Modelling water quality improvements in a south Korean inter-basin water transfer system

Hye Won Lee, Bo Min Yeom, Jung Hyun Choi

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In this study, we investigated the feasibility of using constructed wetlands for non-point source pollution reduction. The effect of constructed wetlands in reducing suspended solids (SS) was analyzed using an integrated modeling system of watershed model (HSPF), reservoir model (CE-QUAL-W2), and stream model (EFDC) to investigate the behavior and accumulation of the pollution sources based on 2017 water quality data. The constructed wetlands significantly reduced the SS concentration by approximately 30%, and the other in-lake management practices (e.g., artificial floating islands and sedimentation basins) contributed an additional decrease of approximately 7%. Selective withdrawal decreased in the average SS concentration in the influents by ~10%; however, the effluents passing through the constructed wetlands showed only a slight difference of 1.9% in the average SS concentration. In order to meet the water quality standards, it was necessary to combine the constructed wetlands, in-lake water quality management, and selective withdrawal practices. Hence, it was determined that the model proposed herein is useful for estimating the quantitative effects of water quality management practices such as constructed wetlands, which provided practical guidelines for the application of further water quality management policies.

Original languageEnglish
Article number3173
Pages (from-to)1-15
Number of pages15
JournalWater (Switzerland)
Volume12
Issue number11
DOIs
StatePublished - Nov 2020

Keywords

  • CE-QUAL-W2
  • Constructed wetlands
  • Doam Lake watershed
  • EFDC
  • HSPF
  • Non-point source pollution control
  • Selective withdrawal

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