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Floods
Nearly all flood reports pertain to natural-basin flood investigations.
The reports document the largest floods in Texas, summarize annual
peak streamflow data, provide flood frequency estimates using updated
generalized skew estimates for flood-peak distributions, provide an
equation for identifying low outliers, provide statewide regional
equations as well as specific equations for flood frequency of small
basins, and provide a computer program implementing a new method (the
site-specific method) for estimation of flood frequency. The reports
describe several other new or modified analysis techniques developed
specifically for hydrologic characteristics of Texas.
The latest report documents the effects of regulation by reservoirs
on the L-moments of annual peak streamflows, provides a method to
determine if the regulation in a given basin will significantly
affect peak streamflows, and provides a method to estimate flood
frequency for marginally regulated basins. The theory of L-moments,
which currently is the state-of-the-art in environment frequency
analysis, is the statistical basis of the analysis.
Asquith, W.H., 1998, Peak-flow frequency and extreme flood potential
for tributaries of the Colorado River downstream of Austin, Texas:
U.S. Geological Survey Water-Resources Investigations Report 98-4015,
19 p.
______2001, Effects of regulation on L-moments of annual peak streamflow
in Texas: U.S. Geological Survey Water-Resources Investigations
Report 01-4243, 66 p.
Asquith, W.H., and Slade, R.M., Jr., 1995, Documented and potential
extreme peak discharges and relation between potential extreme peak
discharges and probable maximum flood peak discharges in Texas:
U.S. Geological Survey Water-Resources Investigations Report 95-4249,
58 p.
______1995, Flood frequency in Texas—Calculation of peak-streamflow
frequency at gaging stations: U.S. Geological Survey Fact Sheet
181-95, 2 p.
______1997, Regional equations for estimation of peak-streamflow
frequency for natural basins in Texas: U.S. Geological Survey Water-Resources
Investigations Report 96-4307, 68 p.
______1999, Site-specific estimation of peak-streamflow frequency
using generalized-least squares regression for natural basins in
Texas: U.S. Geological Survey Water-Resources Investigations Report
99-4172, 19 p.
Asquith, W.H., Slade, R.M., Jr., and Judd, L., 1995, Analysis of
low-outlier thresholds for log-Pearson Type III peak-streamflow
frequency analysis in Texas, in Texas Water '95 component
conference of American Society of Civil Engineers First International
Conference, San Antonio, Tex., 1995, Proceedings: San Antonio, Tex.,
American Society of Civil Engineers, p. 379-84.
Asquith, W.H., Slade, R.M., Jr., and Lanning-Rush, Jennifer, 1996,
Peak-flow frequency and extreme flood potential for streams in the
vicinity of the Highland Lakes, Central Texas: U.S. Geological Survey
Water-Resources Investigations Report 96-4072, 1 sheet.
Hejl, H.R., Slade, R.M., Jr., and Jennings, M.E., 1996, Floods
in Central Texas, December 1991: U.S. Geological Survey Water-Resources
Investigations Report 95-4289, 1 sheet.
Judd, L.J., Asquith, W.H., and Slade, R.M., Jr., 1996, Techniques
to estimate generalized skew coefficients of annual peak streamflow
for natural basins in Texas: U.S. Geological Survey Water-Resources
Investigations Report 96-4117, 28 p.
Liscum, Fred, and East, J.W., 1994, Floods in southeast Texas,
October 1994: U.S. Geological Survey Fact Sheet 94-073, 2 p.
Raines, T.H., 1998, Peak-discharge frequency and potential extreme
peak discharge for natural streams in the Brazos River Basin, Texas:
U.S. Geological Survey Water-Resources Investigations Report 98-4178,
42 p.
Raines, T.H., Asquith, W.H., and Brown, D.S., 1998, Floods in South-Central
Texas, June 1997: U.S. Geological Survey Fact Sheet 053-98, 6 p.
Slade, R.M., Jr., Asquith, W.H., and Tasker, G.D., 1995, Multiple-regression
equations to estimate peak-flow frequency for streams in Hays County,
Texas: U.S. Geological Survey Water-Resources Investigations Report
95-4019, 1 sheet.
Slade, R.M., Jr., and Asquith, W.H., 1996, Peak data for U.S. Geological
Survey gaging stations, Texas network; and computer program to estimate
peak-streamflow frequency: U.S. Geological Survey Open-File Report
96-148, 57 p.
Slade, R.M., Jr., and Persky, Kristie, 1999, Floods in the Guadalupe
and San Antonio River basins in Texas, October 1998: U.S. Geological
Survey Fact Sheet 147-99, 4 p.
Storm Rainfall
Reports involving storm rainfall document the largest storms (often
with resulting floods) in Texas, provide methods to estimate depth-duration
frequency of precipitation, and provide areal reduction factors
for the 1-day design storm in the Austin, Dallas, and Houston areas.
Asquith, W.H., 1998, Depth-duration frequency of precipitation
for Texas: U.S. Geological Survey Water-Resources Investigations
Report 98-4044, 107 p.
______1999, Areal-reduction factors for the precipitation of the
1-day design storm in Texas: U.S. Geological Survey Water-Resources
Investigations Report 99-4267, 81 p.
Asquith, W.H., and Famiglietti, J.S., 2000, Precipitation areal-reduction
factor estimation using an annual-maxima centered approach: Journal
of Hydrology, v. 230, p. 55-69.
Hejl, H.R., Slade, R.M., Jr., and Jennings, M.E., 1996, Floods
in Central Texas, December 1991: U.S. Geological Survey Water-Resources
Investigations Report 95-4289, 1 sheet.
Lanning-Rush, Jennifer, Asquith, W.H., and Slade, R.M., Jr., 1998,
Extreme precipitation depths for Texas, excluding the Trans-Pecos
region: U.S. Geological Survey Water-Resources Investigations Report
98-4099, 38 p.
Liscum, Fred, and East, J.W., 1994, Floods in southeast Texas,
October 1994: U.S. Geological Survey Fact Sheet 94-073, 2 p.
Raines, T.H., Asquith, W.H., and Brown, D.S., 1998, Floods in South-Central
Texas, June 1997: U.S. Geological Survey Fact Sheet 053-98, 6 p.
Slade, R.M., Jr., and Persky, Kristie, 1999, Floods in the Guadalupe
and San Antonio River Basins in Texas, October 1998: U.S. Geological
Survey Fact Sheet 147-99, 4 p.
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