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R.W. Clement

Publications and source records attributed to R.W. Clement.

5 recordsLinked to original sources
USGS1997

Hydraulic analysis of U.S. Highway 75 crossing of the Fall River at Neodesha, Southeast Kansas

A hydraulic analysis of the Fall River inthe vicinity of the existing U.S. Highway 75 crossing at Neodesha, southeast Kansas, was conducted using a combination of step-backwater (WSPRO) and culvert (CAP) analysis program. Hydraulic data for these programs were determined fromonsite inspections and surveys, and from previously conducted Flood Insurance Studies (FIS).Discharge values with their appropriate recurrence intervals also were obtained fromthe previous FIS. The computation of water-surface elevations using step-backwater and culvert analyses indicate that free flow occurs through all drainage structures for all discharges equal to or less than those having a 100-year recurrence interval (400,000 cubic feet per second_ an the water-surface elevations are lower than the lowest point on the roadway. The total capacity of the three drainage-structure openings is sufficient at the 500-year recurrence- interval discharge (55,000 cubic feet per second) to prevent flow over the roadway. Flow over the roadway begins when total discharge exceeds about 58,000 cubic feet per second.

Open-File Report↗
USGS1987

Floods in Kansas and techniques for estimating their magnitude and frequency on unregulated streams

Techniques are presented for generalizing the skewness coefficient of log-Pearson Type III distributions of annual maximum discharges and for flood magnitudes that have selected recurrence intervals from 2 to 100 yr. A weighted least-square (WLS) regression model was used to generalize the coefficients of station skewness that resulted in a root-mean-sq error of prediction of 0.35 compared to 0.55 for the skewness map published in Bulletin 17B of the U.S. Water Resources Council. Estimates of generalized skewness were computed for each of 245 streamflow gaging stations with a minimum of 10 years of record and a contributing drainage area of < 20,000 sq mi. The WLS regression model also was used to develop equations for estimating flood magnitude for selected recurrence intervals for ungaged stream locations by using data from 218 of the 245 streamflow gaging stations that had contributing-drainage areas of less than 10,000 sq mi. The errors of prediction of the most reliable WLS equations ranged from 28 to 42%. The WLS equations were compared statistically to previous developed equations and were determined to be different and more accurate than previously published equations. Flood magnitudes and frequencies for 245 streamflow gaging stations, based on data collected through the 1983 water year, are presented along with a summary of the seasonal distribution of annual maximum discharges and an analysis of the maximum observed discharges. (Author 's abstract)

Water-Resources Investigations Report↗
USGS1983

Improvement of flood-frequency estimates for selected small watersheds in eastern Kansas using a rainfall-runoff model

The U.S. Geological Survey rainfall-runoff model was used to estimate model parameters for 13 small watersheds in eastern Kansas with drainage areas of less than 11 square miles. Model parameters and rainfall data from three long-term rainfall stations were used in the model to synthesize long-term records of simulated annual peak discharge, which were fitted to a log-Pearson Type III distribution. Final estimates of T-year floods, which were computed by combining weighted estimates of the synthesized and observed T-floods, represent the most reliable estimates based on observed and long-term synthesized records of peak discharges. (USGS)

Water-Resources Investigations Report↗
USGS1982

Flood of June 15, 1981, in Great Bend and vicinity, central Kansas

Torrential precipitation, as much as 20 inches in 12 hours, resulted in unprecedented flooding on Dry Walnut Creek in southwestern Barton County, central Kansas. Runoff from the storm caused extensive flooding in the town of Great Bend on June 15, 1981. Estimates of total damages exceeded $42 million. Measurements of peak discharges made in the downstream part of the Dry Walnut Creek watershed were as much as 3 1/2 times the estimated magnitude of the 100-year flood and in some locations exceeded the maximum previously measured discharge for the area. (USGS)

Water-Resources Investigations Report↗