Civil Engineering Reports

Permanent URI for this collection

https://hdl.handle.net/10217/100377

From 1947 to 1996, the Colorado State University Department of Civil Engineering issued reprints of engineering papers, bulletins, and documents as the series Civil Engineering Reports. University faculty and students authored most reports, and the department assigned report numbers in order of acquisition for each year. The series grew to more than 2,000 reports, of which nearly 1,300 are available in this digital collection.

Other CERs may be found in Mountain Scholar - Archives and Special Collections and in the Groundwater Data Collection.

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Now showing 1 - 20 of 36

Open Access
Analytical study of the mechanics of scour for three-dimensional jet
(Colorado State University. Libraries, 1960-08) Iwagaki, Yuichi, author; Smith, George L., author; Albertson, Maurice L., author; Colorado State University Research Foundation, publisher
A theory of scour for a three-dimensional jet impinging on an erodible bed is developed and applied to the analysis of experimental data obtained in the Hydraulic Laboratory, Colorado State University.
Open Access
Analytical study of the mechanics of scour for two-dimensional jet
(Colorado State University. Libraries, 1960-04-08) Duckstein, Lucien, author; Iwagaki, Yuichi, author; Smith, George L., author; Albertson, Maurice L., author; Colorado State University, Civil Engineering Department, publisher
Using the rectilinear coordinate system the equation of continuity of mass sediment transport is derived, and the continuity equation is used to help in describing mathematically the phenomenon of scour by the continuity equation. The relationship between the shape of the scour hole and its variation with time is investigated for different conditions of scour and deposition. Expressions for distribution of sediment transport along the bed are derived for each condition. The impingement of a two-dimensional on a normal boundary is analyzed by making the assumption that the Bernoulli Equation is valid in the neighborhood of the stagnation point. Plane, potential flow is considered first, followed by flow of a fluid with viscosity. For flow with viscosity from submerged and non-submerged outlets, expressions for the horizontal velocity and shear distribution along the boundary are developed using Bernoulli's theorem and the boundary layer theory. The variation of the depth of scour is determined for two conditions of outlets by assuming a law of open channel flow for sediment transportation and by using the previously determined shear distributions and the continuity equation. In particular, the variation of scour depth with respect to time and the final depth of scour are described theoretically in terms of dimensionless parameters. It is then shown that the development of the scour hole with respect to time follows the power law and the logarithmic law for the submerged and non-submerged outlets respectively before the final state is reached. The influence of the angle of the jet is analyzed in the manner as the case of a vertical jet. In this case, expressions for the variations of the depth of scour with respect to time and the final depth of the sour are also developed.
Open Access
Characteristics of bed forms and regimes of flow in alluvial channels
(Colorado State University. Libraries, 1959) Garde, R. J., author; Albertson, Maurice L., author; Civil Engineering Section, Colorado State University, publisher
The characteristics of the bed and the water surface in an alluvial channel are changed by changing the characteristics of the flow, the fluid, and/or the sediment. This paper first reviews the existing literature on the characteristics of bed forms and regimes of flow over an alluvial bed and then it reports the studies made by the writers about the scale of ripples and dunes and about the criteria for the prediction of different regimes of flow in an alluvial channel.
Open Access
Design characteristics of the vortex-tube sand trap
(Colorado State University. Libraries, 1950) Koonsman, George Lee, author; Albertson, Maurice L., author; Colorado Agricultural and Mechanical College, publisher
Open Access
Determination of wind chill on a life-sized clothed Copper Man
(Colorado State University. Libraries, 1952) Cermak, Jack E., author; Thomas, R. A., author; Albertson, Maurice L., author; Colorado A & M College, Civil Engineering Department, publisher
Open Access
Development of a graduate and research program in fluid mechanics
(Colorado State University. Libraries, 1961-06-28) Chamberlain, A. R. (Adrian Ramond), author; Albertson, Maurice L., author; Colorado State University, publisher
Open Access
Dimensional analysis as a tool in hydraulic design and research
(Colorado State University. Libraries, 1952) Albertson, Maurice L., author; Colorado A & M College, Civil Engineering Department, publisher
Open Access
Direct solution for apron elevation
(Colorado State University. Libraries, 1952) Albertson, Maurice L., author; Colorado A & M College, publisher
Open Access
Discussion of "Riverbed degradation below large capacity reservoirs"
(Colorado State University. Libraries, 1956-05) Albertson, Maurice L., author; Mostafa, M. Gamal, author; American Society of Civil Engineers, publisher
Open Access
Effect of shape on the fall velocity of gravel particles
(Colorado State University. Libraries, 1953) Albertson, Maurice L., author; State University of Iowa, publisher
Open Access
Evaporation from a plane boundary
(Colorado State University. Libraries, 1951-02) Albertson, Maurice L., author; Civil Engineering Department, Colorado A and M College, publisher
Open Access
Influence of shape on the fall velocity of sedimentary particles
(Colorado State University. Libraries, 1953-05) Schulz, Edmund F., author; Wilde, Robert Harris, author; Albertson, Maurice L., author; Colorado Agricultural and Mechanical College, Department of Civil Engineering, publisher
Techniques used in modern sediment engineering require knowledge of the fall velocity of sediment particles in water. Under certain conditions the fall velocity of a sphere can be computed using Stokes Law. Stokes Law, however, considers only the viscous forces on the particle. The resistance of particles falling in water is attributed to (1) viscous deformation of the fluid, and (2) inertial losses in the fluid caused by acceleration (both tangential and normal acceleration) of the fluid around the particle. The Reynolds number (a ratio of the inertial forces to the viscous forces) is a dimensionless parameter which expresses the relative importance of the inertial forces to the viscous forces in the motion of the fluid around the particle. Stokes Law is valid when the viscous forces are the predominate cause of the resistance of the particle. As Reynolds numbers become greater than 1.0 the inertial forces assume greater importance and any equation which considers only the viscous forces (such as Stokes Law) becomes less and less valid. A quartz sphere approximately 0.1 mm diameter falling in water at 20°C (67°F) would have a Reynolds number of 1.0. To study the fall velocity of natural particles, dimensionless parameters were employed to give general solutions to the equations involved. The principal parameters employed were the Reynolds number (ratio of inertial forces to viscous forces), the drag coefficient (intensity of drag force) and the shape factor. Particles were selected at random from a number of samples of sediment having different geographical and geologic origins. The shape factor of these particles was measured. The particles were then dropped in water and the fall velocity measured. By measuring the weight, the volume, the fall velocity and the shape of the particle, the dimensionless parameters previously listed could be computed and a graph of drag coefficient versus Reynolds number with the shape factor as a third variable could be prepared. The particles studied in this manner ranged in size from 0.25 mm to 25 mm. To verify the results from the tests on the small particles, the gravel-sized particles were also dropped in oil. Because of the viscosity difference between the water and the oil, the larger gravel-sized particles had Reynolds numbers between 1.0 and 500 when dropped in oil. It was found that the affects of surface roughness could not be ignored; therefore, data obtained from the extremely rough particles were separated from the more rounded material by plotting on separate graphs. The data obtained by Krumbein and Malaika in tests on artificial particles were also plotted on these two graphs. Other information regarding the extent of variation of the shape factor, relation of average shape factor to sieve size, relation of sieve size to nominal diameter and intermediate axes, relation of sieve diameter to sedimentation diameter and shape factor have also been investigated. All the available data have been assembled in the Appendix.
Open Access
Influence of shape on the fall velocity of sedimentary particles
(Colorado State University. Libraries, 1954-07) Schulz, Edmund F., author; Wilde, R. H., author; Albertson, Maurice L., author; U.S. Army Engineer Division, Missouri River, publisher
Techniques used in modern sediment engineering require knowledge of the fall velocity of sediment particles in water. Under certain conditions, the fall velocity of a sphere can be computed using Stokes Law. Stokes Law, however, considers only the viscous forces on the particle. The resistance of particles falling in water is attributed to (1) viscous deformation of the fluid, and (2) inertial losses in the fluid caused by acceleration (both tangential and normal acceleration) of the fluid around the particle. The Reynolds number (a ratio of the inertial forces to the viscous forces) is a dimensionless parameter, which expresses the relative importance of the inertial forces to the viscous forces in the motion of the fluid around the particle. Stokes Law is valid when the viscous forces are the predominate cause of the resistance of the particle. As Reynolds, numbers become greater than 1.0 the inertial forces assume greater importance and any equation, which considers only the viscous forces (such as Stokes Law), becomes less and less valid. A quartz sphere approximately 0.1 mm diameter falling in water at 20° C (68° F) would have a Reynolds number of 1.0. To study the fall velocity of natural particles, dimensionless parameters were employed to give general solutions to the equations involved. The principal parameters employed were the Reynolds number (ratio of inertial forces to viscous forces), the drag coefficient (intensity of drag force) and the shape factor. Particles were selected at random from a number of samples of sediment having different geographical and geologic origins. The shape factor of these particles was measured. The particles were then dropped in water and the fall velocity measured. By measuring the weight, the volume, the fall velocity and the shape of the particle, the dimensionless parameters previously listed could be computed and a graph of drag coefficient versus Reynolds number with the shape factor as a third variable could be prepared. The particles studied in this manner ranged in size from 0.25 mm to 25 mm. To verify the results from the tests on the small particles, the gravel-sized particles were also dropped in oil. Because of the viscosity difference between the water and the oil, the larger gravel-sized particles had Reynolds numbers between 1.0 and 500 when dropped in oil. It was found that the effects of surface roughness could not be ignored; therefore, data obtained from the extremely rough particles were separated from the more rounded material by plotting on separate graphs. The data obtained by Krumbein and Malaika in tests on artificial particles were also plotted on these two graphs. Other information regarding the extent of variation of the shape factor, relation of average shape factor to sieve size, relation of sieve size to nominal diameter and intermediate axes, relation of sieve diameter to sedimentation diameter and shape factor have also been investigated. All the available data have been assembled in the Appendix.
Open Access
Needed research in irrigation and drainage
(Colorado State University. Libraries, 1965) Albertson, Maurice L., author; Colorado State University, publisher
On 19, 20, and 21 March, 1964, an Irrigation and Drainage Research Conference was held in Logan, Utah, to delineate and stimulate high quality research needed in selected subject areas in order to advance the status of knowledge, and thereby improve the quality of engineering in the planning, design, operation, and maintenance of irrigation and drainage systems. The conference was one of the activities of the Research Committee of the Irrigation and Drainage Division in coordination with the Executive Committee of the Irrigation and Drainage Division of the ASCE. The conference was an outgrowth of a survey which had been conducted earlier, designed to elicit information from the profession on the status of current research and future research needed in the general field of irrigation and drainage. The results of this survey showed clearly that there are six major areas needing expanded research programs. They are as follows: 1. Evaporation from water and soil 2. Salinity and alkali problems. 3. Stable channels 4. Small, low-cost hydraulic structures for conveyance and distribution systems 5. Weather modification 6. Ground-water management. The conference consisted of special speakers having national reputations in the fields closely related to irrigation and drainage together with panels for each of the six subject areas -- the membership being selected from throughout the United States and the world in order to have on each panel those individuals who are best informed on each particular subject. A report is in preparation giving the detailed information from each of the panels. This paper is a summary of the report. The results of the conference showed clearly that there is a considerable need for research on specific technical subjects--but there is also considerable need for expanding public relations activities, instrumentation development centers, and computing centers. There is also a clear indication that additional conferences and committees need to be developed.
Open Access
Outline of recent developments in the theories of sediment transportation, An
(Colorado State University. Libraries, 1955) Albertson, Maurice L., author; Colorado Agricultural and Mechanical College, publisher
Open Access
Principles of energy dissipation in erosion-control structures
(Colorado State University. Libraries, 1957) Albertson, Maurice L., author; Smith, George L., author; Colorado A and M College, Civil Engineering Department, publisher
Open Access
Proposed modifications to the Gross Dam outlet works
(Colorado State University. Libraries, 1968-11) Albertson, Maurice L., author; Tullis, J. Paul, author; Colorado State University, publisher
Open Access
Recent developments in the design of a simple overfall structure
(Colorado State University. Libraries, 1956-01-13) Hallmark, Dasel Eugene, author; Albertson, Maurice L., author; Colorado Agricultural and Mechanical College, publisher
Open Access
Recommended modifications to the Cheesman Outlet Works
(Colorado State University. Libraries, 1969) Tullis, J. Paul, author; Albertson, Maurice L., author; Colorado State University, publisher
Open Access
Report of the fluctuation studies in stilling wells for Armco metergates model no. 101
(Colorado State University. Libraries, 1951-01) Albertson, Maurice L., author; Colorado Agricultural Experiment Station, Civil Engineering Section, publisher