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Full-Text Articles in Physical Sciences and Mathematics
Hydraulic Design Algorithms For Upgrading And Enhancing Water Distribution Systems, Don J. Wood, William T. Gilbert
Hydraulic Design Algorithms For Upgrading And Enhancing Water Distribution Systems, Don J. Wood, William T. Gilbert
KWRRI Research Reports
The primary objective of this work was to develop algorithms for directly determining design characteristics for effectively enhancing, modifying or adding to existing water distribution systems. This is accomplished by modifying the basic hydraulic network equations to explicitly determine required design parameters to just meet specified conditions. Initially work was completed on directly determining pipeline diameters and directly determining pipeline and network resistance characteristics. This work was published in technical journals and established the feasibility of the approach but did not demonstrate the scope and versitility of the proposed approach. In this report a general approach is developed and tested …
Comparison Of Four Infiltration Models In Characterizing Infiltration Through Surface Mine Profiles, Larry G. Wells, A. D. Ward, I. D. Moore, R. E. Phillips
Comparison Of Four Infiltration Models In Characterizing Infiltration Through Surface Mine Profiles, Larry G. Wells, A. D. Ward, I. D. Moore, R. E. Phillips
Biosystems and Agricultural Engineering Faculty Publications
A laboratory infiltrometer system was used to evaluate the infiltration process through reconstructed surface mine profiles. Six different profiles were subjected to constant simulated rainfall intensities for selected test conditions. Surface runoff rates were monitored and transient soil moisture contents in the profiles were measured with a gamma density gauge. Unsaturated hydraulic conductivity relationships were determined using Campbelfs method and the "zero-flux" procedure. The infiltration process was modeled by the SCS curve number method, a form of Holtan's equation, the Green-Ampt model and Richards' equation. SCS curve numbers were determined by fitting the method to the observed results. Richards' equation …
Traction Characteristics Of Prepared Traffic Lanes, Eddie C. Burt, James H. Taylor, Larry G. Wells
Traction Characteristics Of Prepared Traffic Lanes, Eddie C. Burt, James H. Taylor, Larry G. Wells
Biosystems and Agricultural Engineering Faculty Publications
Traction characteristics of lugged and smooth tires were compared on prepared traffic lanes and on conventional seedbed conditions. Results indicated that elevated traffic lanes offer important traction advantages over seedbeds in wet soil conditions. In dry soil conditions, traction on elevated traffic lanes was sometimes less than on the seedbed conditions. A timeliness advantage in mobility for the elevated traffic lanes was found to be up to 2 days in extremely wet conditions. A non-elevated traffic lane showed no traction advantage in wet conditions.