Trials and tribulations of two-dimensional modeling for the Nooksack River, Washington

ABSTRACT

Computer modeling has been the basis for mapping floodplains for many years. Until now, most detailed floodplain maps have been based on results produced by one-dimensional steady-state computer models. New, faster computers have made it possible to develop two-dimensional models for river floodplains that give much more detailed flooding information. The purpose of developing a two-dimensional model of the lower Nooksack River was to create a better set of tools for long-term flood hazard management in Whatcom County. In the past, flooding along the river has been extremely costly. Unfortunately, regulations based on the existing floodplain mapping allow development in potentially hazardous areas