Comparisons of estimates of annual exceedance-probability discharges for small drainage basins in Iowa, based on data through water year 2013.
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2015
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Abstract:Traditionally, the Iowa Department of Transportation
has used the Iowa Runoff Chart and single-variable regional-regression equations (RREs) from a U.S. Geological Survey
report (published in 1987) as the primary methods to estimate
annual exceedance-probability discharge (AEPD) for small
(20 square miles or less) drainage basins in Iowa. With the
publication of new multi- and single-variable RREs by the
U.S. Geological Survey (published in 2013), the Iowa Department of Transportation needs to determine which methods of
AEPD estimation provide the best accuracy and the least bias
for small drainage basins in Iowa. In response to this need,
the U.S. Geological Survey, in cooperation with the Iowa
Department of Transportation and the Iowa Highway Research
Board, initiated a statewide study in 2014 to compare and
evaluate AEPD estimates from five different AEPD-estimation
methods.
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Alternate URL:http://ntl.bts.gov/lib/55000/55600/55671/sir2015-5055_table09.xlsx ; http://ntl.bts.gov/lib/55000/55600/55671/sir2015-5055_table10.xlsx ; http://ntl.bts.gov/lib/55000/55600/55671/sir2015-5055_table08.xlsx ; http://ntl.bts.gov/lib/55000/55600/55671/sir2015-5055_table04.xlsx ; http://ntl.bts.gov/lib/55000/55600/55671/sir2015-5055_table03.xlsx ;
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