Water Quality Analysis in Nakdong River Tributaries for the Determination of Priority Management Areas

Im, Tae Hyo; Na, Seungmin; Shin, Sangmin; Son, Younggyu; Im, Tae Hyo; Na, Seungmin; Shin, Sangmin; Son, Younggyu

doi:2016.38.10.558

The Korean text of this paper can be translated into multiple languages on the website of http://jksee.or.kr through Google Translator.

J Korean Soc Environ Eng > Volume 38(10); 2016 > Article

Original Paper

J Korean Soc Environ Eng 2016;38(10): 558-565. doi: https://doi.org/10.4491/KSEE.2016.38.10.558

관리 우선순위 선정을 위한 낙동강 지류․지천 지점의 수질 오염 특성 분석

임태효¹, 나승민¹, 신상민¹, 손영규²

¹국립환경과학원 낙동강물환경연구소
²금오공과대학교 환경공학과

Water Quality Analysis in Nakdong River Tributaries for the Determination of Priority Management Areas

Tae Hyo Im¹, Seungmin Na¹, Sangmin Shin¹, Younggyu Son²

¹Nakdong River Environment Research Center, National Institute of Environmental Research
²Department of Environmental Engineering, Kumoh National Institute of Technology

Corresponding author

Younggyu Son ,Tel: 054-478-7637, Fax: 054-478-7859, Email: yson@kumoh.ac.kr

Received: September 22, 2016; Revised: October 13, 2016; Accepted: October 19, 2016. Published online: October 31, 2016.

ABSTRACT

Water quality data including flow rates and BOD/COD/T-N/T-P/SS/TOC concentrations in Nakdong river tributaries were analyzed to determine priority management areas using 699 data sets from 195 locations in 2015. It was pointed out that the coefficients of variation, the ratio of the standard deviation to the mean, for the concentrations and loading rates of BOD, T-P, and TOC in each monitoring location were so large that average values of water quality monitoring data might be not appropriate to determine the priority management areas among all 195 monitoring stations in Nakdoing river. Therefore we suggested two evaluation methods using each water quality data independently. In the first method the excess numbers of the BOD, T-P, and TOC concentrations comparing to the water quality standards in the medium-sized management areas in Nakdong river was evaluated for each monitoring station. In the second method the percentile ranks of the loading rates of the BOD, T-P, and TOC were obtained for each monitoring data. The two groups of the priority management areas determined by each method were compared and the water quality characteristics in Nakdoing river were investigated.

Key Words: Nakdoing River, Water Quality, Tributaries, Priority Management Areas, Coefficient of Variation