10.4122/1.1000001428
Mourad, M.
M.
Mourad
Bertrand-Krajewski, J. L.
J. L.
Bertrand-Krajewski
Chebbo, G.
G.
Chebbo
Design of a retention pond: comparison of stormwater quality models with various levels of complexity
DTU Library, Technical University of Denmark (DTU)
2005
Conference full text
Calibration
detention pond
experimental data
interception efficiency
sensitivity
urban drainage
URGC
Universit\303\251 Libanaise, Facult\303\251 De G\303\251nie
Facult\303\251 De G\303\251nie
Universit\303\251 Libanaise
2005
en
10.4122/1.1000001427
application/pdf
Stormwater quality simulation models are useful tools for the design and management of sewer systems. Modelling results can be sensitive to experimental data used for calibration. This sensitivity is examined for three modelling approaches of various complexities (site mean concentration approach, event mean concentration approach and build-up, washoff and transport modelling approach) applied to a dry detention pond design case study, accounting for the variability of calibration data and their effect on simulation results. Calibrated models with different calibration data sets were used to simulate three years of rainfall with different detention pond volumes. Annual pollutant load interception efficiencies were determined. Simulations results revealed i) that there is no advantage in using the EMC model compared to the SMC model and ii) that the BWT model resulted in higher design ratios than those given by the SMC/hydraulic approach. For both EMC and BWT models, using an increasing number n of events for calibration leads to narrower confidence intervals for the design ratios. It is crucial for design ratios to account for successive storm events in chronological order and to account for the maximum allowable flow to be transferred to the downstream WWTP.