CFM EXAM QUESTIONS AND ANSWERS

Shallow flooding problems fall into (3) categories - Answer-Sheet flow, ponding, urban drainage, coastal flooding (depths 1-3 feet) Describe areas where ponding may be a problem - Answer-Glaciated areas, caves and sinkholes, man-made features What are (5) Special Flood Hazards - Answer-Closed basin lakes, uncertain flow paths, dam breaks, ice jams, mud flows Alluvial fan flooding is what type of special flood hazard and what are the inherent hazards thereof? - Answer-Uncertain flow path: (1) velocity and debris (2) sediment and debris deposition (3) potential for channel to move What is the NFIP definition of a mudslide - Answer-Liquid mud down a hillside resulting from loss of brush cover and subsequent accumulation of water on the ground Describe NFIP regulations for mudslides - Answer-Provides coverage in these areas but does not require mapping or management measures What is the estimate regarding the number of households that dwell in floodplains nationwide? - Answer-8-10 Million What are (2) problems that develop from development in floodplains. - Answer-(1) Alters floodplain and dynamic of flooding (2) building and infrastructure damage Regarding urbanization and watersheds what timing issue may persist in sub-watersheds? - Answer-Development of one sub-watershed faster than another one, lead to peak that will arrive to the main channel at the same time as the underdeveloped sub-watershed. Annually, floods kill how many people? - Answer-150, largely by vehicles (can float in up to 2 feet of water) Annually, what is the approximate property damage due to flooding - Answer-$6 Billion What are the (5) main causes of flood damage that one should be knowledgeable as a floodplain manager? - Answer-Hydrodynamic forces, hydro static forces, debris impacts, soakin