Browsing by Author "Simons, D. B., author"

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Open Access
Data evaluation for Yazoo Basin Study
(Colorado State University. Libraries, 1978-06) Simons, D. B., author; Department of Civil Engineering, Colorado State University, publisher
Open Access
Flume studies using medium sand (0.45mm)
(Colorado State University. Libraries, 1961) Simons, D. B., author; Richardson, E. V., author; Albertson, M. L., author; USGS, publisher
The results pertaining to the progress during the first year of a comprehensive study of fluvial hydraulics, specifically roughness in alluvial channels, are presented. The report is based on the data collected by using a recirculating rectangular flume of adjustable slope, 8 feet wide, 2 feet deep, and 150 feet long with an alluvial bed of sand approximately 0. 7 foot deep. A typical river sand has been utilized. Its median diameter, d, is 0.45 mm and its relative standard deviation, σ, is 1.60. A total of 45 runs have been completed over a range of bed roughness forms extending from the plane bed with no movement to antidunes. In order to achieve this range, the discharge was varied from 2 to 21 cubic feet per second, the average velocity was varied from 0.5 to 7 feet per second, the average depth of flow was varied from 0.3 to 1.0 foot, and the slope of water surface was varied from 0.00014 to 0.01. Other variables measured included: water temperature, bed roughness, suspended sediment load, and total sediment load. Terms describing channel roughness were formulated and tested based on the data collected. The results indicate, as one possibility, that the Chezy coefficient of discharge in dimensionless form C/√g is a function of parameters involving the Froude number, viscosity of fluid, fall velocity, specific weight of the sediment, median diameter of the sediment particles and slope of the water surface. The various expressions presented were formulated on the fundamental concepts of fluid mechanics, dimensional analysis, and a detailed study of the variations of the variables measured. In the two regimes of flow the following forms of bed roughness were observed. For tranquil flow regime: plane bed without movement, ripples, dunes and transition from dunes to rapid flow forms. For rapid flow regime: plane bed with movement, standing sand waves, and antidunes. These forms of bed roughness are discussed and defined in various relationships. Other data of both a laboratory and a field nature were combined with the flume data to develop a graphical relationship in which the form of bed roughness is related to size of bed material.
Open Access
Quasi-analytical formulation for calculation of infiltration and runoff
(Colorado State University. Libraries, 1981) Simons, D. B., author; Li, R. M., author; Eggert, K. G., author; Zachmann, D., author; The Department, publisher
Open Access
Sedimentation study of the Yazoo River Basin. Greenwood Bendway Study
(Colorado State University. Libraries, 1979-08) Simons, D. B., author; Li, R. M., author; Brown, G. O., author; Civil Engineering Department, Engineering Research Center, Colorado State University, publisher
The primary purpose of the Phase I study was to evaluate the overall river basin response in both the main stem and its major tributaries associated with the Upper Yazoo Project. In accordance with the letter dated March 30, 1978, from the U.S. Army Corps of Engineers, Colorado State University was requested to conduct an additional study on the Greenwood Bendway. The purpose of this additional study is to study flood control and sedimentation problems associated with the Greenwood Bendway in the Yazoo River Basin, Mississippi.
Open Access
Sedimentation study of the Yazoo River Basin. Phase I, General report
(Colorado State University. Libraries, 1978-06) Simons, D. B., author; Li, R. M., author; Brown, G. O., author; Chen, Y. H., author; Ward, T. J., author; Duong, N., author; Ponce, V. M., author; Civil Engineering Department, Engineering Research Center, Colorado State University, publisher
The purpose of this investigation is to determine the extent of sediment problems in the main stem Yazoo-Tallahatchie-Coldwater River System and principal tributaries excluding the Sunflower River Basin. In addition, this study recommends ways to control these sedimentation problems and others that may be encountered with the proposed Upper Auxiliary Channel Alternative Project in operation. This general report describes the findings of the investigation.
Open Access
Sedimentation study of the Yazoo River Basin. Phase I, Temporal design
(Colorado State University. Libraries, 1978-06) Simons, D. B., author; Li, R. M., author; Ward, T. J., author; Duong, N., author; Civil Engineering Department, Engineering Research Center, Colorado State University, publisher
The purpose of this investigation is to determine the extent of sediment problems in the main stem Yazoo-Tallahatchie-Coldwater River System and principal tributaries excluding the Sunflower River Basin. In addition, this study recommends ways to control these sedimentation problems and others that may be encountered with the proposed Upper Auxiliary Channel Alternative Project in operation. This report details techniques for developing discharge records for the Yazoo River Basin Sedimentation Study.
Open Access
Sedimentation study of the Yazoo River Basin. Phase II, General report
(Colorado State University. Libraries, 1983-11) Simons, D. B., author; Li, R. M., author; Brown, G. O., author; Civil Engineering Department, Engineering Research Center, Colorado State University, publisher
Open Access
Sedimentation study of the Yazoo River Basin. User manual for program KUWASER
(Colorado State University. Libraries, 1979-08) Simons, D. B., author; Li, R. M., author; Brown, G. O., author; Civil Engineering Department, Engineering Research Center, Colorado State University, publisher
Open Access
Sedimentation study of the Yazoo River Basin. User's manual for the Yazoo Data Storage and Retrieval System
(Colorado State University. Libraries, 1978-10) Simons, D. B., author; Li, R. M., author; Duong, N., author; Civil Engineering Department, Engineering Research Center, Colorado State University, publisher
This manual describes the Yazoo Data Storage and Retrieval System (YAZBD). This system was developed as part of the Phase I - Sedimentation Study of the Yazoo River Basin. The system enables users with varying amounts of computer experience to efficiently access, retrieve, store, and analyze large amounts of hydraulic and hydrological data from the Yazoo Basin. Volume I of this manual is designed for general users. It concentrates on accessing, retrieving, and analyzing data. Volume II is intended for the system analysts and/or data managers. Included are details of program execution, input and output, data updating, flowcharts, variable definitions, and hardware and software requirements.
Open Access
Theoretical and mathematical model tests of designs of two suspended sediment sampling devices
(Colorado State University. Libraries, 1983-07) Simons, D. B., author; Li, R. M., author; Brown, G. O., author; Civil Engineering Department, Engineering Research Center, Colorado State University, publisher
Open Access
Unsteady movement of ripples and dunes related to bed-load transport
(Colorado State University. Libraries, 1965) Simons, D. B., author; Richardson, E. V., author; Nordin, C. F., Jr., author
Two methods for computing bed-load transport from dune movement are considered. An equation based on the mean forward velocity and mean height of ripples and dunes is applied to flume data, and yields satisfactory results where the average dune shapes, velocities and heights can be determined accurately, as it the case for uniform two-dimensional flow. For unsteady flow, or for three-dimensional flow, where the size, shape, and movement of dunes varies in time and space, the volume of material passing through a series of incremental widths during some total time can be determined from sonic records. Bed-load transport rates are then estimated by integrating across the width of the stream. Applications of these concepts to field conditions are considered.
Open Access
User's manual for program CHANSEC
(Colorado State University. Libraries, 1978-04) Simons, D. B., author; Li, R. M., author; Brown, G. O., author; Barkau, L. A., author; Civil Engineering Department, Engineering Research Center, Colorado State University, publisher
In computer simulation of large river systems, hand modification of cross-sectional data is so time consuming that evaluation of more than a few alternative channel designs is impractical. Because of this, an interactive computer program (CHANSEC) was developed that modifies an existing set of digitized cross sections to reflect modifications such as channelization, levee placement or changes in channel roughness. The program also plots cross sections and the bed profile on a Tektronix screen or pen plotter. In only a few minutes, this program can modify the cross section file of hundreds of miles of river to reflect channelization. A manual was prepared to assist the computer user in utilizing Program CHANSEC.
Open Access
Yazoo River basin sedimentation study: cross sectional data
(Colorado State University. Libraries, 1978-04) Simons, D. B., author; Li, R. M., author; Brown, G. O., author; Civil Engineering Department, Engineering Research Center, Colorado State University, publisher
This manual contains the cross-sectional data used in the Yazoo River Basin Sedimentation Study. The report shows how the complex geometric system has been abstracted to allow simulations of water and sedimentation processes using a physical process mathematical model. This manual also serves as a reference for the existing cross-sectional conditions in the Yazoo River Basin, and to conditions if the proposed plan "E" modifications in addition, are implemented as designed. This manual contains longitudinal river profiles, schematics of cross-sectional locations, lists of cross sections used and plots of the cross sections.