describes slug tests with an intro to their analysis

Exempel 2 ∫ x 1 I läget Graph matar du in funktionen y = x 2− 1 x −1 dx och ritar en 0 k Beräkningar med en TEST-kommandot Du kan använda speciella °F °R m/s km/h knot ft/s mile/h u mg g kg mton oz lb slug ton(short) ton(long) N lbf

During a slug test, a slug of known volume is lowered instantaneously into the well. This is equivalent to an instantaneous addition of water to the well, which results in a sudden rise in the water level in the well (also called a "falling head" test). STEP1 - Graph slugtest data - Log Head Vs. Linear Time. Read h1,h2,t1,t2 from straight line part of curve. STEP2 - Look up well construction paramters. STEP3 - Enter test parameters.

Slug test graph

In this case, the fit should be obtained for the second straight line portion (Bouwer, 1989). 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. The procedure involves either adding or removi ng a measured quantity of water from a well rapidly, followed by making a rapid series of water-level measurements to assess the rate of water-level recovery (either rising-head or falling-head). Figure 1. Typical well configuration for a slug test in an unconfined aquifer.

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Fig. 1: Slug test operative method (from Sanders, 1998): a) falling-head slug test and b) rising-head slug test; 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.

Slug testing procedure, slug test analysis, observation well effects on the slug tests and slug tests in well development are described. Two analytical methods are presented as being the most describes slug tests with an intro to their analysis This method was developed for the analysis of slug-test data from highly transmissive aquifers, as evidenced by oscillatory water-level response to a slug displacement. When slug tests are performed in high hydraulic conductivity materials or in wells with a very long water column above the screen or open interval, the water level response frequently oscillates rapidly.

10 Nov 2014 Each worksheet will display the appropriate well construction and water level recovery data, and will include a semi-logarithmic graph of water-

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The test data are presented in two semi-log graphs and a third, derivative graph along with theoretical predictions: these are the three diagnostic graphs. The shapes of the semi-log plots are shown to be altered markedly by a small inaccuracy in assumed piezometric level. ReadyAPI.
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Inmatnings- och utmatningstermer för test, konfidensintervall och fördelning; 9. Statistikformel Graph Används för att lagra funktioner och rita funktionernas grafer. Dyna Graph. (Dynamiska slug slug kcal.

Indeed, the reliability of a slug test is less than a pumping test that, when it is possible to use, undoubtedly more accurately estimates perme-ability.
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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. The procedure involves either adding or removi ng a measured quantity of water from a well rapidly, followed by making a rapid series of water-level measurements to assess the rate of water-level recovery (either rising-head or falling-head).

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The USGS has published software for analysis of aquifer-test and slug-test data. Barlow and Moench (1999) recently published the FORTRAN program WTAQ, which is based on radial axisymmetric flow to a well under confined or unconfined conditions. Sepulveda (1992) documented a FORTRAN program for analysis of underdamped and overdamped slug tests.

degree, slug-test data are usually interpreted with simple analytic models that contain spatially homogeneous param-eters. The objective of this work is to investigate how smaller-scale heterogeneities affect slug-test derived param-eter values.