Puls method for events simulation in a lot scale bioretention device

Abstract

Bioretention is a technique applied to treat and reduce runoff generated in urban areas. Although these facilities present complex processes, a simple model with few parameters can be useful for its project. This paper reports an application of Puls method as a bioretention simulation quantitative tool for events. A bioretention device in real scale was installed and monitored using four level sensors and a tipping-bucket rain gauge, both with data loggers. The method was applied in two ways: the facility as a single reservoir; and the facility as two serial reservoirs. Outflows depended on a single infiltration rate in the first case (K) and two infiltration rates in the second case (K1 and K2). The study used 15 events. Results showed suitable values for Nash-Sutcliffe (NS) and determination coefficients (R2) in the calibration phase, especially for bioretention simulated as a single reservoir, with NS values ranging from 0.64 to 0.95. NS ranged from 0.80 to 0.95 in the calibration phase for the device simulated as two serial reservoirs. The validation phase achieved lower NS and R2 than calibration phase. Despite this, the present study suggests the Puls model as a good option for research on bioretention devices modelling.

Hydrologic and water quality modelling of bioretention columns in cold regions

“…The overall fitness is promising for outflow and ponding hydrographs, even though the R 2 value decreases from the 1:2 year storm event to the larger (1:5 and 1:10 year) events (the R 2 values are comparable for the 1:5 and 1:10 year events; see Table 5). The decreasing trend of R 2 values with larger storms can also be found in other hydrologic modelling studies (e.g., Ferreira et al, 2019). From the modelling perspective, this trend is understandable, because the 1:2 year event is for model calibration and the other two events are for model validation, and it is expected that R 2 values are higher in model calibration than validation.…”

“…Column 2 had a simulated peak ponding depth of 9.9 cm, which was larger than the observed peak ponding depth of 5.4 cm, and the ponding duration The overall fitness is promising for outflow and ponding hydrographs, even though the R 2 value decreases from the 1:2 year storm event to the larger (1:5 and 1:10 year) events (the R 2 values are comparable for the 1:5 and 1:10 year events; see Table 5). The decreasing trend of R 2 values with larger storms can also be found in other hydrologic modelling studies (e.g., Ferreira et al, 2019). From the T A B L E 2 Sensitivity test of hydraulic parameters, using Column 1 as an example.…”

Water Dynamics in an Infiltration Trench in an Urban Centre in Brazil: Monitoring and Modelling

“…The Puls method has already been used in studies developed by Kou et al [37], to design an infiltration trench; by Ohnuma et al [23], to model an infiltration trench; by Lucas et al [27] and Tecedor et al [29], to model a large-scale infiltration trench system at the University of São Paulo; in addition to Ferreira et al [38], who used the Puls method to simulate the behaviour of a bioretention device.…”