This section describes how watershed information is entered into the program using a Basin Model. The Basin Model is used for describing the physical properties of the watershed and the topology of the stream network. It will contain the modeling components that describe canopy interception, surface storage, infiltration, surface runoff, baseflow, channel routing, and lakes. It may additionally contain components for representing engineered structures such as diversions, reservoirs, and pump stations. It will generally be the focus of attention in performing simulations and viewing results. By creating multiple representations of the same watershed, different development scenarios or management alternatives can be evaluated.