• Title, Summary, Keyword: Pollution load index

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Analysis of Pollution Characteristics in the Mainstream and Its Tributaries of Gongneung Stream Using Water Quality Index and Pollution Load Data (통합수질지수 및 오염부하자료를 이용한 공릉천 유입지천과 본류의 오염특성 분석)

  • Yu, Jae-Hyun;Lee, Han-Saem;Lim, Byung-Ran;Kang, Joo-Hyoung;Ahn, Tae-Ung;Shin, Hyun-Sang
    • Journal of Korean Society on Water Environment
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    • v.36 no.2
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    • pp.125-136
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    • 2020
  • In this study, we identified the major pollution-zones of the mainstream and its tributaries of Gongneung stream and investigated their pollution sources based on water quality, flowrate and pollution-load data of the stream having the characteristics of the urban-rural complex to examine the effect of the tributaries on the water quality changes in the mainstream. The water quality and flowrate data were collected for 10 months (2018 ~ 2019) at 3 points of mainstream and ten tributaries. Water quality index (WQI), load duration curve (LDC), discharge load density (DLD)and delivery ratios for each tributary were obtained so as to investigate the pollution characteristics and some of the information visualized on GIS. The main pollution-zone in the Gongneung stream was in the middle and lower streams, and the tributaries that may affect the pollution of the area were JS, JY, SL and SM. JS and SL had low WQI levels (34.7/37.5) and DLD (kg/d/㎢) of BOD and T-P were relatively high in JY (99.2/6.00) and SL (60.0/2.07). BOD and T-P delivery ratios in JS were high (0.94/0.83), suggesting that JS had significant influence on the water quality of the main pollution-zone in the Gongneung stream. Meanwhile, SM having a high T-P delivery ratio (0.97) was found to be more affected by the non-point source due to the higher LDC excess rate (%) in the low flow compared to high flow. This study provides basic data on the water quality and pollution characteristics of the Gongneung stream, and the analysis results are expected to be used as examples for identifying the main pollution-zone and tributaries of stream and their pollution sources.

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

  • Ahn, Jung Min;Im, Teo Hyo;Kim, Sungmin;Lee, Sangsu;Kim, Shin;Lee, Kwon Cheol;Kim, Yong Seok;Yang, Deuk Seok
    • Journal of Environmental Science International
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    • v.27 no.7
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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.

Speciation and Ecological Risk Assessment of Trace Metals in Surface Sediments of the Masan Bay (마산만 표층퇴적물에서 미량금속의 화학적 존재형태 및 생태계 위해도 평가)

  • Sun, Chul-In;Lee, Young-Ju;An, Jung-Hyun;Lee, Yong-Woo
    • The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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    • v.19 no.2
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    • pp.155-163
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    • 2014
  • Total concentration and chemical speciation of trace metals (Cu, Pb, Zn, Cd, and Ni) were determined to evaluate pollution level and potential ecological risk in surface sediments of the Masan Bay. The results showed that the trace metal concentrations, except for Ni, were high in the inner Masan Bay. Based on the chemical speciation of metals in sediments, the percentage of total concentrations of Cd and Pb in non-residual fraction was 92% and 88%, respectively, indicating that these metals originated mainly from anthropogenic sources. However, Ni (70%) was dominant in residual fraction. Pollution load index (PLI) and ecological risk index (ERI) values in the inner bay indicate the presence of anthropogenic pollution and considerable-moderate ecological risk, respectively. Ecological index (Ei) value for Cd was high at most stations in the Masan Bay, and Cd content was the highest in acid soluble fraction, which presents the highest ecological risk. The results obtained in this study indicate that Cd presents a high potential ecological risk to benthic biota in the Masan Bay.

The Effect of Aircraft Traffic Emissions on the Soil Surface Contamination Analysis around the International Airport in Delhi, India

  • Ray, Sharmila;Khillare, P.S.;Kim, Ki-Hyun
    • Asian Journal of Atmospheric Environment
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    • v.6 no.2
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    • pp.118-126
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    • 2012
  • To investigate the effect of aircraft traffic emissions on soil pollution, metal levels were analyzed for 8 metals (Fe, Cr, Pb, Zn, Cu, Ni, Mn and Cd) from the vicinity of the Indira Gandhi International (IGI) airport in Delhi, India. The texture of the airport soil was observed to be sandy. Among the metals, Cd showed minimum concentration ($2.07{\mu}g\;g^{-1}$), while Fe showed maximum concentration ($4379{\mu}g\;g^{-1}$). The highest metal accumulation was observed at the landing site. Significant correlations were observed between metals and different textures (sand, silt, and clay) as well as with organic carbon (OC). The results indicate that grain size play a major role in OC retention in soil and subsequently helps in adsorption of metals in soil. M$\ddot{u}$ller's geoaccumulation index (I-geo) showed that airport soil was contaminated due to Cd and Pb with the pollution class 2 and 1, respectively. Pollution load index of the airport site was 1.34-3 times higher than the background site. The results of factor analysis suggested that source of the soil metal is mainly from natural weathering of soil, aircraft exhaust, and automobile exhaust from near by area. With respect to Dutch target values, the airport soils showed ~3 times higher Cd concentration. The study highlighted the future risk of enhanced metal pollution with respect to Cd and Pb due to aircraft trafficking.

A Study on the Method of Implementation Assessment for Total Maximum Daily Load Management (수질오염총량관리를 위한 효율적 이행평가방안 연구)

  • Park, Jun-Dae;Park, Ju-Hyun;Rhew, Doug-Hee;Jeong, Dong-Hwan
    • Journal of Environmental Impact Assessment
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    • v.17 no.2
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    • pp.125-132
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    • 2008
  • It is desirable that implementation assessment (IA) should be carried out efficiently in order to make successful progress of Total Maximum Daily Load (TMDL) in watershed management. There are many difficulties in the process of the implementation assessment because of the early stage in the application of TMDL in Korea. This study reviewed the present status of IA and proposed the methodology of its improvement such as flexible application of TMDL ledger, and standardization of assessment index and criteria. The deficient time for assessment period could be corrected by the consideration of the post-procedure after the submission of IA report.

Evaluation of the tributaries by influence index on the mid-lower portion of the Nakdong River basin

  • Lee, Shun-Hwa;Jung, Seung-Gyu;Park, Seoung-Muk;Lee, Byung-Dae
    • Environmental Engineering Research
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    • v.23 no.2
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    • pp.150-158
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    • 2018
  • The deteriorating role of Nakdong River due to the Four Major Rivers Project has caused a series of problems, including water pollution, drying streams, aggravation of the hydroecology. Geumho River and Gyeongseong-cheon had a higher concentration index and is believed to impact the water quality of the main stream. The influence index of Geumho River and Nam River between 2015 and 2016, which have a large amount of discharge, was the highest among the tributaries in terms of the load material balance. Showing the highest average concentration and average load in the index assessment, Geumho River is believed to require an intensive management for improving the water quality of the main stream. Furthermore, when the cumulative percentage of the average concentration and average load was compared based on the water quality improvement of the tributaries mixed to Nakdong River, which was set to 60%, Geumho River, Nam River, Topyeong-cheon, and Cha-cheon, which showed the highest ratio in that order, were determined to require a water quality management program as a priority.

A Study on the Analysis and Evaluation of Vulnerability Index for the Management of Nonpoint source in SoOak River Watershed (소옥천 유역 비점오염 관리를 위한 취약성 지수분석 및 평가에 관한 연구)

  • KAL, Byung-Seok;MUN, Hyun-Saing;HONG, Seon-Hwa;PARK, Chun-Dong;GIL, Han-nui;PARK, Jae-Beom
    • Journal of the Korean Association of Geographic Information Studies
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    • v.22 no.2
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    • pp.107-120
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    • 2019
  • In this study, the characteristics of watershed and pollution source were investigated in SoOakcheon located in the upper stream of Daecheong Lake. The Dimension Index method was applied to index various watershed and pollution source data. The influence factors of each pollutant source were derived through correlation analysis between selected index and water quality monitoring data. BOD and COD were significantly influenced by population density and land area ratio, T-N by CN and rice area ratio, and T-P by population density and land area ratio, respectively. The discharge load is often used to establish non-point source countermeasures, but there is a difference between the water load and the water load in the lake or river. Therefore, in order to manage non-point pollution efficiently, it is necessary to analyze influential factors with high correlation with water quality and to manage the relevant factors with priority.

The impact of municipal waste disposal of heavy metals on environmental pollution: A case study for Tonekabon, Iran

  • Azizpour, Aziz;Azarafza, Mohammad;Akgun, Haluk
    • Advances in environmental research
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    • v.9 no.3
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    • pp.175-189
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    • 2020
  • Municipal solid waste disposal is considered as one of the most important risks for environmental contamination which necessitates the development of strategies to reduce destructive consequences on the ecosystem as related especially to heavy metal accumulation. This study investigates heavy metal (i.e., As, Cd, Co, Cr, Cu, Mn, Ni, Pb, Zn) accumulation in the Tonekabon region, NW of Iran that is related to city waste disposal and evaluates the environmental impact in the Caspian Sea coastal region. For this purpose, after performing field studies and collecting 50 soil specimens from 5 sites of the study area, geochemical tests (i.e., inductively coupled plasma mass spectrometry, atomic absorption spectroscopy and x-ray fluorescence) were conducted on the soil specimens collected from the 5 sites (named as Sites A1, A2, A3, A4 and A5) and the results were used to estimate the pollution indices (i.e., geo-accumulation index, normalized enrichment factor, contamination factor, and pollution load index). The obtained indices were utilized to assess the eco-toxicological risk level in the landfill site which indicated that the city has been severely contaminated by Cu, Mn, Ni, Pb and Zn. These levels have been developed along the stream towards the nearshore areas indicating uptake of soil degradation. The heavy metal contamination was classified to range from unpolluted to highly polluted, which indicated serious heavy metal pollution in the study area as related to municipal solid waste disposal in Tonekabon.

Distribution and Pollution of Heavy metals in Surface sediments from Nakdong River (낙동강 수계 표층 퇴적물의 중금속 분포와 오염도)

  • Kim, Shin;Kim, Jueon;Lee, Kwonchul;Lee, Kyuyeol;Jeon, Hyelyn;Yu, Jaejung;Lee, Injung;Ahn, Jungmin
    • Journal of Environmental Science International
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    • v.24 no.8
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    • pp.969-980
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    • 2015
  • In order to certificate the distribution and pollution of heavy metal of surface sediments in Nakdong River were collected and analyzed for grain size, water content, ignition loss and heavy metal content. Surface sediments mainly composed of sand(avg. 94.6%) and water content and ignition loss were 20.46%, 1.53% on average. Grain size were relatively fine and organic matter content were relatively high in the Hoichun and Sunakdonggang. Most of heavy metal content(Zn > Cr > Pb > Ni > Cu > Hg) in the Deokcheongang and Sunakdonggang were higher than the other streams. The Igeo were non polluted(less than 0) in all streams and the EF were relatively high in the small stream and PLI were non polluted(less than 1). In addition, organic matter, heavy metal content and pollution were highly correlation with grain size. Surface sediments in study area, heavy metal pollution of the Sunakdonggang were relatively high compared to the other stream but these results were not serious pollution that exceed the sediment pollution evaluation standard of river and lake in Korea and pollution levels adversely affected the majority of benthos were not.

Evaluation of Pollution Level for Organic Matter and Trace Metals in Sediments around Taehwa River Estuary, Ulsan (울산 태화강 하구역 퇴적물의 유기물 및 미량금속 오염도 평가)

  • Hwang, Dong-Woon;Lee, In-Seok;Choi, Minkyu;Kim, Chung-Sook;Kim, Hyung-Chul
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.48 no.4
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    • pp.542-554
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    • 2015
  • Grain size, the content of ignition loss (IL), and the concentrations of chemical oxygen demand (COD), acid volatile sulfide (AVS), and trace metals (Fe, Mn, Cu, Pb, Zn, Cd, Cr, As, and Hg) in surface sediments from the Taehwa River estuary, Ulsan, were measured to evaluate pollution levels and potential ecological risks of organic matter and trace metals in estuarine sediment. The mean grain size (Mz) of sediments in the study region ranged from $-0.8-7.7{\varphi}$ (mean $2.8{\pm}2.4{\varphi}$). Surface sediments in the upstream region of the Taehwa River were mainly composed of coarse sediments compared to the downstream region. The concentrations of IL, COD, AVS and trace metals in the sediment were much higher at downstream sites of Myeongchon Bridge in the vicinity of industrial complexes than at upstream sites of those in the vicinity of the residential areas due to the anthropogenic input of organic matter and trace metals by industrial activities. On the basis of several geochemical assessment techniques [sediment quality guidelines (SQGs), enrichment factor (EF), geoaccumulation index ($I_{geo}$), pollution load index (PLI) and ecological risk index (ERI)], the surfaces sediments in the study region are not highly polluted for trace metals, except for As. However, the higher concentrations in downstream study regions of the Taehwa River could impact benthic organisms including shellfish (i.e. Manila clam) in sediments.