Stormflow against streamflow – Can LID-provided storage capacity ensure performance efficiency and maintenance of pre-development flow regime?

•The need for cost-efficient stormwater management designs is high.•Dynamic storage assessment of designs can quantify storage recovery rate.•Both storage capacity and capture ratio are important for cost efficiency.•Infiltration must be added to piped stormflow when compared to streamflow.•Comprehensive model simulations can help designers in identifying key LID units.