhelming WQS V grade of 12.40mg/l. T-N and T-P of the river are mainly loaded not in above branch streams but in the main stream of the river, which are caused by manure for farming, domestic animal discharges and life-sewage, in possible. Meanwhile, heavy metal contents are below WQS or not detect in whole water samples. So, it shows that the above river waters be polluted by not industrial but life/agricultural foul waters.

An Analysis of Long-term Changes in Water Quality of Geumho River using Statistical Techniques

  • Jung, Kang-Young;Cho, Sohyun;Ha, Don-woo;Kang, Tae-woo;Lee, Yeong Jae;Han, Kun-Yeun;Kim, Kyunghyun
    • Journal of Environmental Science International
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    • v.27 no.10
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    • pp.883-899
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    • 2018
  • In this study, water quality data of eight main sites in the Geumho River watershed were collected and analyzed for long-term changes in water quality over the period from 2005 to 2015. The results showed that BOD concentration was gradually improved by the Total Maximum Daily Load (TMDL), stages 1 and 2. Recently, a tendency of increasing BOD concentration was observed in the downstream section of the river. The concentration of COD was analyzed to be contaminated throughout the water system regardless of the water quality improvement project, and the TN concentration tended to increase in the midstream of the river from 2013. The TP concentration has clearly decreased from 2012 after the second stage of TMDL. For the statistical analysis of PCA ordination, monthly water qualities (pH, DO, Electrical Conductivity (EC), Water Temperature (WT), BOD, COD, TN, TP, TOC, and SS) and flow rate data for 5 years from 2012 to 2016 were used. Seasonally the Geumho River showed an increase in the TN concentration at point sources during the dry season (December to February). TP showed the effect of non-point sources in the summer, because rainfall has caused a rise in flow rate in the upstream. Besides, the origin of pollution source was changed from non-point sources with BOD, COD, and TOC.

Accuracy Evaluation and Alert Level Setting for Real-time Cyanobacteria Measurement Using Receiver Operating Characteristic Curve Analysis (ROC 분석을 이용한 수질자동측정소 실시간 남조류 측정의 정확성 평가 및 경보기준 설정)

  • Song, Sanghwan;Park, Jong-hwan;Kang, Tae-Woo;Kim, Young-Suk;Kim, Jihyun;Kang, Taegu
    • Journal of Korean Society on Water Environment
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    • v.33 no.2
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    • pp.130-139
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    • 2017
  • With the need to evaluate accuracy of real-time measurement of cyanobacterial fluorescence to determine cyanobacterial blooms, this research examined 357 paired data (2013-2016) comprising both microscopic toxic cyanobacterial cell counts and concurrent real-time cyanobacterial concentrations at 2 sites (YS1 and YS2) in Yeongsan river. The increase in real-time cyanobacterial concentration was closely associated with the exceedance of 5,000 cyanobacterial cells/ml (odds ratio [OR] 1.07, 95% confidence interval [CI] 1.03-1.12) and 10,000 cells/ml (OR 1.08, 95% CI 1.04-1.12) at YS2 site. The area under the receiver operating characteristic (ROC) curve for the real-time cyanobacterial measurement at the YS2 site was 0.93, which indicates the measurement provides a high accurate detection of cyanobacterial blooms. On the ROC curve, the early alert levels of real-time cyanobacteria ranging $16-23{\mu}g$ chl-a/L would produce acceptable sensitivity of 79% and specificities greater than 90%. The real-time fluorescence measurement was found to be an accurate indicator of cyanobacteria and can serve as a tool for detecting toxic cyanobacterial bloom events in Youngsan river.