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D. W. Hubbell

Publications and source records attributed to D. W. Hubbell.

9 recordsLinked to original sources
USGS1986

Computer programs for computing particle-size statistics of fluvial sediments

Two versions of computer programs for inputing data and computing particle-size statistics of fluvial sediments are presented. The FORTRAN 77 language versions are for use on the Prime computer, and the BASIC language versions are for use on microcomputers. The size-statistics program compute Inman, Trask , and Folk statistical parameters from phi values and sizes determined for 10 specified percent-finer values from inputed size and percent-finer data. The program also determines the percentage gravel, sand, silt, and clay, and the Meyer-Peter effective diameter. Documentation and listings for both versions of the programs are included. (Author 's abstract)

Water-Resources Investigations Report↗
USGS1966

A sampler for coring sediments in rivers and estuaries

A portable sampler developed to core submerged unconsolidated sediments collects cores that are 180 cm long and 4.75cm in diameter. The sampler is used from a 12-m boat in water depths up to 20 m and in flow velocities up to 1.5m per second to sample river and estuarine deposits ranging from silty clay to medium sand. Even in sand that cannot be penetrated with conventional corers, the sampler achieves easy penetration through the combined application of vibration, suction, and axial force. A piston in the core barrel creates suction, and the suspension system is arranged so that tension on the support cable produces both a downward force on the core barrel and a lateral support against overturning. Samples are usually retained because of slight compaction in the driving head; as a precaution, however, the bottom of the core barrel is covered by a plate that closes after the barrel is withdrawn from the bed. Tests show that sample-retainers placed within the driving head restrict penetration and limit core lengths. Stratification within cores is disrupted little as a result of the sampling process.

Geological Society of America Bulletin↗
USGS1956

Progress report number 1: investigations of some sedimentation characteristics of a sand-bed stream

Several important aspects of sediment transport have been investigated by utilizing data from the turbulence flume in the Middle Loup River at Dunning, Nebr. These data have also been used to evaluate sedimentation formulas. However, additional work of a research nature is needed to provide information on specific transport phenomena and on field procedures. On August 26, 1955, representatives of the U.S. Bureau of Reclamation and U.S. Geological Survey met in Denver, Colo., to discuss these needs and the sediment investigations to be made at the Middle Loup River at Dunning, Nebr., during 1956.

Open-File Report↗