“…It estimates the amount and flow of stormwater that percolates throughout the soil, evapo(transpi)rates, accumulates into BMP and finally flows into the downstream reaching mandatory or voluntary hydraulic objectives. This paper summarizes the development of the modelling, evaluation, and optimization processes already developed by Romnée et al [9]. The paper focuses, on one part, on the processes of selection and design of BMP actives in QUADEAU, and on other part, on the hydrological efficiency evaluation process that operates in the tool.…”