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Published on: December 9, 2012
[Simulation of nonpoint source pollution load in Maoping River watershed].
Qi-Gong Xu1, Hong-Liang Liu, Zhen-Yao Shen
1School of Environment, Beijing Normal University, Beijing 100875, China. xuqigong@tom.com
This study modeled nitrogen and phosphorus transport in the Maoping River watershed using the SWAT model. Results indicate significant nutrient loads entering the Yangtze River, highlighting nonpoint source pollution as a key factor in water quality decline.
Area of Science:
- Environmental science
- Hydrology
- Water quality modeling
Context:
- The Maoping River watershed faces water quality challenges.
- Nutrient transport significantly impacts aquatic ecosystems.
- Nonpoint source pollution is a major contributor to water degradation.
Purpose:
- To model nitrogen and phosphorus transport in the Maoping River watershed.
- To quantify nutrient loads entering the Yangtze River.
- To identify sources of water quality deterioration.
Summary:
- The Soil and Water Assessment Tool (SWAT) model was employed to simulate water and nutrient cycles.
- Model calibration and validation were performed using data from May to October 2004.
- Simulations revealed substantial nitrogen (102.5t) and phosphorus (9.46t) loads entering the Yangtze River.
Impact:
- The study quantifies nutrient pollution in a critical watershed.
- Findings underscore the role of nonpoint source pollution in degrading water quality.
- Results can inform targeted management strategies for watershed protection.
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