An event-based hydrologic simulation model for bioretention systems

摘要: Bioretention systems are designed to treat stormwater and provide attenuated drainage between storms. has shown great potential at reducing the volume improving quality of stormwater. This study introduces bioretention hydrologic model (BHM), a one-dimensional that simulates response system over duration storm event. BHM is based on RECARGA model, but been adapted for improved accuracy integration pollutant transport models. contains four completely-mixed layers accounts evapotranspiration, overflow, exfiltration native soils underdrain discharge. Model results were evaluated against field data collected 10 events. Simulated flows particularly sensitive antecedent water content parameters soils, which calibrated through an optimisation algorithm. Temporal disparity was observed simulated measured flows, attributed preferential flow paths formed within soil matrix system. Modelling suggest storage most important short-term process in bioretention, with having be significant sufficient permeability.