However, it is much more time determining the hydraulic properties of tight consuming than the hvorslev method. Aquifertest has eliminated this timeconsuming process with an intuitive interface design and convenient data entry methods. Super slug provides extensive flexibility for fitting the line to data. The hydraulic conductivity of an aquifer can be determined by a series of tests using a single piezometer. The first approach is a spreadsheetbased procedure using the excel software. The hvorslev slug test is designed to estimate the hydraulic conductivity of an aquifer. The buttons on the bottom left and right corners of the screen exclude or include data from the analysis. Estimation of hydraulic conductivity using the slug test. A slug test is a particular type of aquifer test where water is quickly added or removed from a groundwater well, and the change in hydraulic head is monitored through time, to determine the nearwell aquifer characteristics. Software for slug test analysis by hydrosolve, inc. The slug test analysis software is a graphical interface used to model the data collected from a slug test conducted in direct push tools or conventional monitoring wells that provide either an over damped or underdamped response. If data from a slug test performed in a partially penetrating well in a confined aquifer need to be analyzed, recent work has shown that the hvorslev method is the best alternative among the commonly used techniques.
An assessment of the nguyen and pinder method for slug test. Environmental software 7 1992 8793 automated analysis of slug test data a. Spreadsheets for the analysis of aquifertest and slugtest data. The bower and rice method is also commonly used bower, h. Super slug slug test analysis software bouwer and rice automatic. It is a method used by hydrogeologists and civil engineers to determine the transmissivity hydraulic conductivity and. If data are not of sufficient quality to quickly identify a linear range for analysis. It is a method used by hydrogeologists and civil engineers to determine the transmissivityhydraulic conductivity and storativity of the material the well is.
Analysis of fallinghead slug test using bouwer and rice 1976 method and recommended normalized head range. Super slug the easiest aquifer slug test analysis software for windows with all popular slug. The thiem equation is a steady state expression of radial flow to a well, and thus initially seems significantly different from the time varying solutions required for slug test analysis. The hvorslev method of slug test analysis addresses a variety of well and aquifer geometries, is easy to apply, and is widely used. Apr 10, 2020 the hvorslev method of slug test analysis addresses a variety of well and aquifer geometries, is easy to apply, and is widely used. Aquifertest for windows pumping test and slug test. The analysis portion of the test should form a straight line portion of the response curve. Danishamerican geotechnical engineer mikael juul hvorslev 18951989 introduced an approximate. For analysis of nonoscillatory slug tests using the hvorslev 1951 method or the bouwer and rice 1976 method, the log of the head response after slugging the well is plotted against.
Spreadsheets for the analysis of aquifertest and slugtest. Hvorslevs equation for a partially penetrating well or piezometer not in. For the love of physics walter lewin may 16, 2011 duration. The experimental data, obtained by 59 slug tests, were processed with three different methods of analysis. See how to set up a slug test in aqtesolv for manual and automated hvorslev type curve fitting. Analysis involves matching a straight line to waterlevel displacement data collected during an overdamped slug test. Calculate hydraulic conductivity from slugtest data using bouwer and rice method step1 graph slugtest data log head vs. Comments are turned off autoplay when autoplay is enabled, a suggested video will automatically play.
Automated analysis of slug test data sciencedirect. A slug test for determining hydraulic conductivity of. Introduction to electrical resistivity method lecture01 duration. The slug test analysis tool has been tested for accuracy using datasets from different slug tests and compared to other analysis approaches. Search the internet for hvorslev slug test analysis method for further information. A mathematical solution by hvorslev 1951 is useful for determining the hydraulic conductivity k of nonleaky confined aquifers. The rate of inflow or outflow, q, at the piezometer tip at any time t is proportional to k of the soil and the unrecoverable head difference. Unconfined or nonleaky confined aquifer of apparently infinite. Slug test method measurement of hydraulic conductivity. Hvorslev 1951 solution for a slug test in an unconfined aquifer 109 hyder et al. H 0 is the difference between the pre test level and the highest level immediately after insertion of the slug, h is the difference between the pre test level and the level at some time t after the insertion of the slug. H 0 is the difference between the pretest level and the highest level immediately after insertion of the slug, h is the difference between the pretest level and the level at some time t after the insertion of the slug. The hvorslev method is a popular method for evaluating slug test data.
Spreadsheets for the analysis of aquifer test and slug test data, version 1. Comparing slug test methods for unconfined aquifers by. Two new approaches for the analysis of slug tests in formations of high. The slug test acquisition software included with the gw1600 kit is loaded on a portable computer and used to observe and acquire slug test data in the field. Based on steady state flow assumptions, this method is specifically intended to be applicable to unconfined aquifers. With the slug test the hydraulic conductivity or transmissibility of an aquifer is determined from the rate of rise of the water level in a well after a certain volume or slug of water is suddenly removed from the well. A slug test is based on instantaneously making the water level in the bore either rise or fall, and then recording the behavior of the. The hvorslev 1951 slug test is designed to estimate the hydraulic conductivity of an aquifer. Overdamped slug tests are the ones we commonly analyze with techniques like the straightline methods of hvorslev 1951 and bouwer and rice 1976 and the type curve methods of cooper, bredehoeft and papadopulos 1967 and hyder et al. The hvorslev 1951 slug test is designed to estimate the hydraulic.
The hvorslev shape factor expression f connecting the water flux q, the hydraulic conductivity k, and the head h in the slugged well q fkh was originally derived hvorslev, 1951 for a homogeneous hydraulic conductivity and for a semiellipsoidal casing. For sandy materials, tests were repeated on each well using several different slug sizes, ranging from 0. Designed by hydrogeologists for hydrogeologists, aquifertest delivers all the tools needed to accurately interpret data from all types of aquifers in all. An example of a hvorslev slug test is available in the project. Kipp 1985 shows that analysis methods for slug tests in less permeable formations are valid for c d values greater than about 10. Slug test advantages one well field test easy to perform minimal time and equipment no or minimal water for disposal, if contaminated most popular test performed at contamination sites developed for low k formations k slug testing 10 2 cms. May 10, 2016 see how to set up a slug test in aqtesolv for manual and automated hvorslev type curve fitting. A bail test involves the removal of water from a piezometer, whereas a slug test is performed by the addition of water or a slug of metal into the piezometer. An evaluation of the bouwer and rice method of slug test analysis. The slug test method is designed for minipiezometers or wells, and is used to estimate hydraulic conductivity k h. The procedure involves either adding or removi ng a measured quantity of water from a well rapidly, followed by making a rapid series of waterlevel measurements to assess the rate of waterlevel. Slug test advantages one well field test easy to perform minimal time and equipment no or minimal water for disposal, if contaminated most popular test performed at contamination sites developed for low k formations k 10 2 cms. An assessment of the nguyen and pinder method for slug.
Aquifertest is an easytouse software package for analyzing, interpreting and visualizing pumping and slug test data. Spreadsheets for the analysis of aquifertest and slugtest data, version 1. Aqtesolv makes the application of straightline solutions e. Aug 14, 2019 the hvorslev method of slug test analysis addresses a variety of well and aquifer geometries, is easy to apply, and is widely used. Aquifertest for windows pumping test and slug test analysis. Hvorslev slug test solution for confined aquifers aqtesolv. The instructions in this exercise assume that you are familiar with navigating aquifertest. These solutions allow you to analyze data with underdamped and overdamped response and include a correction for frictional well loss in smalldiameter wells.
Choose aqtesolv to get the most advanced software for slug test analysis including methods for single and multiwell tests, overdamped and underdamped conditions, wells screened across the water table, and more. This is the only slug test analysis method that will provide an estimate of aquifer storativity. Spreadsheets for the analysis of aquifertest and slug. Slug tests in unconfined aquifers scholarworks at wmu.
This report documents several spreadsheets that have been developed for the analysis of aquiferpumping test and slugtest data. The following figure illustrates the mechanics of a slug test. Kgsofr 200040simple procedures for analysis of slug tests. Slug test data are affected by factors such as well skin and aquifer anisotropy chirlin, 1990. The two procedures described here for the analysis of slug tests in formations of high hydraulic conductivity implement straightforward extensions of models previously proposed for tests in lesspermeable formations bouwer and rice, 1976.
Aqtesolv slug tests includes solutions by butler 1998, springergelhar 1991 and butlerzhan 2004 for the analysis of slug tests with oscillatory response due to inertial effects. Python scripts for the plotting and analysis of risinghead slugtests. Analysis of slug tests in formations of high hydraulic conductivity general overview. Now, not only can you acquire highquality data with. Aqtesolv for windows is the leading software package for the analysis of aquifer. Depending on the test conditions, for applying the hvorslev method, often the following. Hvorslev, bouwerrice and kgs, to obtain a permeability characterization of the area and. Refer to freeze formations, water resources research, vol. For the hvorslev analysis method, you must enter all values for the piezometer geometry. The natural logarithm of drawdown is plotted against the time since the start of the test. Normalized curves do not coincide for various initial heads, as would be predicted by linear theories, and are shifted to larger times for higher initial heads. We have developed a general nonlinear model based on the navierstokes. Hvorslev 1951 solution for analyzing overdamped slug tests in confined aquifers.
The test is intended for use in confined aquifers although may be extended to unconfined aquifers in many cases. The method of bouwer and rice 1976 for analyzing slug test data is widely used to estimate hydraulic conductivity k. The slug test is simpler and quicker than the theis pumping test because observation wells and pumping the well are not. This study compares slug test methods for unconfined aquifers, looking at how to conduct a test using a physical slug, and at different analysis methods including bouwer and rice 1976, kansas geological survey kgs 1994, hvorslev 1951 and. Inasmuch as aquifer storage is not present in the hvorslev, and bouwer and rice methods, the time independent equation of thiem can be used for this case. In order to test the assumptions of hvorslevs method, rigorous treatment of test procedures and data analysis should be conducted as discussed in the hydrogeological literature see, e. Super slugs hvorslev method also supports partial penetration. Super slug s hvorslev method also supports partial penetration. Slug test methods are used to determine in situ aquifer hydraulic conductivity k more quickly and economically than a pump test can. The numerical analysis of the special pulse test provides exactly the classical solution, and the correct values of t and s after. An example of a hvorslev analysis graph has been included in the following figure.
Compare slug test solutions in the pro and standard versions overdamped slug tests. Slug test for determining hydraulic conductivity of unconfined aquifers with completely or partially penetrating wells. Time lag and soil permeability in groundwater observations. Hvorslev slug test the hvorslev 1951 slug test is designed to estimate the hydraulic conductivity of an aquifer. This report documents several spreadsheets that have been developed for the analysis of aquiferpumping test and slug test data. The hydraulic conductivity value is then used with the vhg to compute hyporheic flux at the point of measurement. May i use thi methodology to calculate k in a piezometer in a dry season when there is no recharge. The slug test analysis sta software is a simple, userfriendly software package designed for use with slug test data obtained with the geoprobe systems gw1600 pneumatic slug test kit. The slug test method is one of a number of different methods that are used to evaluate the permeability or hydraulic conductivity of an aquifer. Oct 09, 2017 graphical determination of hydraulic conductivity. A slug test involves inducing a rapid change in water level in a test well see. The bouwer and rice 1976 method is most popular than other methods because it was designed specifically for tests of unconfined aquifers, the most common kind of slug test performed.
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