Abstract

Floodplain Mapping using UAS Technology
Track: Tribal/Indigenous Programs
Authors: Nadine Clah, Dave Turk

NHA recently conducted a complex detailed floodplain study which involved an alluvial fan and extremely flat terrain. The solution included collecting detailed terrain data using an unmanned aircraft system (UAS) and Esri software to map multi-branched floodplains using two-dimensional engineering modeling. The results were used by NHA to support their decision to rehabilitate homes that were not in the floodplain and to mitigate homes from flood hazards that were inside the floodplain.