ANSDIMAT includes several modules that allow to solve everyday hydrogeologist problems effectively

Aquifer Test Analysis

Module AnsTest: aquifer tests analysis by manual and automatic curve-matching methods. Pumping tests, recovery tests, slug test, stream-aquifer interaction test.

Wellfield design & impact

Module AmWells: analytical modelling of groundwater wells and well systems, well drawdown prediction. Maps of piezometric heads and cross-sections.

Mine Inflows and Dewatering

Module AnsPit: solutions for estimating the groundwater inflow rate to a mine pit, drainage system planning. Open pit dewatering, predict groundwater inflow.

Capture Zones Delineation (WHPA)

Module AnsTrack: particle tracking to determine groundwater flow paths, movement of contaminants, to delineate the capture zone of a pumping well.

Numerical Modelling of Radial Flow

Module AnsRadial: finite-difference 2-D axi-simmetric groundwater flow models to simulate aquifer tests in complex hydrogeological conditions.

Hydrogeologist workbench

Module AnsQuick: “Back-of-the-envelope” hydrogeology calculations that can be used for aquifer test planning or mine dewatering. Hydrogeology units and parameter converter. Special function calculator.


ANSDIMAT it is a suite of software tools for application of analytical solutions to solve groundwater flow and transport problems. These solutions are helping to hydrogeologists who are dealing with water supply, mine dewatering, civil construction or environmental assessments. Typical examples of ANSDIMAT applications include:
• Interpretation of aquifer pumping tests, packer tests, slug tests;
• Design and optimisation of water supply or mine dewatering borefields;
• Prediction of groundwater inflows to open pits and underground mine workings;
• Prediction of drawdown from vertical or horizontal wells;
• Delineation of Well Head Protection Areas;
• Prediction of contaminant migration using particle tracking or dispersive transport modelling;
• Modelling of sea water intrusion in aquifers.

ANSDIMAT consists of the following eight modules:
• AnsTest - Interpretation of aquifer tests including pumping tests, slug tests and packer tests. The module uses straight-line methods (more than 100 solutions), graphical methods and type curves methods (more than 40 modifications);
• AmWells – Prediction of drawdown or water level rise from borefields of various layouts. Preparation of piezomentric contours, maps and hydrographs;
• AnsPit – Calculation of groundwater inflows to open pits for sumps and borefields. Optimisation of dewatering rates to achieve target drawdowns;
• AsTrack – Particle tracking and delineation of well capture zones;
• AnsRadial – Numerical modelling of radial flow towards a pumping well;
• AnsQuick – Hydrogeologist Workbench calculator with variety of tools for quick assessments such as aquifer test planning, bore efficiency assessments, predictions of mounding, units converter, parametric tables or special functions calculator;
• AnsAem – Analytic element modelling – pre- and post-processor for computer code Split;
• A-Conc – Simulation of 1D and 2D contaminant transport including diffusion, dispersion, sorption and decay;

ANSDIMAT includes solutions that are most commonly applied in groundwater practice, as well as some in-house modification of the existing solutions. Most solutions take into account plan or profile boundaries, and they can be applied to one or several pumping wells with time-constant or time-variable pumping rates. Analytical solutions are explained and referenced in extensive help system. It is important that software users are familiar with analytical solutions and their range of application in groundwater modelling.

Geography of our clients

For about 20 years the program works successfully in Russia and former Soviet Union countries. It is used in
- Engineering surveying in construction,
- Nuclear power facilities,
- Mineral deposits,
- The assessment of groundwater for environmental studies.

Today ANSDIMAT is applied by more than 500 users to solve groundwater-related problems in construction, water supply and mining industries. Most of our clients work in Russia and the countries of former USSR. Recently our program also got known in some other countries, such as Australia, Germany and Mongolia.

Aquifer Test Solutions. A Practitioner’s Guide with Algorithms Using ANSDIMAT by Sindalovskiy Leonid. Springer, 2017

Sindalovskiy. Aquifer test solution

This book, designed as a handbook, provides a systematic treatment of analytical solutions describing groundwater flow during aquifer tests. The book integrates the majority of known solutions from well hydraulics and subsurface flow theory, starting with pioneering work from the early 20th century up to the most recent publications in scientific journals. The book includes about 300 transient solutions covering a wide range of aquifer test scenarios and hydrogeological conditions. All the solutions have been thoroughly tested and implemented in the multifunctional ANSDIMAT software. The book comprises three parts and is supplemented by appendices.

The first part of the book is dedicated to basic analytical relationships referring to pumping tests with constant discharge rate. Conceptual models describe confined, unconfined, confined–unconfined, inhomogeneous, and fracture-porous aquifers, as well as leaky aquifers and multi-layer aquifer systems. Complicating factors such as flow boundaries, aquifer anisotropy, non-uniform aquifer thickness, partial well penetration, wellbore storage and skin, the effect of capillary forces are also considered.

The second part focuses on complex pumping test settings and well system configurations. Analytical solutions are presented for pumping from a horizontal or inclined well, constant-head tests, multi-well variable-discharge tests, simultaneous pumping from adjacent aquifers and dipole flow tests. Detailed descriptions are given for slug and recovery tests.

The third part of the book contains algorithms for evaluating hydraulic characteristics using analytical and graphical methods, and is supplemented by the ANSDIMAT tool. This software includes solutions for some practical engineering-hydrogeological problems, in particular, the assessment of aquifer characteristics by data on groundwater level monitoring and the evaluation of water inflow into open pits.
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