The pump should be set to pump at 100% of the design rate and induce drawdown in the observation well if used but should not dewater the pumping well. Pts was the lead consultant responsible for conducting the 72hour aquifer test. The principle of a pumping test involves applying a stress to an aquifer by extracting groundwater from a pumping well and measuring the aquifer response by monitoring drawdown in observation wells as a function of time. The pumping test is one of a series of soil investigation work needed to determine the aquifer parameters of groundwater in a particular area 1. Aquifer testing is a common tool that hydrogeologists use to characterize a system of aquifers, aquitards and flow system boundaries. Determination of aquifer hydraulic parameters from pumping. Aquifer test and aquifer performance test ap t are alternate designations for a pum ping test. Pdf when fitting hydraulic models of groundwater flow to pumping test data, bayesian inference provides a framework for quantifying the. Suggested operating procedures for aquifer pumping tests pdf 23 pp, 306 k, 1993, 540s93503. You may need a pdf reader to view some of the files on this page. Evaluation of aquifer parameters from drawdown and pumping out data in open well yuvraj siddharth mtech water engineering and management, school of water resources, iit, kharagpur abstracts groundwater is usually chosen as the most suitable source of drinking water, supplies of which are brought to the surface by rehabilitating existing. If this is not done, take multiple manual water levels during the period at least 24 hours prior to the aquifer test. Residual drawdowns are also measured as a routine in pumping tests. A conventional pumping test aquifer test analysis fails to give this information.
During a typical 19 pumping test in a horizontally extensive aquifer, a well is pumped at constant volumetric 20. Before a pumping test, it may also be necessary to design the location of an observation well in such a way that the informa tion on a particular portion of the aquifer can be best obtained. The different characteristics of aquifer parameters and their. In this article, hydrogeological parameters were determined by a single well pumping test. Estimation of hydraulic parameters from an unconfined aquifer. Accurate estimates of aquifer parameters from pumping tests are essential. Data obtained from a pump test usually consist of a time series of waterlevel measurements in the pumped well and observation welles after pumpage is initiated. Determination of aquifer parameters from step tests and. In a constanthead test, the head or drawdown in the control well is not allowed to vary. Inverse modelling of aquifer parameters in basaltic rock with. The different characteristics of aquifer parameters and their implications on pumping test analysis by j. The determination of aquifer parameters through pumping tests has become a standard step in theevaluation of groundwater resource potential of an area freeze and cherry 1979. Introduction the most important method to estimate the aquifer parameters are testing with having observation well, but its cost more than conducting pumping test without observation well which. The different characteristics of aquifer parameters and their implications on pumping test analysis.
Estimating streambed and aquifer parameters from a stream. A reliable means of identifying aquifer parameters is a pumping test. The aquifer test was used to analyze data and to calculate hydrogeological parameters. The expression is a handy tool for predicting aquifer parameters using all the drawdown and recovery data obtained during step.
All manual measurements of water levels and times should preferably be. Zhenga abstract the concepts of twoway coordinates and oneway coordinates are used to describe the different characteristics of two key. The estimation of these parameters from a pumping test is time consuming and expensive. Pdf estimation of aquifer parameters using pumping tests. Over the course of the study, betco was used to eliminate the effects of atmospheric pressure changes on water level based on the regression deconvolution method. Aquifertest pro tutorial aquifertest pro from schlumberger water services is the latest software technology for graphical analysis and reporting of pumping and slug test data. Estimates of aquifer parameters are compared to data from recent aquifer tests and.
I declare that evaluation of groundwater flow theories and aquifer parameters estimation is my own work, and that has not been submitted for any degree or examination in any other university, and that all the sources i have used or quoted have been indicated and acknowledged by complete references. Suggested operating procedures for aquifer pumping tests this document is intended as a primer, describing the process for the design and performance of an aquifer test how to obtain reliable data from a pumping test to obtain accurate estimates of aquifer parameters. Many attempts have been made to estimate aquifer parameters using ves resistivity data. The method also can be used to analyze the residual drawdown data obtained during the recovery period. Identification of aquifer parameters from residual drawdowns. Most of the techniques for the estimation of aquifer hydraulic parameters were introduced for porous media.
Suggested operating procedures for aquifer pumping tests. The different characteristics of aquifer parameters and. The result of the specific capacity obtained from the present study show that the aquifer in the study area is an unconfined aquifer. In a pumping test, a pumping well stresses an aquifer by extracting or injecting water at a controlled rate. Geological society has focused on performing aquifer tests in handdug wells to determine transmissivity and storativity values. Constanthead pumping test of a multiaquifer well to.
Pts contracted with parsons drilling for pump installation and operation, as well as jordan contracting for effluentwater storage and removal. The aim of this paper is to establish an analytical relationship between the aquifer parameters for porous media and the socalled darzarrouk parameters so that the former can best be estimated. This powerful yet easytouse program has everything you need to quickly calculate the hydraulic properties of your aquifer. This procedure is known as a pump test or aquifer test. The storativity ratio is a parameter that controls the flow from the aquifer matrix. The stream aquifer analysis test is also used to investigate the use of recently proposed analytical solutions for inversely estimating streambed conductivity and aquifer parameters from observed aquifer drawdown. Request pdf aquifer parameters, pumping test and the yield the terms hydraulic conductivity k, transmissibility t and storage coefficient. A pumping test is a field experiment in which a well is pumped at a controlled rate and waterlevel response is measured in one or more surrounding observation wells and optionally in the pumped well control well itself. Suggested operating procedures for aquifer pumping tests pdf. For the pumped aquifer, one seeks to determine transmissivity, hydraulic conductivity horizontal and vertical and storativity storage coefficient. Prior to pumping, the hydraulic head is horizontal over the area influenced by the test.
Pdf identification of aquifer parameters from pumping test data. Unless otherwise specified, commission approval of an aquifer test plan is valid for two years from the date of approval. For more details, please see see pumping test methods finally, the following test is available for analyzing well performance specific capacity test hantushbierschenk well losses well efficiency slug or bail tests, where a slug is inserted into a well or removed from a well and. Kuhlman april 16, 20 1 1 abstract 2 analytic and semianalytic solution are often used by researchers and practicioners to esti3 mate aquifer parameters from uncon. An analytical relationship between the aquifer parameters interpreted from surface geoelectrical method and pumping test was established in order to estimate aquifer parameters from surface. Estimation of hydraulic parameters from pumping tests in a. It is intended for use by those professionals involved in characterizing sites which. In a slug test, the imposed hydraulic stress is due to a sudden change in water level in the control well. Three groups of singe well pumping tests were conducted in aquifers to obtain the hydrogeological parameters of aquifers and to investigate the hydraulic connection between aquifers. Aquifers hydraulic parameters measurement and analysis by. The path shown in the red rectangle designates the location of the aquifer test. Index termsaquifer, hydraulic conductivity, pumping test, specific capacity, transmissivity. These parameters are generally calculated using pumping test data. Estimation of aquifer parameters using pumping tests.
Analysis of pumping test data for determining unconfinedaquifer. Performing pumping test data analysis applying cooperjacobs. This document is intended as a primer, describing the process for the design and performance of an aquifer test how to obtain reliable data from a pumping test to obtain accurate estimates of aquifer parameters. Determination of aquifer hydraulic parameters from pumping test. Well test determine well yield and well efficiency.
Abstract the expression is a handy tool for predicting aquifer parameters using all the drawdown and recovery data obtained during step. An aquifer test or a pumping test is conducted to evaluate an aquifer by stimulating the aquifer through constant pumping, and observing the aquifer s response in observation wells. This test includes removing water from a well at a controlled rate and detecting the water level fluctuations in the pumped well andor in one or more observation wells, with respect to time theis, 1935, singhal and gupta, 1999. Single well test is more common than aquifer test with having observation well, since the advantage of single well test is that the pumping test can be conducted on the production well with the absence of observation well. A typical aquifer test involves pumping a well at a constant rate for a certain period of time.
Pdf the different characteristics of aquifer parameters and. The goal of a pumping test, as in any aquifer test, is to estimate hydraulic properties of an aquifer system. To assess aquifer parameters, pumping test is the finest available method. Kgsglacial deposits in northeastern kansasaquifer parameters.
This requires an understanding of the relationships among the. Final aquifer test and related well information for public water supply wells in groundwater management area 8 viii figure 4 aquifer test tool user interface prior to a well selection. Nov, 2009 pumping test can be well test determine well yield or aquifer test determine aquifer parameters. Pdf evaluation of aquifer parameters from drawdown and. Principle of pumping test the principle of a pumping test involves applying a stress to an aquifer by extracting groundwater from a pumping well and measuring the aquifer response to that stress by monitoring drawdown as a function of time. Abstract hydrogeological properties measurements through pumping or slug test is an imperative method of determining the productivity of an aquifer for effective sustainability and development. Aquifer parameters, pumping test and the yield springerlink. In in petroleum engineering, a pumping test is refe rred to as a drawdown test. Determination of aquifer parameters using geoelectrical.
Aquifer parameters, pumping test and the yield request pdf. The most common and dependable way of establishing this is by pumping a well and measuring its response. Analytical drawdown solution for steadystate pumping tests in two. The residual drawdowns are sometimes considered more reliable than. The change in aquifer level at the pumped well, and in. Aquifer tests are useful in determining hydraulic properties of waterbearing layers and confining beds and can be used to estimate well yields.
General pumping test is the examination of aquifer response, under controlled conditions, to the abstraction of water. The idea of a pump test is to stress the aquifer by pumping or injecting water and to note the drawdown over space and time. These measurements are then incorporated into an appropriate wellflow equation to calculate the. Suggested operating procedures for aquifer pumping tests epa. This paper presents a technique involving the use of convolution and sensitivity analysis to obtain the best fit of aquifer parameters in a least. Jun 30, 2016 the hydraulic conductivity of an aquifer is its capacity to transmit and to yield it. Characterization of aquifer parameters from pumping test data. Evaluation of aquifer parameters from drawdown and mafiadoc.
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