| Title |
Study on the Management of Doam Dam Operation by the Analysis of Suspended Solids Behavior in the lake |
| Authors |
염보민 ( Bo-min Yeom ) ; 이혜원 ( Hye Won Lee ) ; 문희일 ( Hee-il Moon ) ; 윤동구 ( Dong-gu Yun ) ; 최정현 ( Jung Hyun Choi ) |
| DOI |
https://doi.org/10.15681/KSWE.2019.35.6.470 |
| Keywords |
CE-QUAL-W2; Doam lake watershed; HSPF; In-lake management practices; Non-point sources control; Selective withdrawal |
| Abstract |
The Doam lake watershed was designated as a non-point pollution management area in 2007 to improve water quality based on watershed management implementation. There have been studies of non-point source reduction with respect to the watershed management impacting the pollutant transport of the reservoir. However, a little attention has been focused on the impact of water quality improvement by the management of the dam operation or the guidelines on the dam operation. In this study, the impact of in-lake management practices combined with watershed management is analyzed, and the appropriate guidelines on the operation of the dam are suggested. The integrated modeling system by coupling with the watershed model (HSPF) and reservoir water quality model (CE-QUAL-W2) was applied for analyzing the impact of water quality management practices. A scenario implemented with sedimentation basin and suspended matter barrier showed decrease in SS concentration up to 4.6%. The SS concentration increased in the scenarios adjusting withdrawal location from EL.673 m to the upper direction(EL.683 m and EL.688 m). The water quality was comparably high when the scenario implemented all in-lake practices with water intake at EL.673 m. However, there was improvement in water quality when the height of the water intake was moved to EL.688 m during the summer by preventing sediments inflow after the rainfall. Therefore, to manage water quality of the Doam lake, it is essential to control the water quality by modulating the height of water intake through consistent turbidity monitoring during rainfall. |