AuthorGanfoud, Ahmed Abulaid.
KeywordsHydraulic engineering -- Laboratory manuals.
Hydraulic engineering -- Experiments.
Hydraulic laboratories -- Arizona -- Tucson.
Hydraulics -- Laboratory manuals.
Hydraulics -- Experiments.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Degree ProgramGraduate College
Civil Engineering and Engineering Mechanics
Degree GrantorUniversity of Arizona
Showing items related by title, author, creator and subject.
Fusion of Time-Lapse Gravity Survey and Hydraulic Tomography for Estimating Spatially Varying Hydraulic Conductivity and Specific Yield FieldsTsai, Jui-Pin; Yeh, Tian-Chyi Jim; Cheng, Ching-Chung; Zha, Yuanyuan; Chang, Liang-Cheng; Hwang, Cheinway; Wang, Yu-Li; Hao, Yonghong; Univ Arizona, Dept Hydrol & Atmospher Sci; Department of Civil Engineering; National Chiao-Tung University; Hsinchu Taiwan; et al. (AMER GEOPHYSICAL UNION, 2017-10)Hydraulic conductivity (K) and specific yield (S-y) are important aquifer parameters, pertinent to groundwater resources management and protection. These parameters are commonly estimated through a traditional cross-well pumping test. Employing the traditional approach to obtain detailed spatial distributions of the parameters over a large area is generally formidable. For this reason, this study proposes a stochastic method that integrates hydraulic head and time-lapse gravity based on hydraulic tomography (HT) to efficiently derive the spatial distribution of K and Sy over a large area. This method is demonstrated using several synthetic experiments. Results of these experiments show that the K and Sy fields estimated by joint inversion of the gravity and head data set from sequential injection tests in unconfined aquifers are superior to those from the HT based on head data alone. We attribute this advantage to the mass constraint imposed on HT by gravity measurements. Besides, we find that gravity measurement can detect the change of aquifer's groundwater storage at kilometer scale, as such they can extend HT's effectiveness over greater volumes of the aquifer. Furthermore, we find that the accuracy of the estimated fields is improved as the number of the gravity stations is increased. The gravity station's location, however, has minor effects on the estimates if its effective gravity integration radius covers the well field.
Hydraulic, water and energy use evaluation of subsurface trickle irrigation systemYitayew, Muluneh; Copeland, Russell Dean, 1963- (The University of Arizona., 1992)The hydraulics, water use, and energy use of a two year old subsurface drip irrigation system installed at the Maricopa Agricultural Center in southern Arizona were examined to evaluate the performance of typical subsurface drip irrigation systems. Although the pressure distribution was better than expected due to the effect of the looped network, the average discharge rate of the drip tape decreased by 20% as reflected by the change in the discharge coefficient from 0.45 to 0.36 over two years and emitter plugging resulted in the statistical uniformity being only 64.6%. Water use was higher than expected at 50.76 and 41 inches during the two years of use. The total annual energy requirements for the system including direct, 7593 megajoules/hectare/year, and indirect, 12965 megajoules/hectare/year, inputs was 24318 megajoules/hectare/year.
Comparison of measured hydraulic properties to predicted values of the upper San Pedro watershed, ArizonaFerre, Paul; Olander, Anastasia; Ferre, Paul (The University of Arizona., 2004)An understanding of the distribution and ranges of hydraulic and physical properties of the subsurface sediments in the Upper San Pedro Subwatershed in Southwestern Arizona is needed to estimate infiltration and recharge rates to the aquifer system. The objectives of this thesis are to compare measured saturated hydraulic conductivity values to standard references and to test available predictive models of soil hydraulic properties based on particle size distributions against hydraulic properties measured directly on undisturbed cores. Hydraulic and physical properties compared well to standard references. The predictive models compared well with sand type sediments, but did not compare well with those cores with large percentages of clay and silt. A conclusion is that predictive models may not produce adequate results to estimate infiltration and recharge rates to an aquifer system if the subsurface sediments have large percentages of clay and/or silt. Furthermore, exclusion of large percentages of gravel may produce inaccurate results for physical and hydraulic properties.