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Water 2017, 9(9), 643; doi:10.3390/w9090643

Enhanced Two Dimensional Hydrodynamic and Water Quality Model (CE-QUAL-W2) for Simulating Mercury Transport and Cycling in Water Bodies

State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
LimnoTech, Environmental Laboratory, Engineer Research and Development Center, Davis, CA 95616, USA
China Institute of Water Resources and Hydropower Research, Beijing 100038, China
Author to whom correspondence should be addressed.
Received: 21 July 2017 / Revised: 15 August 2017 / Accepted: 21 August 2017 / Published: 28 August 2017
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CE-QUAL-W2 (W2) is a widely-used two-dimensional, laterally averaged, longitudinal/vertical, hydrodynamic and water quality model. This model was modified and enhanced to include a mercury (Hg) simulation module for simulating Hg transport and cycling in water bodies. The Hg simulation module in W2 is able to model the physical and biochemical processes including adsorption and desorption of Hg species on multi-solids, settling and resuspension, sediment burial of adsorbed Hg, diffusive exchange between water column and sediment layer, volatilization, and biogeochemical transformations among Hg species. This paper describes the Hg simulation module, W2 model validation and its application to the Xiaxi River, China, a historical Hg contaminated water body. The W2 model was evaluated using the Xiaxi River data collected in 2007 and 2008. Model results show that W2 was able to predict the total Hg and methylmercury concentrations observed for the Xiaxi River. The Xiaxi River W2 model also provides a foundation for the future investigations of Hg contamination in the Xiaxi River. This application demonstrated the W2 model capability in predicting complex transport and cycling of Hg species in water bodies. View Full-Text
Keywords: CE-QUAL-W2; Mercury; Methylmercury; cycling; Mercury simulation module CE-QUAL-W2; Mercury; Methylmercury; cycling; Mercury simulation module

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhu, S.; Zhang, Z.; Liu, X. Enhanced Two Dimensional Hydrodynamic and Water Quality Model (CE-QUAL-W2) for Simulating Mercury Transport and Cycling in Water Bodies. Water 2017, 9, 643.

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