Geology topics
J. V. Skinner
Publications and source records attributed to J. V. Skinner.
Progress report on temperature effects in vibrational-type sediment-concentration gages
No abstract available.
Characteristics and use of Helley-Smith type bedload samplers
Explore the source record for details and available documents.
Measurement of scour-depth near bridge piers
River-bed scour is a major source of damage to bridge piers and bridge abutments. When scour depth exceeds design limits, the supporting material around the footings is washed away and the structure becomes unstable. Equations for predicting scour-depth show a significant lack of agreement so portable equipment for measuring scour is needed. This report discusses the design of an instrumented, unmanned boat that (a) can be launched and controlled from a bridge and (b) can be maneuvered in flood flows that reach velocities of 15 feet per second. Calculations indicate the battery-powered propulsive system alone will weigh about 300 pounds and that the craft must be about 15-feet long. Because a free-running craft will be undesirably heavy and large, other methods of obtaining scour data are proposed. A tethered craft fitted with a controllable rudder and some methods of measuring scour at a point are presented for future study and development.
Measuring the surface area of sediment particles in measurement and analysis of sediment loads in streams
No abstract available.