Use Requirements for Bowen Ratio and Eddy Correlation Determination of Evapotranspiration
Reduced costs and complexity are encouraging more operational use of eddy correlation (EC) and energy balance Bowen ratio (EBBR) instrumentation for estimating evapotranspiration. Often...
Ultrasonic Flow Meter Testing
Six ultrasonic flow meters were tested in a hydraulics laboratory. Accuracies better than 2% were obtained with two transit-time meters on 14 inch diameter steel tubing. Poorer accuracies...
Power Formula for Open-Channel Flow Resistance
This paper evaluates various power formulas for flow resistance in open channels. Unlike the logarithmic resistance equation that can be theoretically derived either from Prandtl's...
Analysis of Progressive Development on Alluvial Fans
Flow on alluvial fans is considered to be somewhat unpredictable and complex, experiencing high velocities, avulsions, erosion, and deposition causing a dynamic topography with flooding...
Kinematics and Dynamics of Overland Flow
C. Y. Guo combined the kinematic wave approximation with Horton's infiltration formula to analytically solve the propagation of a two-dimensional overland flow on a previous...
Evaluation of Diffusion Models for Flood Routing
A study has been conducted to define the range of conditions with respect to hydrographs and channels encountered by SCS engineers in flood plain/flood control projects and to test two...
Drag Characteristics of Spheres in Bingham Fluids
R.W. Ansley and T.N. Smith's type of drag relation can be traced back closely, if not completely, to the Newtonian drag curve. The equivalent diameter for a sphere in a Bingham...
Hydraulic Effects on Swimming Fish in Fish Passage Structures
The implications of profile drag, weight, and buoyant forces on energy and power requirements of fish swimming through fish passage structures are considered. Where hydraulic grade lines...
A Numerical Solution Technique for Incompressible Flow
Presented is a numerical solution technique which employs the explicit predictor-corrector scheme of R.W. MacCormack in solving the governing two-dimensional equations of motion on a staggered...
An Error Analysis of the Dynamic Wave Model
The Dynamic Wave Operational Model (DWOPER) is used to forecast river stages on the Lower Columbia River. DWOPER was developed by the National Weather Service's Hydrologic...
Candor Chasma Camp
This paper proposes a camp at Mars, in the Coprates region of the Valles Marineris rift, just below the equator on Candor Mensa 6�-12'S, 73�-30'W. Beginning at...
Dynamic Analysis of the Joint Dominated Beam
A method is presented herein to determine the vibration modes of the Joint Dominated Beam. An example of a cantilever beam is selected for this purpose. The truss type beam is analysed...
Differential Gravitional Forces on Large Space Structures
Effects of the differential gravitational forces have been investigated simultaneously on the orbital motion, attitude motion, and axial deformation of a very large axially flexible space...
The Planar Truss - An Active Control Test Bed
The authors have developed a laboratory planar truss and structural dynamic models which correlate well. The inherent fraction critical damping (? = .004 for the first mode) is very low...
Earthquake Engineering and Soil Dynamics II?Recent Advances in Ground-Motion Evaluation
Ground-motion determination for analysis and design of engineering structures is a shared, interdisciplinary task involving geologists, seismologists, geophysicists, geotechnical engineers,...
Simulation of Long Period Ground Motions for a Large New Madrid Earthquake
Ground motions for a large New Madrid earthquake are simulated to provide response spectra in the period range of 0.5-20 seconds for hard rock sites at Chicago and Atlanta. The ground...
Minipiles Mature in America
After being born more than 40 years ago in Europe, minipiles are maturing in the United States. Their distinctive feature is a relatively small diameter, rarely larger than 12 in. Constructing...
Journal of Aerospace Engineering
The Journal of Aerospace Engineering promotes the implementation and development of space and aerospace technologies and their transfer to other civil engineering applications. Topics of interest include...
Subsiding Problems with Slurry Walls
Slurry walls for excavation support cost far more time and money than the sheeting wall or the tieback and lagging wall. Criteria to decide where to consider using slurry walls and where...
Overview of Factors Involved in the Mexico Earthquakes
The Mexico earthquakes provided many opportunities for learning. New knowledge has been obtained and continuing research will provide additional knowledge. The earthquakes have also demonstrated...
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