These relationships are useful for estimating hydraulic characteristics that are needed for the designs of wells and well fields and for preliminary water-resources management. presented an opportunity to try the multiple-step drawdown test under field conditions not en. Relationships between well losses constant for 30 wells with transmissivity and specific capacity, are constructed. Curves showing computed drawdown after pumping well 8 at a. Rorabaugh, Graphical and Theoretical Analysis of Step Drawdown Test of Artesian Well, Proceedings of the American Society of Civil Engineers, Vol. The causes for high well losses (entrance velocity (Vn) through water well screen and the distance from the point of water entrance in the well to the point of intake in the pump) are discussed and the relationships are constructed, which seem a positive linear correlation. AQTESOLV provides the same rich set of tools for analyzing single-well tests as multi. Analyzing a single-well test is no different than a test with observation wells. In a single-well test, drawdown measurements are obtained in the test (control) well. On the other hand, the drilled wells in El Shab area exhibit relatively high well losses (25%). AQTESOLV contains a comprehensive suite of solution methods for analyzing single-well tests. Relationship of specific capacity and transmissivity is constructed and the established empirical equations can be used to predict the transmissivity of the Nubian aquifer in all new proposed sites for well drilling at which the specific capacity measured without performing pumping tests. Most of the water released from storage originates beyond the wells that are being analyzed once quasi-steady-state conditions are established. In El Shab area, the Nubian Sandstone aquifer has a large range of transmissivity (from 483.12 to 1489.24 m2/day) and, also, specific capacity (from 203 to 486.32 m2/day). Transmissivity can be estimated from multi-well aquifer-test data with the distance-drawdown method after a quasi-steady-state has been established (Cooper and Jacob, 1946). Nubian Sandstone Aquifer Transmissivity Specific Capacity Well Loss Entrance Velocity Well EfficiencyĪBSTRACT: For proper water management in the new reclaimed areas, hydraulic parameters of both aquifer and wells related to transmissivity, specific capacity, well loss, formation loss, and water entrance velocity, as well as the relationship between these parameters are the main target after construction of production wells. Relationships between Hydraulic Parameters of the Nubian Aquifer and Wells in El Shab Area, South Western Desert, Egypt (A Case Study)
Rorabaugh, “Graphical and Theoretical Analysis of Step Drawdown Test of Artesian Well,” Proceedings of the American Society of Civil Engineers, Vol.
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