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Published on: December 9, 2012
Developing a flow control strategy to reduce nutrient load in a reclaimed multi-reservoir system using a 2D
Yongeun Park1, Kyung Hwa Cho, Joo-Hyon Kang
1School of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, South Korea.
The Science of the Total Environment
|August 27, 2013
Summary
Artificial dykes in estuarine systems cause water quality issues. This study optimized dam operations to reduce nutrient loads, decreasing total nitrogen by 27.2% and total phosphorus by 6.6%.
Area of Science:
- Environmental Science
- Water Resource Management
- Eutrophication Studies
Background:
- Artificial dykes disrupt natural estuarine flow, leading to water quality degradation.
- A triple-reservoir system in South Korea experiences pollutant accumulation and discharge.
- Effective dam operation is crucial for mitigating nutrient loads in integrated reservoirs.
Purpose of the Study:
- To develop an effective dam operation plan for reducing nutrient loads from an integrated reservoir system.
- To analyze the impact of interconnecting channel flow scenarios on pollutant discharge.
- To establish operational strategies for multi-reservoir systems to improve water quality.
Main Methods:
- Application of the CE-QUAL-W2 model, a 2D hydrodynamic and water quality model.
- Model calibration using sensitivity analysis and pattern search optimization.
- Scenario analysis of different flow control strategies for interconnecting channels.
Main Results:
- Optimal channel flow scenarios reduced total nitrogen (TN) by 27.2% and total phosphorus (TP) by 6.6%.
- Regulating chlorophyll-a concentration was key to reducing nutrient loads.
- Effective dam operation demonstrated a significant decrease in pollutant discharge.
Conclusions:
- Optimized dam operations can effectively reduce nutrient loads in integrated reservoir systems.
- This study provides practical strategies for managing multi-reservoir systems to protect receiving water bodies.
- Implementing these operational strategies can mitigate water quality problems caused by artificial impoundments.
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