ABSTRACT
The success of infiltration surfaces and basins in capturing, storing and infiltrating runoff at a given location depends on the relationship between their volumes and dimensions on the one hand, and the magnitude of precipitation and runoff inflow on the other. Each infiltration surface or basin must be sized for the flows anticipated to pass through it Sizing must neither result in underestimation of the required volume and floor area, so that excessive standing water and overflow will not ensue. Nor must it overestimate required capacity, so that land allocation and construction expense will not be wasted. Correct sizing involves the use of site-specific soil and watershed characteristics in calculations analogous to those for any other stormwater structure. The Minnesota Department of Transportation used a water balance to investigate the possibility of disposing of highway runoff in existing glacial kettle holes. Continuous simulation models are typically demanding of computing resources, but modern ones incorporate many refinements in hydrologie modeling.
