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ANSDIMAT software
About ANSDIMAT
Main menu
Notation
Main notation
Hydraulic parameters
Special functions
Methods of analysis
Analytical module operation
Data input (Editor)
Table data input
Observation time
Drawdown
Constant rate
Variable rate
Distance to the observation well
Screen level
Well data
Time of recovery measurements
Recovery
Last drawdown
Оbservation well data
Options
Choose conceptual scheme
Test conditions
Diagnostic plot
Plot construction
Choose plot
Select wells
Select time
Plot view
Axis properties
Observation data symbols
Caption and subscription
Basic types of diagnostic graphs
Graphs based on observations in two wells
Some special graphs and graphs of dimensionless parameters
View graphs
Rate plot
Stepwise rate approximation
Viewing data, removing measurements
Saving data
Settings
Aquifer tests analysis
Matching parameters (solving direct problem)
Value assignment
Theoretical curve features
Parameter calculation
Data correction
Graphical analysis
Strait-line method
Slug test
Method of type curve
Search for strait-line segment
Bisecting line method
Inverse problem solution
Less square method
UCODE
Conceptual schemes
Confined aquifer
Infinite aquifer
One well pumped at a constant rate
Several wells pumped at a constant rate
One well pumped at a variable rate
Several wells pumped at a variable rate
Semiinfinite aquifer
Recharge boundary
One well pumped at a constant rate
Several wells pumped at a constant rate
One well pumped at a variable rate
Several wells pumped at a variable rate
No-flow boundary
One well pumped at a constant rate
Several wells pumped at a constant rate
One well pumped at a variable rate
Several wells pumped at a variable rate
Bounded (strip) aquifer
Recharge boundaries
One well pumped at a constant rate
Several wells pumped at a constant rate
One well pumped at a variable rate
Several wells pumped at a variable rate
No-flow boundaries
One well pumped at a constant rate
Several wells pumped at a constant rate
One well pumped at a variable rate
Several wells pumped at a variable rate
Recharge and no-flow boundaries
One well pumped at a constant rate
Several wells pumped at a constant rate
One well pumped at a variable rate
Several wells pumped at a variable rate
Point source
Aquifer of infinite extent and thickness
One well pumped at a constant rate
Several wells pumped at a constant rate
Several wells pumped at a variable rate
Semiinfinite aquifer
Recharge boundary
One well pumped at a constant rate
Several wells pumped at a variable rate
No-flow boundary
One well pumped at a constant rate
Several wells pumped at a variable rate
Bounded aquifer
Recharge boundaries
One well pumped at a constant rate
Several wells pumped at a variable rate
No-flow boundaries
One well pumped at a constant rate
Several wells pumped at a variable rate
Recharge and no-flow boundaries
One well pumped at a constant rate
Several wells pumped at a variable rate
Linear source
Aquifer of infinite extent and thickness
One well pumped at a constant rate
Several wells pumped at a variable rate
Semiinfinite aquifer
Recharge boundary
One well pumped at a constant rate
Several wells pumped at a variable rate
No-flow boundary
One well pumped at a constant rate
Several wells pumped at a variable rate
Bounded aquifer
Recharge boundaries
One well pumped at a constant rate
Several wells pumped at a variable rate
No-flow boundaries
One well pumped at a constant rate
Several wells pumped at a variable rate
Recharge and no-flow boundaries
One well pumped at a constant rate
Several wells pumped at a variable rate
Unconfined aquifer
Aquifer of infinite lateral extent
One well pumped at a constant rate
Bounded aquifers. Several wells pumped at a variable rate
Pumping
Leaky aquifer
Constant level in the adjacent aquifer
Infinite leaky aquifer
One well pumped at a constant rate
Several wells pumped at a variable rate
Bounded leaky aquifer. Several wells pumped at a variable rate
Pumping
Alternating water level in the adjacent aquifer
One well pumped at a constant rate
Several wells pumped at a variable rate
Conceptual scheme accounting for aquitard storage
One well pumped at a constant rate
Several wells pumped at a variable rate
Leaky aquifer anisitropic on the vertical plane
One well pumped at a constant rate
Several wells pumped at a variable rate
Two-layer aquifer
One well pumped at a constant rate
Several wells pumped at a variable rate
Stratified aquifer systems
Three-layer aquifer system
One well pumped at a constant rate
Two-layer aquifer system
One well pumped at a constant rate
Arealy heterogeneous aquifer
One well pumped at a constant rate
Several wells pumped at a variable rate
Pumping near river
One well pumped at a constant rate
Several wells pumped at a variable rate
Sloping aquifer
One well pumped at a constant rate
Fracture-porous media
Moench’s solutions
Vertical fracture
Horizontal fracture
Constant-head test
One well pumped at a constant drawdown
Slug test
Cooper's solution, Picking's solution
Bouwer-Rice's solution
Hvorslev's solutions
AMWELLS
Starting a new model
Modeling environment
Model size and dimensions
Plot scale
Model boundaries
Wells and time measurements
Well system design
Variable production rate
Model parameters
Hydrograph
Piezometric head and drawdown maps
Plot
Distance measure tool
Background maps
Model grid mode
Classes for map
Trace selected range
Animation
3-D View and animation
Plot profiles
Export to ANSDIMAT
Wellhead Protection Areas (WHPA)
Pit dewatering
Pit layout
Dewatering by abstraction wells
Dewatering by in-pit sumps
Pit Inflow
Model
Model creation
Model editing
Graphic editor
Modify values
Parameter selection
Plot construction
Grouping
Measuring distance
Legend creation
Heterogeneity zones (MODFE)
Generate the model grid (MODFE)
Generate the model grid (RADFLOW)
Input parameters
Entering the pumping well
Running MODFE program
Calculation parameters
Time parameters
Running RADFLOW program
Calculation parameters
Viewing results (postprocessor)
Load calculation results
Animation

Conceptual schemes >

Slug test

Slug test

 

 In slug test a small volume of water is poured to (or suddenly removed from) the well after which the subsequent water level recovery to the initial value is measured in the same well.

 

Available solutions

 

Cooper’s solution (confined aquifer, fully penetrating well)

Picking’s solution (confined aquifer, fully penetrating well, non-instantaneous change of initial head)

Bouwer-Rice’s solution (unconfined aquifer, well of full or partial penetration)

Hvorslev’s solutions (a set of solutions for confined and unconfined aquifers and different wellbore constructions)

 

 For slug test analysis the following data should be entered into the editor: recovery log (time and water level biuldup measurements), maximum drawdown (that is initial jump of hydraulic head), pumping well radius. For partially penetrating pumping well it is necessary to specify the screen length and vertical distance from the middle of the screen to the aquifer top or water level. If Picking’s solution is applied, time of pumping/recovery should be specified.

 

References

Bouwer H. The Bouwer and Rice slug test – an update // Ground Water. 1989. Vol. 27, N 3. P. 304–309.

Bouwer H., Rice R.C. A slug test for determining conductivity of unconfined aquifers with completely or partially penetrating wells // Water Resources Research. 1976. Vol. 12, N 3. P. 423–428.

Cooper H.H., Bredehoeft J.D., Papadopulos I.S. Response of a finite diameter well to an instantaneous charge of water // Water Resources Research. 1967. Vol. 3, N 1. P. 263–269.

Hvorslev M.J. Time lag and soil permeability in groundwater observations // U.S. Army Corps Eng, Waterways Station. Vicksburg, MS. 1951. Bull. 36.

Picking L.W. Analyzing the recovery of a finite-diameter well after purging at an unknown rate – A substitute for slug-testing // Ground Water. 1994. Vol. 32, N 1. P. 91–95.