Evaluation of the Seasonal Characteristics of Sediments and Suspended Sediments in the Upstream of the Andong Dam

Jeong Wook Kim; Bum Lee Si; Hangu Ji; Hyowon Lee; Myung Chae Jung; Haejun Heo; Hyeonjoong Kim

doi:10.32390/ksmer.2023.60.2.065

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2023 Vol.60, Issue 2 Next Page

Research Paper

Evaluation of the Seasonal Characteristics of Sediments and Suspended Sediments in the Upstream of the Andong Dam 안동댐 상류 하천 퇴적물과 부유사의 계절적 변화 특성 평가

30 April 2023. pp. 65-77

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Abstract

This study evaluated the environmental impact of As and heavy metals occurring upstream of the Andong dam. In sediments, the concentrations of heavy metals were found to be higher in the dry season than in the wet season, with the highest concentration occurring near the smelter. Moreover, As concentrations in some tributaries, such as Songjeongricheon, Golpocheon, and Gacheon, were higher than those in the Nakdong River. The concentrations of heavy metals in water samples did not exceed the Korean environmental standards. However, some tributaries showed relatively high As concentrations in the dry season. In suspended sediments, As and heavy metals were detected in the wet season, and particulate transport was identified as their major dispersion mechanism. In conclusion, the abandoned metal mines, smelter, and deposited-tailings were the source of the pollutants, which accumulated on the river bed in the dry season and were carried into the Andong dam in the wet season, via streams.

Keywords

Upstream of the Andong dam

Sediment

Suspended sediment

Arsenic and heavy metals

이 연구에서는 안동댐 상류 지역 하천 퇴적물, 하천수 및 부유사 등을 건기와 우기로 구분하여 오염도 분석 및 평가를 수행하였다. 하천 퇴적물 분석결과, Cd, Cu, Pb 및 Zn은 우기보다 건기에 높은 농도를 보이고 있고, 석포제련소 주변에서 가장 높게 검출되었으며, 하류로 내려가면서 감소하는 경향을 보이고 있다. As의 경우, 낙동강 본류보다 송정리천, 골포천 및 가천 등의 지류에서 높게 검출되었으며, 일부 배경시료에서도 높은 함량을 보이고 있다. 하천수의 경우, 환경기준을 초과하는 항목은 없으나 일부 지류에서 As(건기)가 상대적으로 높은 함량을 보이고 있다. 우기에 채취한 부유사에서 As 및 중금속 농도가 확인되었으며, 강우 시 용존상 물질보다 입자상 물질 이동이 주요 오염 확산 원인으로 확인되었다. 이러한 결과는 유량이 작고 유속이 느린 건기에 폐금속광산, 석포제련소 및 퇴적 광물찌꺼기 등에서 유래한 입자상 오염물질이 하천 바닥에 퇴적되어 수생태계에 영향을 미칠 가능성이 높은 상태로 존재하다가 강우에 의해 부유되어 하류로 이동하여 최종적으로 안동댐으로 유입되는 것으로 해석된다.

키워드

안동댐 상류

하천 퇴적물

부유사

비소 및 중금속

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Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 60
No :2
Pages :65-77
Received Date : 2023-03-09
Revised Date : 2023-03-21
Accepted Date : 2023-04-21
DOI :https://doi.org/10.32390/ksmer.2023.60.2.065

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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