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Modeling and Evaluating Integrated Pollution Control Measures in Rivers: A Case Study of the Lianjiang River Basin
Jinxi Zheng1,2, Yongyou Hu1, Wenqin Xu3
1Key Laboratory of Pollution Control and Ecological Restoration in Industrial Clusters, Ministry of Education, College of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
Toxics
|March 27, 2026
Summary
Integrated river pollution control strategies effectively improved water quality in the Lianjiang River. A multi-source interception scenario significantly reduced chemical oxygen demand, ammonia nitrogen, and total phosphorus concentrations.
Area of Science:
- Environmental Science
- Water Resource Management
- River Ecology
Background:
- Urban rivers face severe pollution from industrialization and urbanization, threatening ecosystems and water security.
- The Lianjiang River's Puning section exhibits complex pollution from domestic sewage, industrial wastewater, and agricultural runoff.
- Existing water quality in the Puning section fails to meet Class V surface water standards, with high levels of COD, NH3-N, and TP.
Purpose of the Study:
- To systematically analyze and simulate water quality in the Puning section of the Lianjiang River.
- To evaluate the effectiveness of various pollution control scenarios for improving river water quality.
- To provide theoretical and technical support for integrated water environment management.
Main Methods:
- Establishment of a coupled hydrodynamic-water quality model for simulation.
- Proposal and evaluation of 22 distinct pollution control scenarios.
- Numerical simulation to assess pollutant concentration reductions under different scenarios.
Main Results:
- Most monitoring sections in the Puning segment did not meet Class V surface water quality standards.
- The multi-source interception scenario demonstrated superior pollutant reduction capabilities.
- This scenario achieved over 90% reduction in ammonia nitrogen and total phosphorus concentrations.
Conclusions:
- Integrated management strategies are crucial for basins with complex pollution sources.
- Wastewater treatment, source control, and ecological restoration effectively enhance water quality.
- Findings offer valuable insights for water quality management in the Lianjiang River Basin and similar regions.
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