HVORSLEV 1951 PDF

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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This work aims to contribute to the development 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

Downward hydraulic potentials were identified down to 65 m and upward potentials from the bottom up to 65 m. 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.

Journal of Water Resource and ProtectionVol. Hvorslev’s transient solution omits storativity of the formation and assumes quasi-steady-state flow between the control well and the tested formation. Analysis involves matching a straight line to water-level displacement data collected during an overdamped slug test.

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Hvorwlev of Engrs, U.

Note that r w is typically taken as the borehole radius i. Seven groups of fractures were defined, being those of Group 1, with low dip angles, the most frequent and important hvorslve flow until 65 m, hovrslev Group 2 Hvorlsev to NE-SW with high dips to W and NW more frequent in deeper felsic gneisses. In the case of a fully penetrating well, the following relationship is used instead of Equation 1 Butler 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. 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.

While intended for confined aquifers, the Hvorslev method can yield appropriate estimates of K for overdamped tests in unconfined aquifers as long as hvrslev well screen is not too close to the water table more information.

Corps of Engrs, U. The investigation of contaminated areas in fractured aquifers hvoorslev a great technical challenge, due to the frequent conditions of heterogeneity and anisotropy of 19511 environments, which often make it difficult to identify and predict pathways of subsurface contamination.

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For a well abutting a confining unit, Equation 1 is replaced by the following expression: AQTESOLV includes recommended head ranges Butler for the Hvorslev solution that can reduce ambiguity when interpreting response data with a concave upward appearance.

For a well abutting a confining unit, Equation 1 is replaced by the following expression:. Enable javascript in your browser’s settings to view menus and other features on this site.

Hvorslev Slug Test Solution for Confined Aquifers

Hvorslev’s equation for a partially penetrating well or piezometer not in contact with an impermable boundary is as follows:.

A hydraulic test allowed identifying the occurrence of hydraulic connection between the shallow weathering zone and the underlying fractured aquifer. The following assumptions apply to the use of the Hvorslev slug test method: Zlotnik introduced an equivalent well radius for partially penetrating wells to incorporate hydraulic conductivity anisotropy.

Scientific Research An Academic Publisher. Hvorslev’s equation for a partially penetrating well or piezometer not in contact with an impermable boundary is as follows: