ABSTRACT
This chapter describes the phase of the development, refinement, and application of a planning-level water balance model. In this case, the water budget components considered include: precipitation; snowmelt and rainfall runoff; evapotranspiration; and surficial and deeper groundwater recharge. The model discussed here has been applied to compute the effects of urbanization on the water balance in a high recharge area and to assess specific control measures for mitigating recharge reductions. The water components considered in this modeling approach include precipitation in the form of rainfall or snowfall, rainfall runoff, snowmelt, upper soil infiltration, evapotranspiration, groundwater recharge, and stormwater management practices input to groundwater as a way of controlling reductions in infiltration after development. The chapter summarizes some of the development features and provides results of an application of the Stormwater Management Practices Water Balance Model produced as an attempt to bridge the gap in the availability of suitable analysis tools.
