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1	Tidal Dynamics in Coastal Aquifers Teo, Hhih-Ting, h.teo@griffith.edu.au January 2003 (has links) The prediction of coastal groundwater movement is necessary in coastal management. However, the study in this field is still a great challenge due to the involvement of tidal-groundwater interactions and the phenomena of hydrodynamic dispersion between salt-fresh water in the coastal region. To date, numerous theories for groundwater dynamic have been made available in analytical, numerical and also experimental forms. Nevertheless, most of them are based on the zeroth-order shallow flow, i.e. Boussinesq approximation. Two main components for coastal unconfined aquifer have been completed in this Thesis: the vertical beach model and the sloping beach model. Both solutions are solved in closed-form up to higher order with shallow water parameter ([epsilon]) and tidal amplitude parameter ([alpha]). The vertical beach solution contributes to the higher-order tidal fluctuations while the sloping beach model overcomes the shortcomings in the existing solutions. From this study, higher-order components are found to be significant especially for larger value of [alpha] and [epsilon]. Other parameters such as hydraulic conductivity (K) and the thickness of aquifer (D) also affect the water table fluctuations. The new sloping solution demonstrated the significant influence of beach slope ([beta]) on the water table fluctuations. A comprehensive comparison between previous solution and the present sloping solution have been performed mathematically and numerically and the present solution has been demonstrated to provide a better prediction tidal dynamics coastal aquifers aquifer hydraulic conductivity tidal fluctuation sloping beach soil porosity Boussinesq equation vertical beach coastal groundwater movement beaches
2	Applications of Finite Element and Computer Graphics Techniques in Aquifer Analysis O'Donnell, D. F., Wilson, L. G., Rasmussen, W. O. 12 April 1975 (has links) From the Proceedings of the 1975 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona Academy of Science - April 11-12, 1975, Tempe, Arizona / Aquifer flow systems have been simulated by a variety of techniques. The results of these simulations can be presented in several ways. Of the approaches in modeling groundwater flow, the finite element method offers an advantage through its ease in approximating various boundary conditions. Graphic methods offer a means of simplifying data presentation. This study demonstrates the use of a finite element technique in modeling aquifer flow systems, and illustrates a 3-dimensional graphic approach when representing the results of the modeling. Hydrology -- Arizona. Water resources development -- Arizona. Hydrology -- Southwestern states. Aquifer systems Aquifer testing Aquifer management Finite element analysis Graphical analysis Model studies Groundwater movement Computers Computer models Equations
3	The Effect of Development on Groundwater in the Parker Strip Everett, L. G., Schultz, T. R. 20 April 1974 (has links) From the Proceedings of the 1974 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona Academy of Science - April 19-20, 1974, Flagstaff, Arizona / The 14.6 miles of the Colorado River bounded by Parker Dam and Headgate Rock Dam has been referred to as the Parker Strip. This river reach has become a high use recreation area during the past decade with 4,000 permanent residents and as many as 120,000 water enthusiasts on long weekends. The riparian area of the river is heavily clustered with mobile homes, marinas and public beaches. The means of sewage disposal is exclusively via septic tanks. Recent surveys by the Environmental Protection Agency, Arizona State Department of Public Health and the University of Arizona have localized surface water bacteria levels that may indicate a developing groundwater problem. The geohydrology of the area indicates that the septic tanks are located in Post -Pliocene Colorado River deposits. The deposits are quite thin and relatively narrow. Since the deposits are locally derived sands and gravels, the horizontal hydraulic conductivities are such that a relatively short flow time to the river may result. Intensive evaluation of the degradation of the water quality in these deposits is needed to determine if the ground water supply was jeopardized by septic tank systems. Hydrology -- Arizona. Water resources development -- Arizona. Hydrology -- Southwestern states. Water quality Colorado River Septic tanks Groundwater movement Water pollution Recreation facilities Arizona California Water quality standards Public health Water pollution Water analysis Water pollution sources Water quality control Water chemistry Sewage disposal Domestic wastes Permeability Recreation Recreation wastes Parker strip

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