How to measure a flood
Floods are measured in flood stages. A flood stage is "An established gage height for a given location at which a rise in water surface level begins to create a hazard to lives, property, or commerce." In other words, a flood stage is the amount water in an area. The higher the water the more dangerous it can be.
Definition link: http://www.crh.nwww.crh.noaa.gov/Image/dmx/hydro/Definitions_FloodStage
_FloodSeverityCategories_DMX.pdfoaa.gov/Image/dmx/hydro/Definitions_FloodStage_FloodSeverityCategories
_DMX.pdf
_FloodSeverityCategories_DMX.pdfoaa.gov/Image/dmx/hydro/Definitions_FloodStage_FloodSeverityCategories
_DMX.pdf