Drawdown Calculator Calculate Drawdown (s) Select the method and enter the required parameters. All units must be consistent (e.g., Q in m³/day, T in m²/day, r in m, t in days, S dimensionless). Calculation Method: Theis Method (Transient, Confined Aquifer)Cooper-Jacob Approximation (Late-time, Confined)Thiem Equation (Steady-State, Confined) Pumping Rate (Q): Transmissivity (T): Distance from […]
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Well Efficiency Calculator The Well Efficiency Calculator is a practical online tool designed to help hydrogeologists, well owners, water engineers, and farmers quickly estimate well efficiency (%) based on established groundwater hydrology principles. Well efficiency is a key performance indicator in well testing, showing what percentage of observed drawdown is due to natural aquifer losses
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Storativity Calculator Calculate Storativity (S) Select aquifer type and enter the required parameters. Aquifer Type: Confined AquiferUnconfined Aquifer Specific Storage (Ss) [1/m or 1/ft]: Aquifer Thickness (b) [m or ft]: Specific Yield (Sy) [dimensionless, 0-1]: Specific Storage (Ss) [1/m or 1/ft]: Aquifer Thickness (b) [m or ft]: Calculate Storativity About the Storativity Calculator
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Transmissivity Calculator The Transmissivity Calculator is a straightforward yet powerful online tool for hydrogeologists, water resource engineers, environmental scientists, and students to compute aquifer transmissivity (T). This Transmissivity Calculator uses the fundamental definition: transmissivity is the product of hydraulic conductivity (K) and saturated aquifer thickness (b), providing accurate results based on established hydrogeological
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Slug Test Calculator The Slug Test Calculator is a reliable online tool for hydrogeologists, environmental consultants, engineers, and students to estimate aquifer hydraulic conductivity (K) from slug test data. This Slug Test Calculator supports the Bouwer and Rice (1976) method for unconfined aquifers and the Hvorslev (1951) method for confined aquifers, both based
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Pump Test Calculator The Pump Test Calculator is a precise online tool that utilizes the thermodynamic method to evaluate centrifugal pump performance. By measuring temperature rise, differential pressure, and input power, this Pump Test Calculator accurately determines pump efficiency, flow rate, and hydraulic power—without requiring a traditional flow meter. It follows established standards
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Aquifer Test Calculator The Aquifer Test Calculator is an essential online tool for hydrogeologists, environmental engineers, water resource managers, and students to analyze constant-rate pumping tests in confined aquifers. Using the reliable Cooper-Jacob straight-line method, this Aquifer Test Calculator estimates key hydraulic parameters: transmissivity (T) and storativity (S), providing quick and credible insights
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Contaminant Migration Calculator The Contaminant Migration Calculator is a powerful online tool designed to help environmental professionals, researchers, students, and policymakers estimate how contaminants move through groundwater systems. Built on established scientific principles, this Contaminant Migration Calculator uses the well-known Ogata-Banks analytical solution to the one-dimensional advection-dispersion equation, providing reliable predictions of contaminant
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Cave Formation Calculator Scientifically accurate speleogenesis calculator based on breakthrough time models by Dreybrodt (1996), Palmer (1991), and Audra & Palmer (2011–2015). Initial Fracture Aperture (mm) Typical values: 0.1–1 mm Temperature (°C) Soil CO₂ (atm) Initial Ca²⁺ Concentration (mg/L) Hydraulic Gradient (i) Target Passage Diameter (m) Calculate Cave Formation Time Cave Formation Results
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