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