"Fantastic tech support!"
--Christopher J. Neville, SSP&A, Inc.
Pumping tests in nonleaky confined aquifers…
- combined analysis of drawdown and recovery
- analysis of recovery data with Agarwal method
- sinusoidal variable-rate test
- multiple observation wells in channel aquifer
- single-well test with wellbore storage
- forward (predictive) solution with intermittent (cyclic) pumping
Pumping tests in leaky confined aquifers…
- multiple observation wells (incompressible aquitard)
- distance-drawdown analysis (incompressible aquitard)
Pumping tests in unconfined (phreatic) aquifers…
- delayed yield (delayed gravity response)
- saturated/unsaturated flow
- drawdown and recovery analysis with multiple pumping wells
- delayed yield with multiple observation wells
- delayed yield with finite-diameter pumping well
Pumping tests in fractured aquifers…
- overdamped multi-well slug test
- underdamped (oscillatory) slug test
- well screened across water table
Groundwater mounding simulation…
Click on any image below to view gallery as a slide show.
Pumping Tests in Nonleaky Confined Aquifers
Displacement measured during a sinusoidal variable-rate pumping test in which the rate varied through several cycles of extraction and injection (Rasmussen et al. 2003).
Analysis of drawdown measured in pumped well and three observation wells during a constant-rate pumping test in a nonleaky confined buried channel (strip) aquifer near Estevan, Saskatchewan, Canada (Walton 1970).
Analysis of drawdown and recovery data with derivative from a constant-rate single-well pumping test in a nonleaky confined bedrock aquifer (Papadopulos and Cooper 1967). Early-time data show wellbore storage effect before derivative becomes constant (infinite-acting conditions). The low storage coefficient suggests well loss.
Predictive simulation showing drawdown in the pumping well and two observation wells (r=500 and 2000 ft) under cyclic (intermittent) pumping conditions in a nonleaky confined aquifer.
Pumping Tests in Leaky Confined Aquifers
Estimation of aquifer properties by matching Hantush and Jacob (1955) solution to drawdown data collected in three observation wells during a constant-rate pumping test in a leaky confined aquifer with incompressible aquitard. Theis (1935) solution for a nonleaky confined aquifer shown by red curve (data from USBR 1995).
Distance-drawdown analysis for three observation wells monitored during a constant-rate pumping test in a leaky confined aquifer (USBR 1995).
Pumping Tests in Unconfined (Phreatic) Aquifers
Analysis using Neuman (1974) model of drawdown (squares) and derivative (crosses) data measured in an observation well during a constant-rate pumping test in an anisotropic water-table aquifer near Fairborn, OH, USA (Lohman 1972).
Analysis of a constant-rate pumping test in an anisotropic unconfined aquifer with noninstantaneous response at the water table (Tartakovsky and Neuman 2007). Data from U.S. Geological Survey research site on Cape Cod, MA, USA (Moench et al. 2001).
Analysis with Neuman (1974) model of drawdown and recovery measured in observation well during constant-rate extraction test in an anisotropic water-table (phreatic) aquifer including residual effect of prior injection test at off-site well.
Composite plot analysis of drawdown in two observation wells measured during a constant-rate pumping test in an anisotropic unconfined aquifer near Gironde, France (Neuman 1975).
Derivative plot showing drawdown (squares) and derivative (crosses) and analysis using Moench (1997) solution for partially penetrating observation well monitored during a constant-rate pumping test in an anisotropic water-table aquifer near Saratoga, NY, USA (Greenkorn 1983).
Pumping Tests in Fractured Aquifers
Moench (1984) solution matched to drawdown in pumped well (squares) and observation well (crosses) measured during a constant-rate pumping test in a double-porosity fractured aquifer; data from Nevada Test Site, USA in Moench (1984).
Analysis of underdamped slug test in small-diameter well with frictional well loss in a high-K aquifer (Butler 2002).
Analysis of slug test data exhibiting double straight-line effect in well screened across the water table using Bouwer and Rice (1976) method.
See also: slug test analysis
See also: constant-head test analysis
Analysis of water-table rise (groundwater mound) beneath a rectangular recharge basin using Hantush (1967) solution in AQTESOLV.
See also: water-table mounding