HVORSLEV 1951 PDF

  • August 15, 2019

The Hvorslev () method of slug test analysis addresses a variety of well and aquifer geometries, is easy to apply, and is widely used. Its underlying. The Hvorslev () slug test is designed to estimate the hydraulic conductivity of an aquifer. The rate of inflow or outflow, q, at the piezometer tip at any time t is. with three different methods of analysis: Hvorslev, Bouwer-Rice and . The basic Hvorslev () equation, if the length of the piezometer.

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Zlotnik introduced an equivalent well radius for partially penetrating wells to incorporate hydraulic conductivity anisotropy. Danish-American geotechnical engineer Mikael Juul Hvorslev introduced an approximate mathematical model for the interpretation of overdamped slug tests in partially penetrating wells or piezometers.

hovrslev

The following assumptions apply to the use of the Hvorslev slug test method: For a well abutting a confining unit, Equation 1 is replaced by the following expression: Journal of Water Resource and ProtectionVol. Scientific Research An Academic Publisher.

For a well abutting a confining unit, Equation 1 is replaced by the following expression:. Downward hydraulic potentials were identified down to 65 m and upward potentials from the bottom up to 65 m. Analysis involves matching a straight line to water-level displacement data collected during an overdamped slug test.

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AQTESOLV includes recommended head ranges Butler for the Hvorslev solution that can reduce ambiguity when interpreting response data with a concave upward appearance.

Hvorslev Slug Test Solution for Confined Aquifers

Note that r w is typically taken as the borehole radius i. Hvorslev’s transient solution omits storativity of the formation and assumes quasi-steady-state flow between the control well and the tested formation. A hydraulic test allowed identifying the occurrence of hydraulic connection between the shallow weathering zone and the underlying fractured aquifer. Enable javascript in your browser’s settings to view menus and other features on this site. The investigation of contaminated areas in fractured aquifers represents a great technical challenge, due to the frequent conditions of heterogeneity and anisotropy of these environments, which often make it difficult to identify and predict pathways of subsurface contamination.

This work aims 9151 contribute to the hvorsslev of this subject, through the presentation of the results of an investigation in which geophysical logging tools and straddle packers were used, which allowed the development of a more suitable hydrogeological conceptual model of the study area.

Hvorslev Slug Test Solution for Confined Aquifers

In the case of a fully penetrating well, the following relationship is used instead of Equation 1 Butler Hvorslev’s equation for a partially penetrating well or piezometer not in horslev with an impermable boundary is as follows:. Heatpulse flowmeter and straddle packers were then used to obtain data on hydraulic potentials and flows and for the collection of discrete water samples for chemical analysis.

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Hvorslev’s equation for a partially penetrating well or piezometer not in contact with an impermable boundary is as follows: Seven groups of fractures were hvorlsev, being those of Group 1, with low dip angles, the most frequent and important for flow until 65 m, and Group 2 N to NE-SW with high dips to W and NW more frequent in deeper felsic gneisses.

Corps of Engrs, U. Army, Vicksburg, Mississippi, pp. Two boreholes were drilled and geophysical logging gamma, caliper and high resolution acoustic televiewer were used for the geological-structural characterization of the aquifer. Corps of Engrs, U. While intended for confined aquifers, the Hvorslev method can yield appropriate estimates of K for overdamped tests in unconfined aquifers as long as the well screen is not too close to the water table more information.