X
GO

Water School

About Us   >   Education   >   Water School

Water School

What is a 500-year flood?

A 500-year flood is a high streamflow that overflows the natural or artificial banks of a waterway and has a two-tenths of 1% chance of occurring in any given year.

Tags

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