• Title, Summary, Keyword: Yeongsan river

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A Study on the Variation of the Combined Pollutant Delivery Load and Delivery Ratio in the Jangseong Stream Watershed (장성천 유역의 누가유달부하량 및 유달율 변화 분석에 관한 연구)

  • Song, Kwang-duck;Lee, Gi-Soon;Park, Seung-Ho;Shim, Hong-bin;Kim, Young-Suk;Kim, Shin-Jo;Kang, Tae-gu
    • Journal of the Korean Society of Urban Environment
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    • v.17 no.3
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    • pp.255-263
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    • 2017
  • This study estimated generation, discharge and delivery load of pollutants and its delivery ratio in the Jangseong stream watershed using flow data and monitored data on pollutant concentration. The combined pollutant delivery load curve determined from the estimated pollutant delivery load was applied to analyze the time of external pollutant loading and its form. The estimated pollutant delivery loads were 40.2~2,762.3 kg/d (mean 431.8 kg/d) for BOD and 3.3~153.9 kg/d (mean 24.5 kg/d) for TP. Delivery ratio of BOD and TP were 0.05~3.10 kg/d (mean 0.48 kg/d) and 0.05~2.44 kg/d (mean 0.39 kg/d), respectively. The combined pollutant delivery load curve above the point of inflection is shown to be concave function for BOD and TP. This study suggests that the combined pollutant delivery load be useful to identify the time of pollutant loading and to capture periods of high pollutant loading for water quality management.

Geochemical Characteristics and Contamination Assessment of Surface Sediments in Lower Yeongsan River System (영산강 하류권역 하상퇴적물의 지화학적 특성과 오염평가)

  • 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.13 no.5
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    • pp.251-262
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    • 2004
  • In order to investigate the geochemical characteristics of surface sediments in lower Yeongsan river system, sediment samples from the main stream of Yeongsan river, Gomakwon and Hampyeong streams were collected and analyzed for grain size and metal and organic carbon contents. The sediment types of the streams widely vary from pebble to mud. The metal contents in the sediments are mainly dependent on grain size of the sediments, geology around the streams and organic matter contents from the domestic sewage. Enrichment factor (EF) representing the degree of metal contamination in the sediments are relatively low in the study area. But, high Zn and Pb values seem to be from the study area, partly.

A Study on Characteristics of Water Quality using Multivariate Analysis in Sumjin River Basin (다변량 분석법을 이용한 섬진강 수계의 수질 특성 연구)

  • Park, Jinhwan;Moon, Myungjin;Lee, Hyungjin;Kim, Kapsoon
    • Journal of Korean Society on Water Environment
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    • v.30 no.2
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    • pp.119-127
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    • 2014
  • The objective of this study is to evaluate and analyze Sumjin River Basin water environment system. It was necessary to improve the water quality. The data were collected from 2010 January to 2012 December including Water Temperature, pH, DO, EC, $BOD_5$, COD, TOC, SS, T-N, T-P. The data were used to study were required to; Correlation Analysis; Principle Component Analysis; Factor Analysis. The results were as followed. According to correlation analysis on $BOD_5$ against COD, TOC it revealed that the each value of correlation coefficient were 0.715 and 0.719; this means the strength of the relationship is strong. The same analysis on T-P against $BOD_5$, COD, TOC, SS has revealed that the range of the correlation coefficient value fell between 0.482 and 0.608 which means strength of the relationship between them remained normal. Through correlation analysis, it has been found that all elements except T-N have high correlation. The results of principal component analysis to target the overall water quality was extracted to three main components. The cumulative contribution rate is 68.990%. In the case of seasonal water quality, Spring and Summer are extracted to each of four main components. The cumulative contribution rate is 81.515% and 73.550% respectively. Fall and Winter are extracted to each of three main components. The cumulative contribution rate is 65.072% and 72.721% respectively. There is no seasonality in the case of factor analysis. The first common factor is $BOD_5$, COD, TOC, SS, T-P, which were classified. Totally speaking, Sumjin River Basin water system gets highly affected by the nutrient salts, organic matter and suspended solid at the same time.

A Study on the Selection of Non-point Pollution Management Regions with High Priority Order in the Yeongsan River Basin (영산강수계 비점오염원 중점관리지역 선정에 관한 연구)

  • Lee, JaeChoon;Park, HyeLin;Lim, ByungJin;Lee, ChangHee;Lee, SuWoong;Lee, YongWoon
    • Korean Journal of Ecology and Environment
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    • v.45 no.4
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    • pp.347-355
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    • 2012
  • In this study, non-point pollution sources in the Yeongsan river basin are analyzed; then, the priority regions (areas divided on a small scale) of management are selected for efficient water management of the Seungcheon and Jooksan reservoirs, which were constructed as one of the 4 major rivers restoration projects. The priority regions are decided by using the criteria of the excessive rate of target water quality, non-point pollution load per unit area, total TP load and down flow distance. The results of this study are as follows. The upper 10% of the priority regions for non-point pollution management includes YB15, YB05, YB10, YB24, YB14 and YB11 for the Seungcheon reservoir watershed, and YC24, YC25, YC30, YC34, YC22 and YC17 for the Jooksan reservoir watershed. However, a few regions in each of the Seungcheon and Jooksan reservoirs need to be selected in higher order, and the non-point pollution removal facilities in the regions need to be installed with respect to budget, urgent matter, and so on.

Survey on Lake Environments in the Yeongsan and Seomjin River Basins - Based on 10 lakes such as Hadong and Sangsa - (영산강·섬진강수계 호소환경조사 - 하동호 등 10개 호소 중심으로 -)

  • Kim, Shin-Jo;Song, Hyo-Jeong;Park, Tae-Jin;Hwang, Moon-Young;Cho, Hang-Soo;Song, Kwang-Duck;Lee, Hyung-Jin;Kim, Young-Suk
    • Journal of Korean Society on Water Environment
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    • v.31 no.6
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    • pp.665-679
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    • 2015
  • Yearly mean temperature in the 29 lakes surveyed ranges from 12.6 (Suncheon) to 13.9℃ (Mokpo), the lowest in −2.7℃ (January) and the highest in 25.9℃ (July). Monthly mean the amount of rainfall recorded the highest of 336.7 mm in August and the lowest with 4.9 mm in January. A total of 424 species of phytoplankton were identified. They were 157 Chlorophyceae, 161 Bacillariophyceae, 39 Cyanophyceae, and 67 other algal taxa. The phytoplankton diversity were low in stream type reservoirs such as Guemho, Youngsan and Youngam. The population density of phytoplankton ranged from 19 to 53,161 cells/ml. Annual mean of total zooplankton abundance in 45 sites was 369±827 ind./L (n=180). Rotifers were the most common taxa and their relative abundance was high (65~77%). The benthic microinvertebrate fauna of 10 reservoirs of Jeonnam province were 71 species of 61 genera of 44 families of 16 orders of 7 classes of 4 phyla. Aquatic insects of Phylum Arthropoda were 50 species of 44 genera of 28 families of 6 orders. The number of individuals was 6,132. Diptera was highiest (41.3%), and Ephemeroptera (31.0%), Trichoptera (17.5%), Anellida (3.8%), Mollusca (3.3%), Crustacea (0.4%). Large hydrophytes were identified 32 taxa, 2 varieties 30 species 26 genera and 20 families. Especially, Jijung and Juam lakes require management such as physical remove of this ecosystem disturbance field plants. Fishes were identified total 44 taxa, such as 25 Cyprinidae (56.8%), 8 Cobitidae (17.0%), 3 Gobiidae (6.4%), 2 Bagridae (4.3%), 2 Osmeridae (4.3%), 2 Odontobutidae (4.3%), 2 Centrachidae (4.3%), 1 Siluridae (2.1%), and 1 Centropomidae (2.1%). A pale chub was dominant species (18.9%).

Phytoplankton Community in Reservoirs of Yeongsan and Seomjin River Basins, Korea (영산강.섬진강 수계 주요 호소의 식물플랑크톤 군집)

  • Na, Jeong-Eun;Jung, Myoung-Hwa;Cho, In-Sook;Park, Jong-Hwan;Hwang, Kyung-Sub;Song, Hyo-Jeong;Lim, Byung-Jin;La, Geung-Hwan;Kim, Hyun-Woo;Lee, Hak-Young
    • Korean Journal of Environmental Biology
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    • v.30 no.1
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    • pp.39-46
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    • 2012
  • The distributions of phytoplankton community are investigated from 29 reservoirs in Yeongsan and Seomjin River Basins, Korea. As a microalgal flora, a total of 424 species of phytoplankton were identified. They were 157 Chlorophyceae, 161 Bacillariophyceae, 39 Cyanophyceae, and 67 other algal taxa. The phytoplankton diversity were low in stream type reservoirs such as Kumho, Youngsan and Youngam Reservoirs. The population density of phytoplankton ranged from 29 cells $mL^{-1}$ to 53,161 cells $mL^{-1}$. The dominant phytoplankton species more than 20% of total standing crops were $Asterionella$ $formosa$, $Aulacoseira$ $ambigua$, $Aulacoseira$ $distans$, $Aulacoseira$ $granulata$, $Cyclotella$ sp., $Synedra$ $acus$, $Coelastrum$ $reticulatum$, $Pandorina$ $morum$, $Scenedesmus$ $arcuatus$, $Aphanothece$ $clathrata$, $Microcystis$ $aeruginosa$, $Phormidium$ sp. The concentration of chlorophyll $a$ ranged from 0.41 mg $m^{-3}$~220.72 mg $m^{-3}$, and showed highest concentration in Gaecho-je. The concentrations of TN and TP have no clear relationships with chlorophyll $a$ concentrations.

Community Size Structure of Zooplankton Assemblages in 29 Lentic Ecosystems on the Youngsan-Seomjin River Basin (2010~2011) (영산강, 섬진강 유역권내 29개 정수생태계의 동물플랑크톤 군집 크기 구조(2010~2011))

  • Kim, Hyun-Woo;La, Geung-Hwan;Park, Jong-Hwan;Song, Hyo-Jeong;Hwang, Kyung-Sub;Lim, Byung-Jin;Lee, Hak-Young
    • Korean Journal of Environmental Biology
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    • v.30 no.1
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    • pp.64-70
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    • 2012
  • This study compares the abundance and community structure of zooplankton organisms from the littoral and pelagic regions, and considers particularly trophic levels vs. zooplankton abundances. Zooplankton samples, collected every 3 months over a year from 2010 to 2011 at 29 temperate lakes and reservoirs, which belong to two different river basins (Youngsan and Seomjin River). The spatial pattern of rotifers was similar to that of total zooplankton abundance. This reflected the fact that rotifers strongly dominated the zooplankton community. There were considerable spatial variations in total zooplankton abundance (ANOVA, p<0.01), while there were no significant differences both in littoral and pelagic regions in abundance of zooplankton (ANOVA, p=0.205). The mean abundance of zooplankton in eutrophic systems was much higher than that of mesotrophic systems, while significant difference in number of species and diversity index were not shown in both trophic systems.

Characteristics of Nitro-nutrients and Phytoplankton Dynamics in the Yeongsan River after Weir Construction (보 건설 이후 영산강 보 구간에서의 질소계열 영양염류 및 식물플랑크톤 동태)

  • Seo, Kyung-Ae;Na, Jeong-Eun;Ryu, Hui-Seong;Kim, Kyunghyun
    • Journal of Korean Society on Water Environment
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    • v.34 no.4
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    • pp.423-430
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    • 2018
  • Insomuch as it is important to manage water quality, from the perspective of water management, it is essential to understand the effect of the weirs on water quality and phytoplankton dynamics in various regions. The purpose of this study is to investigate the characteristics of nitro-nutrients, as well as occurrences and succession patterns of phytoplankton, in the river sections of the two weirs in the Yeongsan River for the five years (from 2012 to 2016) after the weir construction. In respect to this data, the average water temperature measured at the representative point in the section of the Seungchon Weir ($17.1^{\circ}C$) was higher than that of the Juksan Weir ($16.6^{\circ}C$) by comparison. By way of an analysis of this data, it was found that the water quality variables such as, organic matter, nitrogen nutrients and phosphorus nutrients were improved gradually during the period, but the degree of the improvement differs as noted and measured between the weirs. Under the circumstances, it is especially noted that the $NH_3-N$ concentration was higher for the point of the Seungchon Weir (2.204 mg/L) than that of the Juksan Weir (1.157 mg/L). This indicates that effluent as seen from sewage treatment plants and hydrological feature near the densely population area, could be the main cause for the incidence of water pollution in the upstream section of the Seungchon Weir. Additionally, the phytoplankton analysis showed that a relative abundance of diatoms and green algae were 56.9 % and 25.8 % respectively. However, it is noted that the cyanobacteria was measured lower as 10.7 %. Also, in the study sites cell density and occurrence frequency of cyanobacteria were relatively lower than compared to the same measurements noted in other rivers.

Comparative Analysis of Fish Fauna and Community Structures Before and After the Artificial Weir Construction in the Mainstreams and Tributaries of Yeongsan River Watershed (영산강 수계의 본류 및 지천에서 4대강 사업 전.후의 어류분포 및 군집구조 특성 비교)

  • Lee, Jae Hoon;Han, Jeong-Ho;Lim, Byung Jin;Park, Jong-Hwan;Shin, Jae-Ki;An, Kwang-Guk
    • Korean Journal of Ecology and Environment
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    • v.46 no.1
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    • pp.103-115
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    • 2013
  • The purpose of this study was to analyze fish fauna and species compositions along with trophic guilds, tolerance indicators, and fish community conditions before weir construction (BWC) and after weir construction (AWC) in the Yeongsan River watershed. Total 45 and 44 fish species were sampled in BWC and AWC, respectively without any distinct differences through weir constructions. Fish fauna analysis revealed that the dominant species was the same, Zacco platypus with 24.3% and 20.8% in BWC and AWC, respectively. However, the subdominant species were Carassius auratus with 8.9% in BWC but Opsarichthys uncirostris amurensis with 20.3%, almost identical that of the dominant species AWC. This phenomenon showed the distinct modification of species composition in the watershed. We sampled the $1^{st}$ class endangered species, Liobagrus obesus in tributary stream as previously reported. Also Culter brevicauda was sampled in the mainstream of Yeongsan River watershed and this was the first sampled record in this watershed. One of the most important features were an increase of exotic species, such as Micropterus salmoides and Lepomis macrochirus, with 3.2% BWC vs. 10.2% AWC as well as the increase in tolerant species with 49.2% BWC vs. 73.7% AWC, indicating ecological degradation through weir construction. Overall, our results indicated that fish fauna and composition analyses showed distinct ecological degradations related to increases of exotic and tolerant species AWC. Further long-term studies of fish monitoring should be conducted in the future to configure existent status of river conditions and to provide key information in order to conserve the healthy ecosystem.