• Title/Summary/Keyword: water quality of Hongcheon river

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The Water Quality Assessment based on the Algal Communities and Biotic Indices in Hongcheon river, Gangwon-do (강원도 홍천강의 조류군집과 생물학적 지수에 의한 수질 평가)

  • Baek, Jun Soo;Kim, Hun Nyun;Lee, Ok-Min
    • Journal of Korean Society on Water Environment
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    • v.30 no.6
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    • pp.596-604
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    • 2014
  • This research has studied the physicochemical environmental factors and communities of epilithic diatom and phytoplanktons at Hongcheon river from December 2011 to September 2012. In case of TN, the result was hypertrophic, and for TP, it ranged from mesotrophic to eutrophic. As for BOD, Hongcheon river was rated level II or better, according to the water quality level; values were found to be below 3mg/L at most sites. Total of 83 and 114 taxa of epilithic diatom and phytoplanktons respectively, were found during the research. When assessed using the TSI, it ranged from oligomesotrophic to eutrophic. In case of DAIpo, it ranged from 64.1 to 99.5, and TDI ranged from 51.5 to74.0. These results signify good water quality, level B or better, for Hongcheon river. P-IBI was rated moderate to low, which showed higher pollution than other indices. Among the biological water quality measures analyzed in the Hongcheon river study, DAIpo best matches TDI and BOD, while TDI showed greater pollution. Therefore, P-IBI appears to be inappropriate when assessing the domestic small rivers and lakes.

Effect of Municipal Sewage Treatment Plant on Water Quality in Western Kangwon Area (강원 영서지역 하수처리장이 수질에 미치는 영향)

  • Huh In-Ryang;Choi Ji-Yong;Kim Yeong-Jin;Jeong Ui-Ho
    • Journal of Environmental Health Sciences
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    • v.31 no.4 s.85
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    • pp.235-240
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    • 2005
  • The effects of municipal sewage treatment plants on the water quality and effluent loading were investigated. BOD removal rates from Wonju, Hoengseong, and Hongcheon municipal sewage treatment plants were $88.9\%,\;80.6\%,\;90.7\%$ and T-P removal rates were $47.3\%,\;56.5\%,\;71.6\%,$ respectively. Also, BOD effluent leading from WonJu, Hoengseong, and Hongcheon treatment plants were 1,520 kg/day, 75 kg/day, 55 kg/day and T-P effluent loading were 203.9 kg/day, 4.2 kg/day, 4.0 kg/day, respectively. In terms of water quality distribution by distance of flow, BOD of the Seom river rapidly rose from 1.6 mg/l to 4.0 mg/l and T-P rose from 0.034 mg/l to 0.321 mg/l. Also BOD of the Hongcheon river showed a slowly rise from 1.1 mg/l to 1.4 mg/l and T-P from 0.011 mg/l to 0.026 mg/l. In conclusion, the effects of municipal sewage treatment plants on the water quality proved that T-P was higher than BOD. Consequently, in order to improve water quality, it is necessary to adopt an advanced sewage treatment system like nutrient removal.

Estimation of Contribution Ratio and Community Sewerage Treatment Efficiency by using Advanced Sewage Treatment in the Basin of Hongcheon-river (홍천강 유역의 하수고도처리를 적용한 마을하수처리 효율 및 기여율 평가)

  • Park, Soo-Jin
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.7
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    • pp.3570-3576
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    • 2013
  • This paper calculated advanced sewage treatment efficiency and reduction pollution loads to estimation contribution ratio of for community sewerage in Hongcheon-gun County. The A2/O and SBR methods showed overall high treatment efficiency of 95% and 94% respectively, and SS was 80%. On the other hand, T-N and T-P showed relatively low processing efficiency of 56% and 60% respectively, but it was observed that SS showed high 96% in the MBR method. Next, by the result of yearly water change analysis on water quality of Hongcheon River which is the discharge river of community sewerage, it was observed that water quality was greatly deteriorated by COD, T-N and T-P. However, installation and operation of community sewerage showed high pollution load reduction in general water quality item by more than 80%, and in T-N and T-P by 58% and 68% respectively. It is expected that community sewerage will greatly contribute in water quality improvement of Hongcheon River.

Water Quality Analysis of Hongcheon River Basin Under Climate Change (기후변화에 따른 홍천강 유역의 수질 변화 분석)

  • Kim, Duckhwan;Hong, Seung Jin;Kim, Jungwook;Han, Daegun;Hong, Ilpyo;Kim, Hung Soo
    • Journal of Wetlands Research
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    • v.17 no.4
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    • pp.348-358
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    • 2015
  • Impacts of climate change are being observed in the globe as well as the Korean peninsula. In the past 100 years, the average temperature of the earth rose about 0.75 degree in celsius, while that of Korean peninsula rose about 1.5 degree in celsius. The fifth Assessment Report of IPCC(Intergovermental Panel on Climate Change) predicts that the water pollution will be aggravated by change of hydrologic extremes such as floods and droughts and increase of water temperature (KMA and MOLIT, 2009). In this study, future runoff was calculated by applying climate change scenario to analyze the future water quality for each targe period (Obs : 2001 ~ 2010, Target I : 2011 ~ 2040, Target II : 2041 ~ 2070, Target III : 2071 ~ 2100) in Hongcheon river basin, Korea. In addition, The future water quality was analyzed by using multiple linear regression analysis and artificial neural networks after flow-duration curve analysis. As the results of future water quality prediction in Hongcheon river basin, we have known that BOD, COD and SS will be increased at the end of 21 century. Therefore, we need consider long-term water and water quality management planning and monitoring for the improvement of water quality in the future. For the prediction of more reliable future water quality, we may need consider various social factors with climate components.

Water Quality Improvement Evaluation of Community Sewerage by using Advanced Sewage Treatment (고도하수처리공법을 적용한 마을 하수도의 수질개선 평가)

  • Choi, Han-Kuy;Ko, Jeong-Sup;Park, Soo-Jin
    • Journal of Industrial Technology
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    • v.32 no.A
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    • pp.57-64
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    • 2012
  • In order to examine the tailorability of advanced sewage treatment of a separated sewer pipe, we observed the quality of leaked water in a reactor. A2C affiliation and MBR affiliation decreased by over 78% in cases of BOD, COD, and SS. SBR affiliation decreased by 79.1% in a case of T-N. Overall, the efficiency of T-N on the above affiliations was low. SS had the high efficiency in MBR affiliation. In the end, examination of water quality improvement showed that the quality was improved from 20% to 90%; hence, it is expected that this treatment can protect the water resources of the Hongcheon River and makes it easier to use the water of the river.

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Application analysis of advanced sewage treatment on the separated sewer pipe (분류식 하수관거에서의 고도하수처리공법 적용성 해석)

  • Park, Soo-Jin;Ko, Jeong-Sup;Baek, Kyung-Won;Choi, Han-Kuy
    • Proceedings of the Korea Water Resources Association Conference
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    • 2012.05a
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    • pp.772-777
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    • 2012
  • In order to examine the tailorability of advanced sewage treatment of a separated sewer pipe, we observed the quality of leaked water in a reactor. A2C affiliation and MBR affiliation decreased by over 78% in cases of BOD, COD, and SS. SBR affiliation decreased by 79.1% in a case of T-N. Overall, the efficiency of T-N on the above affiliations was low. SS had the high efficiency in MBR affiliation. In the end, examination of water quality improvement showed that the quality was improved from 20% to 90%; hence, it is expected that this treatment can protect the water resources of the Hongcheon River and makes it easier to use the water of the river.

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Estimation of Habitats Suitability Index based on Hydraulic Conditions (수리조건을 이용한 생물서식처 적합도 지수 산정 -홍천강을 대상으로-)

  • Lee, Jae-Yil;Lee, Gyu-Sung;Ahn, Hong-Kyu;Ha, Sung-Ryong
    • Journal of Wetlands Research
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    • v.13 no.1
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    • pp.149-160
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    • 2011
  • This study developed a HSI for the creatures in Hongcheon River in order to analyze the conditions proper for habitats. For the index, the investigator identified a total of seven items encompassing hydraulic characteristics such as flow velocity and water depth, and water quality characteristics such as water temperature, BOD, DO, TN, and TP. The subject river was simulated, inspected, and revised with a two-dimensional river model (RMA-2) and water quality model (QUAL2E). Using GIS, the developed index was divided by section by reflecting river characteristics and compared and analyzed with the statistics. The river was divided into a total of 29 reaches by reflecting the basic characteristics and the features of the hydraulic coefficient on the cross-sections of the river. According to the analysis results, the fish scored the highest mean of the overall habitat suitability index of 0.769 at reach 27. Each of the variables had the following mean values: 0.122 m/s for flow velocity, 0.782m for water depth, $14.3^{\circ}C$ for water temperature, 0.68 mg/l for BOD, 10.3 mg/l for DO, 2.4 mg/l for TN, and 0.0121mg/l for TP.

A Study on the Fish Community, the Habitat and the Species Diversity of the Hongcheon Soksacheon and the Gyebangcheon in Kangwondo (강원도 홍천 속사천과 계방천의 어류군집, 서식환경 및 생물다양성에 관한 연구)

  • 정규회;심재한
    • Korean Journal of Environment and Ecology
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    • v.11 no.1
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    • pp.100-110
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    • 1997
  • To clarify the structure and function of ecosystem and establish the method for the conservation of biodiversity and community analysis at Soksacheon and Gyebangcheon, the authors surveyed the aquatic environment and freshwater fish fauna at 13 stations from July, 1995 to June, 1996. Collected 1,908 individuals were belong to 20 Species, 4 Oredr, 1 Suborder, 6 family, 7 Subfamily. The detail results are as follows. 1. It was confirmed that most of the surveyed stations were mountain valley of river type Aa, Ab. River structures were mixed with pebble, sand, rock and water quality of Soksacheon were pH(7.41), [COND.(0.051), TURB.(10.00), DO(8.66), W.T.(15.4)] and Gyebangcheon were pH(7.44), [COND.(0.097), TURB.(21.59), DO(9.35), W.T.(15.4)]. 2. Among them, 18 species were primary freshwater fishes(99.98%) and 2 species of pheripheral freshwater fishes(0.02%). 12 species(60%) of them were endemic species of Korea and they were Moroco kumgangenesis, Microphysogovio longidorsalis, Cobitis rotundicaudata, Misgurnus anguillicaudatus, Coreoleucisus splendidus, Cobitis longicorpus, Oncorhynchus masou ishikawai, Brachymystax lenok, Hemibarbus longirostris, Silurus microdorsalis, Cobitis koreensis koreensis and Hemibarbus mylodon. 3. Dominant species were Moroco kumgangenesis(46.85%) and Zacco temmincki(27.35%).

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