X
GO

Water School

About Us   >   Education   >   Water School

Water School

What is a 100-year flood?

A 100-year flood is a flood event that it has a 1 percent chance of happening in any given year. The term “100-year” is a measure of a flood’s size, not how often it occurs. Although statistically unlikely, several 100-year floods can occur within the same year or a few short years. It is also called the base flood.

Tags

flood, streamflow

Related

Share

Search
Categories

The information provided on this site is intended as background on water within the Brazos River basin. There should be no expectation that this information is all encompassing, complete or in any way examines every aspect of this very complex natural resource.

If you have questions about a post or would like additional information, please contact us or call 888-922-6272.

Tags
authority golden algae water quality camping streamflow water supply smell mitigation wastewater clarity drilling subsidence district sewage turbidity gate releases gulf anaerobic hydrologic cycle farming flood control lake inundated salinity chlorine bottled water mgd taste medicine spring permit minerals chlorides ground water water treatment tributary hydropower acre-feet emergency use cfs mission basin map Board drought runoff main stem gas impound habitat water planning contaminants estuary potable USGS biosolids beneficial use appropriation effluent flood consumption drinking water algae parasite agriculture golden algea oxygen lake conservation surface water bed and banks hydrology pollutants measure organic channel marsh corps of engineers stream sludge rain maps aerobic E coli indirect re-use supply governance legislation aquifer employment salt E. coli dissolved solids gage septic system insurance planning water rights PAM well reservoir calcium hunting streamflow industry allens creek reservoir environmental riparian groundwater lakes pharmaceuticals TCEQ lake levels inland precipitation industrial hydrilla classification rights evaporation electricity filter jobs water cycle sediment soil water reservoirs canoe contract infection brackish subwatershed mainstem lawn direct re-use septic costs riverine spillway watershed wetlands watercourse storage subsidence sanitation xeriscape bay system corps municipal monitor possum kingdom kayak water use boating fishing granbury lake level water plants volume fork water clarity treatment wetland speaker fertilizer electric companies quality recreation climate use environment water code dam invasive plants river depth limestone canoeing fish kill meta tag solids acre-foot agricultural landscaping wildlife dock flood pool