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J. E. Cummans

Publications and source records attributed to J. E. Cummans.

7 recordsLinked to original sources
USGS1981

Low-flow characteristics of streams in the Deschutes River basin, Washington

The purpose of the study was to determine the magnitude and frequency of low flows of streams in the Deschutes River basin. The streams in the basin usually have their low flows in August and September. Seven-day low flows were smallest in 1952 when annual rainfall at the Olympia airport was also the least during the 1945-75 period of continuous gaging-station records in the basin. The magnitude and frequency of seven-day low flows were estimated for 23 streamflow sites, either from frequency analysis of data at long-term stations or from correlation of measured or computed discharges at a stream flow site with data at a long-term station. Seven-day low flows ranged from no-flow at one tributary of Deschutes River having a drainage area of 1.85 square miles to 98 cubic feet per second for Deschutes River near its mouth, where the drainage was 162 square miles. Mean monthly flows were determined for two long-term stations and estimated for the months of July to September for the other streamflow sites. Miscellaneous streamflow measurements made over the years by the U.S. Geological Survey are listed in the Appendix.

Washington↗
USGS1976

Low-flow characteristics of streams on the Kitsap Peninsula and selected adjacent islands, Washington

Low-flow-frequency data are tabulated for 90 streamflow sites on the Kitsap Peninsula and adjacent islands, Washington. Also listed are data for 56 additional sites which have insufficient measurements for frequency analysis but which have been observed having no flow at least once during the low-flow period. The streams drain relatively small basins; only three streams have drainage areas greater than 20.0 square miles, and only nine other streams have drainage areas greater than 10.0 square miles. Mean annual precipitation during the period 1931-60 ranged from about 25 inches near Hansville to about 70 inches near Tahuya. Low-flow-frequency curves plotted from records of streamflow at eight long-term gaging stations were used to determine data for low-flow durations of 7, 30, 60, 90, and 183 days. Regression techniques then were used to estimate low flows with frequencies up to 20 years for stations with less than 10 years of record and for miscellaneous sites where discharge measurements have been made. (Woodard-USGS)

Open-File Report↗
USGS1974

Flood profiles and inundated areas along the Lower Nisqually River, Washington

Nisqually River flood profiles, covering the reach from near the river mouth to river mile 6.4, were developed in a 2-year field study (1970-72) as part of a continuing program with the State of Washington Department of Ecology. The main channel of the reach will convey without overflow discharges as large as about 21,000 cubic feet per second, which have a 6-year recurrence interval. The banks in some areas will be overtopped at 25,500 cubic feet per second, which has a 13-year recurrence interval. The areas where overbank flooding will first occur, and water-surface profiles of a 3.4-year and 100-year flood were determined for six flood-profile stations. The largest flood for which data are available was that of December 1933; the approximate area that would be presently inundated by such a flood is shown. Alder and La Grande Reservoirs can reduce the magnitude of lower annual flood peaks downstream to some extent, but insufficient data are available to predict their effects on very large floods.

Washington↗