By Isri R. Mangangka, An Liu, Ashantha Goonetilleke, Prasanna Egodawatta
This publication identifies the foremost hydrologic and hydraulic elements which effect the functionality of stormwater caliber remedy platforms akin to developed wetlands and bioretention basins. Mathematical relationships derived utilizing conceptual types underpinned via basic hydraulic concept are offered to foretell therapy functionality. the major highlights of the publication will comprise the id of the linkages among influential hydrologic and hydraulic elements for built wetlands and bioretention basins to help extra exact prediction of therapy functionality and powerful layout of those varieties of stormwater remedy structures. additionally, this e-book will show off an cutting edge technique for utilizing conceptual versions to research stormwater therapy procedure performance.
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Additional resources for Enhancing the Storm Water Treatment Performance of Constructed Wetlands and Bioretention Basins
The selection of hydrologic and hydraulic factors was undertaken by using PROMETHEE, which is a multi criteria decision making method (Khalil et al. 2004; Liu et al. 2015), and the Pearson correlation analysis. Detailed information regarding the PROMETHEE method and Pearson correlation analysis is provided in Appendix B. This selection was to prevent too many correlating parameters overshadowing critical relationships between hydrologic and hydraulic factors and treatment performance of the bioretention basin (Egodawatta et al.
4 Generating Hydraulic Factors from the Model The purpose of the wetland conceptual model was to generate the influential hydraulic factors for the analysis of water quality treatment performance. The selected influential hydraulic factors were outflow volume (OV), outflow average discharge (OQ), average water depth in the wetland (AD), average retention time (RT) and outflow peak (OP). The reasons for selecting these parameters are discussed below. OQ values represented the outflow characteristics, while OP was the maximum outflow discharge recorded during the runoff event.
1. • Step II: The cumulative pollutant load reduction for each sector of runoff volume was determined by the difference between cumulative pollutant loads at inlet and outlet for each 10 % sector in the plot. • Step III: The pollutant load reduction for each 10 % sector was obtained by the difference between the cumulative pollutant load reductions of two consecutive 10 % sectors. Accordingly, the resulting water quality section variables for each rainfall event included ten load reduction values for each pollutant species and section hydraulic parameters consisting of outflow average discharge (OQ), average water depth in the wetland (AD), average retention time (RT) and outflow peak (OP).