Sensitivity Analysis of Water Quality Modeling for Subsurface-Flow Constructed Wetlands
Date Issued
2011
Date
2011
Author(s)
Ho, How-Wei
Abstract
This study focuses on the sensitivity analysis of parameters in a water quality model for subsurface-flow constructed wetlands (Hsu, 2009). An one-way ANOVA of experimental data which is implemented to identify the difference in removal quality, and to decide the objects of sensitivity analysis. The model is built by AQUASIM 2.1 and the parameters are regressed by experimental data (Kuo, 2009). Absolute-relative sensitivity (SensAR) of BOD, DO, NO3--N and SS submodels can estimate the importance of each parameter or reaction. Therefore, the significant mechanisms in the constructed wetlands can be determined.
By the result of sensitivity analysis, biofilms adsorption have significant influence in most of removal of substance except SS which is mainly removed by filtration. The treatment efficiency in oyster-shell wetlands is better than the gravel-bed wetlands, because the oyster-shell can provide more habitat for microorganism growing.
Subjects
Subsurface-flow constructed wetlands
Water quality modeling
Sensitivity analysis
Biofilm
SDGs
Type
thesis
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