ABSTRACT
This chapter discusses that the configuration for the Mayaguez Bay Drainage Basin model was developed using available data for soils, land use, digital elevation models and field measurements. This model will be used for uncertainty analysis, rainfall tests and posterior flood alarm predictions. The Green Ampt infiltration model is used by the distributed hydrological model to calculate the initial abstractions due to infiltration and runoff produced by rainfall. The parameters are derived from soil characteristics assigned to the Soil Survey Geographic Database soil classification maps, digitally available. Channel geometry in the hydrologic model is necessary for the channel cells or cross section cells in the model and includes the sides slopes, cross sectional data or base width for trapezoidal assumption and channel slope. The geometry would affect the flow response, increasing the stages for narrow rivers and decreasing stages for wide rivers, principally due to the storage.
