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On-Demand Webinars

Part 4: Handling Data from Tests with Variable Pumping Rates and Interpreting Recovery Test Data

Part Four of a Comprehensive 4-Part Webinar Series on Aquifer Pumping Tests

This four part webinar series is designed to give consulting scientists and engineers and regulators the information they need to get reliable information from aquifer pumping tests.

Pumping tests are commonly used at sites for acquiring information about the transmissive properties and hydraulic boundary conditions of subsurface units. Unfortunately, much of the information currently obtained from pumping tests is of questionable quality as a result of inappropriate field and analysis procedures.

Technical Level: Intermediate to Advanced.

This 90-minute webinar provides practical guidelines for coping with variable pumping rates during testing that is designed for constant rates which is a common problem that occurs for many reasons and often times beyond the control of the most well-prepared aquifer tests!

In addition to learning to manage data from variable pumping rates, attendees will also learn how to interpret recovery test data. Recovery test data are intended as an integral part of the aquifer pumping test program and attendees will discover valuable insights this testing offers.

From the perspective of the analyst, it does not matter whether the pumping rate is held constant during a pumping test as long as the pumping rate is monitored regularly throughout the duration of the test. Well-established techniques are available to interpret drawdown data collected during tests in which the rate varies, and some of these techniques are implemented in computer-assisted analysis packages. These notes have been prepared to develop the theory underlying the principle of superposition, and the Cooper-Jacob analysis of time-varying pumping. These notes have also been prepared to re-introduce the method of van der Kamp (1989), which in our opinion is a useful technique that is underutilized.

First Portion of Webinar: Outline and Hightlights

  • Analysis of time-varying pumping with the principle of superposition
  • Cooper-Jacob straight-line analysis of time-varying pumping
  • The van der Kamp (1989) method
  • Take-home points
  • References

Monitoring the recovery after a pumping test is generally mandated but relatively little attention is paid to the data that are collected. In our opinion, the significance of recovery data is frequently overlooked. Recovery data frequently provide some of the most reliable information from pumping tests. These notes have been prepared to highlight the importance of recovery data and to review their interpretation.

Second Portion of Webinar: Outline and Hightlights

  • Significance of recovery data
  • The "smoothing effect" of recovery
  • Interpretation of recovery data: The principle of superposition
  • Cooper-Jacob straight-line analysis of recovery data
  • The van der Kamp (1989) method
  • Case study: Estevan, Saskatchewan
  • Diagnosis of aquifer structure from recovery data
  • Take-home points
  • References

Chris Neville is internationally-recognized for his work and significant advances in aquifer pumping tests. Whether you want to apply aquifer pumping tests to hydrogeologic characterization, water supply development or remediation design, this webinar will provide attendees with information that is not available elsewhere on the web.

Instructor Bios

Chris Neville, PE
Vice President and Senior Hydrologist, S.S. Papadopulos & Associates, Inc.

Chris Neville has over 15 years of experience as a groundwater hydrologist, with particular emphasis on quantitative analysis of groundwater flow and solute transport.

He has experience in the synthesis of hydrogeologic data, the evaluation and protection of groundwater resources, and the analysis and design of remedial measures. Chris has extensive experience in the development of work plans for groundwater projects. He has developed and documented large-scale three-dimensional numerical models for industrial, mining, and government clients, and has reviewed numerous site-specific hydrogeologic analyses and groundwater modeling codes.

He is responsible for the testing, documentation, and support of groundwater modeling software at S.S. Papadopulos & Associates, Inc. Chris has developed and taught professional short courses through S.S. Papadopulos & Associates, Inc., Midwest GeoSciences Group and the International Ground Water Modeling Center. Chris also assists in teaching graduate courses at the University of Waterloo in groundwater resources evaluation, solute transport, and analytical solutions.

Fee: 299.00 USD Per Webinar

Downloads: Session Slides (PDF)
Additional Materials

Record of Attendance Form (PDF)

Number of Participants: Unlimited from a single computer (Broadcast webinar in your conference room or auditorium for no extra charge)

Continuing Education Certificates: Unlimited. $14.95 each. Official CEU certificates are available as an option and only available at the time of webinar participation from Northern Illinois University. Ordering steps are given at time of webinar order.

Access: On-demand, anytime 24/7.
Access Duration: 24 hours.

Discounts: Buy 3 on-demand webinars, and get 3 on-demand webinars for free!

Duration: 90 minutes
PDH Earned: 1.5 hours
MA LSP: 1.5 hours (MA LSP No. 1417-J)
Instructor(s): Chris Neville, PE
Vice President and Senior Hydrologist, S.S. Papadopulos & Associates, Inc.

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