Geology Reports⌕ Search

Geology topics

R. E. Curtis

Publications and source records attributed to R. E. Curtis.

9 recordsLinked to original sources
USGS1989

Water resources data, Puerto Rico and the U.S. Virgin Islands, water year 1987

Water-resources data for surface-water, quality-of-water, and ground-water records for the 1987 water year for Puerto Rico and the U.S Virgin Islands, consists of records of discharge, water quality of streams, and water levels of wells. This report contains discharge records for 49 streamflow-gaging stations, and 1 crest-stage, partial-record streamflow stations; water quality records-for 16 streamflow-gaging stations, 42 ungaged streamsites, 11 lake sites, 1 lagoon, and 1 bay; and water-level records for 56 observation wells. These data represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating local and federal agencies in Puerto Rico and the U.S. Virgin Islands.

Puerto Rico, U.S. Virgin Islands↗
USGS1989

Accuracy of acoustic velocity metering systems for measurement of low velocity in open channels

Acoustic velocity meter (AVM) accuracy depends on equipment limitations, the accuracy of acoustic-path length and angle determination, and the stability of the mean velocity to acoustic-path velocity relation. Equipment limitations depend on path length and angle, transducer frequency, timing oscillator frequency, and signal-detection scheme. Typically, the velocity error from this source is about +or-1 to +or-10 mms/sec. Error in acoustic-path angle or length will result in a proportional measurement bias. Typically, an angle error of one degree will result in a velocity error of 2%, and a path-length error of one meter in 100 meter will result in an error of 1%. Ray bending (signal refraction) depends on path length and density gradients present in the stream. Any deviation from a straight acoustic path between transducer will change the unique relation between path velocity and mean velocity. These deviations will then introduce error in the mean velocity computation. Typically, for a 200-meter path length, the resultant error is less than one percent, but for a 1,000 meter path length, the error can be greater than 10%. Recent laboratory and field tests have substantiated assumptions of equipment limitations. Tow-tank tests of an AVM system with a 4.69-meter path length yielded an average standard deviation error of 9.3 mms/sec, and the field tests of an AVM system with a 20.5-meter path length yielded an average standard deviation error of a 4 mms/sec. (USGS)

Water-Resources Investigations Report↗
USGS1984

Floods of April 18, 1983 on St. Thomas and St. John, U.S. Virgin Islands

The U.S. Virgin Islands of St. Thomas and St. John experienced the most intense rainfall event in recorded history on April 18, 1983. Rainfall intensities of 2.5 inches per hour, and more than 16 inches in 18 hours were recorded. Almost instantaneous runoff caused widespread flooding near the coastlines of both islands. Parts of Charlotte Amalie in St. Thomas were inundated with four feet or more of mud and flood water. Harry S. Truman Airport was flooded for two days with two to three feet of ponded water. On St. John, rural areas near Guinea Guy, Fish Bay, and Coral Bay were flooded.

Virgin Islands↗
USGS1973

Water resources data for Kansas, water year 1972; Part 1, Surface water records

Surface-water records for the 1972 water year for Kansas, including records of streamflow or reservoir storage at gaging stations and partial-record stations, are given in this report. The locations of the stations are on figures 1 and 2. Records for a few pertinent gaging stations in bordering States also are included. These data represent that part of the National Water Data System collected by the U. S. Geological Survey and cooperating State and Federal agencies in Kansas. The records were collected and computed by the Water Resources Division of the U. S. Geological Survey under the direction of C. W. Lane, district chief. Kansas district personnel who contributed significantly to the collection and preparation of data included in this report were: J. L. Ebling, C. 0. Geiger, K. D. Medina, L. E. Stuliken, C. 0. Peek, J. D. Craig, L. L. Jones, A. T. Klamm, J. P. Marshall, C. W. Kennedy, W. J. Carswell, D. L. Lacock, G. G. Quy II, J. T. Religa, R. D. Thomas, S. V. Bond, S. T. Green, C. G. Sauer, A. B. Evans, A. F. Browning, M. J. Goetz, M. L. Penny, and M. Pabst. Through September 30, 1960, the records of discharge and stage of streams and canals and contents and stage of lakes or reservoirs were published in an annual series of U. S. Geological Survey water-supply papers entitled "Surface Water Supply of the United States." Beginning with the 1961 water year, surface-water records have been released by the Geological Survey in annual reports on a State-boundary basis. Distribution of these reports is limited; they are designed primarily for rapid release of data shortly after the end of the water year to meet local needs. The discharge and reservoir storage records for 1961-65 also have been published in a Geological Survey water-supply paper series entitled "Surface Water Supply of the United States 1961-65."

Kansas↗