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http://dx.doi.org/10.15681/KSWE.2018.34.5.494

The Distribution Characteristics of Organic Matters in the Contaminated Tributaries of Han River Region  

Kim, Ho-Sub (Korea Environmental Consulting)
Park, Yun-Hee (Korea Environmental Consulting)
Kim, Yong-Sam (Korea Environmental Consulting)
Kim, Sang-Yong (Korea Environmental Consulting)
Publication Information
Journal of Korean Society on Water Environment / v.34, no.5, 2018 , pp. 494-502 More about this Journal
Abstract
The purpose of this study was to understand distribution characteristics of organic matters through concentration of $BOD_5$, $COD_{Mn}$ and TOC in 31 streams in Han River region, and to establish the relationship among organic matter concentration, and discharge load and flow rate. Concentration of $BOD_5$ and TOC in 22 streams were above IV grade except 9, and the average 80.9 % of total organic matter (by TOC) accounted for dissolved organic type. Correlation among organic matter parameters were higher ($r^2$ > 0.78) and the relationship between TOC and $COD_{Mn}$ concentration was higher than $BOD_5$. Ratio of biodegradable organic matter/total organic matter in the 31 streams was estimated at 41.4 % with $BOD_5$ oxidation rate, and 78.0 % with $BOD_5/COD_{Mn}$ concentration ratio. Ratio of $NBOD/BOD_5$ concentration in four sites with $BOD_5/COD_{Mn}$ concentration ratio exceeding 1 ranged from 54.5 % ~ 79.3 %. Among 979 flow rate data measured at 31 streams, 87 % of measured data was below 0.1 cms and increased water pollution under low flow conditions. Correlation between $BOD_5$ concentration and $BOD_5$ discharge load in the watershed was low, and it was revealed that several streams have more $BOD_5$ delivery load than $BOD_5$ discharge load. Results suggest that many biodegradable forms of organic matter are being introduced into the stream from pollutant sources in the watershed.
Keywords
Biodegradable organic matter; $BOD_5$ oxidation rate; Delivery load; Discharge load; Flow rate;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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