Analysis of Scenarios for Environmental Instream Flow Considering Water Quality in Saemangeum Watershed

Kim, Se-Min; Park, Young-Ki; Won, Chan-Hee; Kim, Min-Hwan; Kim, Se-Min; Park, Young-Ki; Won, Chan-Hee; Kim, Min-Hwan

doi:2016.38.3.117

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(3); 2016 > Article

Original Paper

J Korean Soc Environ Eng 2016;38(3): 117-127. doi: https://doi.org/10.4491/KSEE.2016.38.3.117

새만금유역의 수질을 고려한 환경유지용수의 시나리오 분석

김세민¹, 박영기¹, 원찬희², 김민환³

¹전북대학교 토목공학과
²전북대학교 환경공학과
³호남대학교 토목환경공학과

Analysis of Scenarios for Environmental Instream Flow Considering Water Quality in Saemangeum Watershed

Se-Min Kim¹, Young-Ki Park¹, Chan-Hee Won², Min-Hwan Kim³

¹Department of Civil Engineering, Chonbuk National University
²Department of Environmental Engineering, Chonbuk National University
³Department of Civil & Environmental Engineering, Honam University

Corresponding author

Young-Ki Park ,Tel: 063-270-4790, Fax: 063-270-4056, Email: parkyk@jbnu.ac.kr

Received: December 30, 2015; Revised: January 11, 2016; Accepted: March 4, 2016. Published online: March 31, 2016.

ABSTRACT

In this study, analyzed scenarios of the environmental instream flow for water quality improvement in Saemangeum watershed. In order to get an environmental instream flow, Methodology is selected for Retention-Basin, reservoir expansion, new dam construction, Modification of water intake and drainage system, Rearrangement of plan for system which Yongdam and Seomjin river dam have been used water supply. The study composed of diverse scenario of Environmental instream flow increasement and analyzed the effect of improving the water quality by the QUAL2K model and calculation of runoff for saemangeum watershed by SWAT model. The following water quality indicators have been simulated in irrigation and non-irrigation period for BOD and T-P. When scenarios applied to water quality model, Improvement rate in the water quality for Total Maximum Daily loads of Mankyung B unit watershed during irrigation and non-irrigation period is BOD (28.70%), T-P (17.09%) and BOD (28.51%), T-P (28.68%) respectively. Dongjin A unit watershed during irrigation and non-irrigation period is BOD (14.39%), T-P (14.59%) and BOD (15.54%), T-P (19.46%) similary. Simulation results is to quantify the constribution of the improvement in the water quality. In particular, It was demonstrative that improving effect for water quality was evaluated to be great in non-irrigation period.

Key Words: Saemangeum Basin, Environmental Instream Flow, QUAL2K, SWAT, Water Quality Improvement