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  5. Water Quality Analysis of In-stream and Reservoir Water in Erosion Control Dams in the Nakdong River Basin

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Article
English
2019

Water Quality Analysis of In-stream and Reservoir Water in Erosion Control Dams in the Nakdong River Basin

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English
2019
Journal of Korean Society of Forest Science
Vol 108 (3)
DOI: 10.14578/jkfs.2019.108.3.329

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Eunjai Lee
Eunjai Lee

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Qiwen Li
Song Eu
Eunjai Lee
+3 more

Abstract

불투과형 사방댐에 의한 수질오염 문제는 산림유역관리에 있어 매우 중요하지만, 이에 대한 신뢰할 수 있는 연구는 상대적으로 부족하다. 이 연구에서는 이를 위하여 낙동강유역 사방댐을 대상으로 계류수와 저류수의 수질을 조사하였으며, 수질 특성과 유역의 물리적 환경과의 상관관계를 분석하였다. 전체 43개의 조사대상 사방댐 중에서 농업용수 등급이하로 판정된 곳은 10%미만으로 나타나 전반적으로 수질은 양호하였다. 계류수 및 저류수에서 공통적으로 상관성이 높게 나타난 항목은 TOC와 산소요구량, SS와 탁도, SS와 Chl-a, Chl-a와 탁도 등이었다. 계류수에서 높은 상관성을 보인 항목들은 BOD와 SS, BOD와 Chl-a, BOD와 탁도, TOC와 Chl-a 등이었다. 이 연구의 결론은 사방댐 저류수의 수질이 대부분 양호하였고 저류수 수질이 유출수 수질에 다소 영향이 있지만 개별 수질항목에 국한된다는 것이다. Water pollution in erosion control dams is a major issue for forest watershed management, but the effects of erosion control dams on water quality remain poorly understood. In this study, water quality data from streams and dam reservoirs were collected over the Nakdong river basin. Monitored data were further analyzed to examine the relationship between watershed characteristics and water quality. Of the total 43 erosion control dams, less than 10% had lower water quality that was not suitable for agricultural use. TOC and oxygen demand, SS and turbidity, SS and Chl-a, and Chl-a and turbidity showed high correlations (p < 0.01) both in stream water and in detained water. BOD and SS, BOD and Chl-a, BOD and turbidity, and TOC and Chl-a showed high correlations only in stream water. Overall, the results demonstrated that for most erosion control dams the water quality was relatively good. In addition, the quality of downstream water is somewhat affected by the water detained by erosion control dams, in limited ways.

How to cite this publication

Qiwen Li, Song Eu, Eunjai Lee, Ye Eun Lee, Min‐Sik Kim, Sang Jun Im (2019). Water Quality Analysis of In-stream and Reservoir Water in Erosion Control Dams in the Nakdong River Basin. Journal of Korean Society of Forest Science, 108(3), pp. 329-340, DOI: 10.14578/jkfs.2019.108.3.329.

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Publication Details

Type

Article

Year

2019

Authors

6

Datasets

0

Total Files

0

Language

English

Journal

Journal of Korean Society of Forest Science

DOI

10.14578/jkfs.2019.108.3.329

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