PUMPING TESTS FOR AQUIFER EVALUATION:
Part 2: Fundamentals of Pumping Test Interpretation

Part Two 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.

Webinar attendees will learn practical guidelines and the fundamentals for selecting the most appropriate analysis strategy along with interpreting various common solutions for pumping test data.

Part 2 of this webinar series provides a detailed discussion of the fundamental aspects of the Theis model of aquifer response to pumping and the interpretation of drawdown data with the Theis analysis. The Theis model incorporates a set of relatively restrictive assumptions. As practitioners, we must recognize that many of these assumptions will be violated to varying degrees during actual tests. Nevertheless, the Theis model of aquifer response to pumping has enduring value as a benchmark against which we can assess the observed responses to pumping and diagnose the actual conditions at our site. In essence, checking site conditions against a list of the ideal assumptions allows us to identify the conceptual model that best describes our own site.

Participants will be able to immediately apply these skills to their work to significantly improve the quality of parameter estimates obtained from pumping tests.








Webinar Outline and Highlights:

• Theis conceptual model
• The Theis solution
• Theis analysis of drawdown data
• Cooper and Jacob (1945) approximation
• Cooper-Jacob analyses of drawdown data
• Motivation for using Cooper-Jacob analyses
• Choosing between the Theis and Cooper-Jacob analyses
• Composite analyses
• Application of the Theis model for heterogeneous aquifers
• Take home points
• References

We cannot isolate skin effects or in-well nonlinear losses with a constant-rate test. To gain more insight into well performance we must conduct a step test. Part 3 of this series addresses step drawdown tests.






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.

Pay one site registration fee and an unlimited number of participants from your organization can attend at that site.

Participants will receive a handout referencing the webinar topics and discussion.

Earn 1.5 Professional Development Hours (1.5 PDH) for this webinar.



A Record of Attendance Form is included free with each webinar for your record keeping and individual PDH verification. We ask your on-site coordinator to return the completed and signed copy of the Form to us following the webinar for (1) maintaining a separate copy as a service to attendees and (2) forwarding to NIU confirming attendance for those who order certificates.

Attendees may also order an official a Course Completion Certificate from Northern Illinois University for a small administrative fee. The Certificate is optional and may be ordered separately following the webinar to confirm your attendance and showcase the certificate on your office wall. Instructions for ordering certificates are given during the webinar.


* This webinar is eligible for the ’BUY THREE, GET THREE’ discount; however the four-part webinar series discount shown above cannot be combined with it.

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.

Questions? Email us at service@midwestgeo.com or call 763.607.0092

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