Download - FNR 66 Lecture 19
FNR 66 Lecture 19
• Don’t forget to review two discussions!!! I have only received a few assignments. Don’t wait until the last minute.
• Flood Hazard Lab, woot woot, just in time for the rainy season
GIS UPDATES? A MOMENT OF SILENCE WHILE YOU COLLECT YOUR THOUGHTS
http://www.fema.gov/media-library/assets/documents/15477?id=3574
http://pinalcountyaz.gov/DEPARTMENTS/PUBLICWORKS/FLOODCONTROLDISTRICT/FLOODPLAIN/Pages/FloodplainTerms.aspx
What is a Base Flood Elevation (BFE)?Base Flood Elevations are the high water marks for the 100 yr flood. This is the means by which we set the home’s lowest floor or bottom of frame if it is a manufactured home in order to give it maximum protection from flooding. This number is a limiting factor for floodplain building—do not go below the BFE. The Regulatory Flood Elevation, or RFE is one foot above the BFE to further protect from flooding.
Recurrence interval, in years
Probability of occurrence in any given year
Percent chance of occurrence in any given
year100 1 in 100 150 1 in 50 225 1 in 25 410 1 in 10 105 1 in 5 202 1 in 2 50
Recurrence intervals and probabilities of occurences
http://en.wikipedia.org/wiki/100-year_flood
http://water.usgs.gov/edu/100yearflood.html
http://pubs.usgs.gov/gip/106/
http://parra.sdsu.edu/roberson_chapter09.html
http://www.accurate-technologies.com/land/fema-flood-elevations-and-surveys.php
USGS General Information Product 106
LeDoux-Bloom, Cynthia and Downie, S.T. 2008 Outlet Creek Basin Assessment Report. Coastal Watershed Planning and Assessment Program, p. 191. California Department of Fish & Game, Sacramento, California.
https://msc.fema.gov/webapp/wcs/stores/servlet/StoreCatalogDisplay?storeId=10001&catalogId=10001&
https://hazards.fema.gov/femaportal/NFHL/