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; Key Laboratory for Water Environment and Resources; Tianjin Normal University; Tianjin China; Department of Civil Engineering; National Chiao-Tung University; Hsinchu Taiwan; State Key Laboratory of Water Resources and Hydropower Engineering Science; Wuhan University; Wuhan China; Department of Civil Engineering; National Chiao-Tung University; Hsinchu Taiwan; Department of Civil Engineering; National Chiao-Tung University; Hsinchu Taiwan; Department of Hydrology and Atmospheric Sciences; The University of Arizona; Tucson AZ USA; Key Laboratory for Water Environment and Resources; Tianjin Normal University; Tianjin China (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.
In-situ tests of the hydraulic performance of grout borehole seals.Greer, William Bryan. (The University of Arizona., 1990)Three tests are proposed for determining the hydraulic properties of in-situ borehole seals. Two consist of monitoring the rate of injection of water at constant pressure into an injection zone at one end of a seal and monitoring the collection rate or rate of flow out of a free-draining collection zone at the other end. The third test is performed by shutting in the collection zone and monitoring the buildup in hydraulic head. One-dimensional and axisymmetric three-dimensional flow models are presented for analyzing test results. In the one-dimensional models, the seal is assumed to be a homogeneous and isotropic porous medium. In the axisymmetric models, the seal and surrounding rock mass are taken as homogeneous and isotropic porous media. The equation for saturated, confined ground-water flow is assumed to apply. The hydraulic properties of the seal are expressed by its hydraulic conductivity and specific storage. In the axisymmetric models, the conductivity and specific storage of the rock mass are included in the formulation. Closed-form solutions are presented for the analysis of tests using the one-dimensional models. Analysis with the axisymmetric models is numerical using an available computer code for ground-water flow. The code is used to examine the effects of variations in hydraulic parameters on the measured quantities in the tests (i.e. flow rates or head) and to compare the one-dimensional and axisymmetric models. Methods are presented for obtaining the hydraulic properties of the seal and/or rock mass by analysis of test results. A fourth test, a tracer travel-time test, is presented as a means for detecting the existence of a high-velocity flow path through or around the seal. The test methods are applied to cement grout borehole seals from 10 to 36 cm in length and 10 cm in diameter in two rock types, a recrystallized limestone and a dense basalt.
Micromechanical fracture modeling on underground nuclear waste storage: Coupled mechanical, thermal, and hydraulic effectsLeem, Junghun (The University of Arizona., 1999)Coupling effects between thermal, hydraulic, chemical and mechanical (THCM) processes for rock materials are one of major issues in Geological engineering, Civil engineering, Hydrology, Petroleum engineering, and Environmental engineering. In all of these fields, at least two mechanisms of THCM coupling are considered. For an example, thermal, hydraulic, and mechanical coupling effects are important in Geological engineering and Civil engineering. The THM coupling produces effects on underground structures, since the underground structures are under influences of geothermal gradient, groundwater, gravitational stresses, and tectonic forces. In particular, underground repository of high-level nuclear waste involves all four of the THCM coupling processes. Thermo-hydro-mechanical coupling model for fractured rock media has been developed based on micromechanical fracture model [Kemeny 1991, Kemeny & Cook 1987]. The THM coupling model is able to simulate time- and rate-dependent fracture propagation on rock materials, and quantify characteristics of damage by extensile and shear fracture growth. The THM coupling model can also simulate coupled thermal effects on underground structures such as high-level nuclear waste repository. The results of thermo-mechanical coupling model are used in conducting a risk analysis on the structures. In addition, the THM coupling model is able to investigate variations of fluid flow and hydraulic characteristics on rock materials by measuring coupled anisotropic permeability. Later, effects of chemical coupling on rock materials are investigated and modified in the THM coupling model in order to develop a thermo-hydro-chemo-mechanical coupling model on fractured rocks. The THCM coupling model is compared with thermal, hydraulic, chemical, and mechanical coupling tests conducted at the University of Arizona. The comparison provides a reasonable prediction for the THCM coupling tests on various rock materials. Finally, the THCM coupling model for fractured rocks simulates the underground nuclear waste storage in Yucca Mountain, Nevada, and conducted performance and risk analysis on the repository.