New methods and tools for estimating flood frequency
statistics in Alaska
Techniques and equations for estimating flood frequency in Alaska
have been updated in 2016! There are also new methods and tools
for estimating flood frequency at gaged sites throughout the nation.
Instructor: Janet Curran, USGS Alaska Science
Center, Anchorage, AK
Note: This workshop is sponsored by the AWRA - Alaska Section.
Please visit their registration page above to sign up for this trip.
April 24, 2016
Number of students: 5-35
Cost: $95/person (Register)
Background: The workshop will introduce concepts of frequency
at gaged rivers and streams throughout the nation and provide hands-on
training in methods for estimating flood frequency flows at gaged
and ungaged streams in Alaska that are described in a new USGS report
(Curran and others, 2016). Recently revised methods include EMA
techniques for flood frequency analysis, which are replacing Bulletin
17B techniques, and new regional skew and regression equations for
streams in Alaska and conterminous basins in Canada. Recently released
tools include an updated version of PeakFQ, an application tool
published with the new USGS report, and the new StreamStats application
available for the Cook Inlet Basin.
Attendee Requirements: Workshop participants should bring
a Windows device pre-loaded with the free USGS PeakFQ software,
available from http://water.usgs.gov/software/PeakFQ/.
Contact: Robin Beebee;
or Janet Curran
Schedule (subject to change):
||Introductions, course goals, overview of flood
frequency concepts and methods
||EMA analysis, nonstandard data, regional skew
||Station estimates of flood frequency for gaged
streams - PeakFQ exercises
||Overview of regional analysis, basin characteristics
||Overview of new regression equations for Alaska
Regression estimates for gaged and ungaged streams - Exercises
Weighting station and regression estimates - Exercises
||Using StreamStats for flood frequency estimates
within Cook Inlet Basin - Exercises
||Accuracy and limitations, special applications,