Ad
related to: 100 year floodplain map
Search results
Results From The WOW.Com Content Network
For river systems, a 100-year flood is generally expressed as a flowrate. Based on the expected 100-year flood flow rate, the flood water level can be mapped as an area of inundation. The resulting floodplain map is referred to as the 100-year floodplain. Estimates of the 100-year flood flowrate and other streamflow statistics for any stream in ...
The term 100-year flood indicates that the area has a one-percent chance of flooding in any given year, not that a flood will occur every 100 years. [ 2 ] Such maps are used in town planning , in the insurance industry, and by individuals who want to avoid moving into a home at risk of flooding or to know how to protect their property.
The NFIP offers insurance to properties located within a flood-prone area, as defined by the Flood Insurance Rate Map (FIRM), which depicts various flood risks for a community. The FIRM typically focuses on the delineation of the 100-year flood inundation area, also known within the NFIP as the Special Flood Hazard Area.
More than 2.4 million people live or work in a 100-year floodplain — areas that have a 1% chance of flooding each year — according to the draft state flood plan.
New floodplain maps outline hundreds of homes across Davidson County that are eligible for flood insurance policies given their potential risk. Hundreds of Nashville homes added to 100-year ...
Theoretically a 100-year flood has a 1 percent chance (1/100 = 0.01 or 1 percent) of occurring in any given year and a 500-year flood has as a 0.2 percent chance (1/500 = 0.002 or 0.2 percent) of occurring in any given year. [12] However, these expected flood elevations actually occur more or less often than expected. [13]
For example, a 10-year flood has a 1/10 = 0.1 or 10% chance of being exceeded in any one year and a 50-year flood has a 0.02 or 2% chance of being exceeded in any one year. This does not mean that a 100-year flood will happen regularly every 100 years, or only once in 100 years. Despite the connotations of the name "return period". In any given ...
The level of water inundation surpassed that as listed on 100-year floodplain maps. [107] A state of emergency was immediately declared and I-5 was closed for 4 days after it was covered in 6 feet (1.8 m) of floodwater; [107] [105] further measurements listed the amount of flooding there to be 10 feet (3.0 m). [108]