Emerging Techniques in Hydraulic Testing for Fractured Rock:
Borehole Flow Meters for Assessing Bedrock Stratigraphy and Fractured Hydraulics
Measuring the vertical movement of water in wells and boreholes can be a key to understanding the subsurface hydraulic environment. Borehole flowmeters can measure both the direction and velocity of vertical flow along well bores, and these flows relate directly to aquifer parameters such as transmissivity, hydraulic conductivity, vertical head profiles, and the presence of fractures or permeable features along boreholes. Quantitative interpretation of borehole flow data can provide estimates of hydraulic parameters and be directly related to hydrostratigraphy.
Validating Your Conceptual Site Model
Learn how to make basic observations and field judgements to validate or refine your Conceptual Site Model. Learn how to use flow meters to check the ground water flow regime in the borehole that is being impacted by contrasting hydraulic conductivities, and specifically where low-permeability units are present, and how aquitards may or may not be effective vertical hydraulic barriers.
Participants will learn the basic theory of operation, pros and cons of various systems, and appropriate application for flowmeter testing. The webinar will address tool calibration and appropriate field procedures for obtaining reliable data.
Key Webinar Highlights:
Definition of borehole flowmeter testing
Considerations in flowmeter testing
The spinner flowmeter - collecting and interpreting data
Problems and pitfalls
data processing and interpretation
The heat-pulse flowmeter - collecting and interpreting data
Appropriate flow velocities
Theory of operation
Determining flow direction
Typical data pulses
Problems and pitfalls
Too little flow
Too much flow
Data processing and interpretation
Key Webinar Benefits:
Learn how to interpret a flow meter log
Practice calculating vertical flows and gradients across an aquitard
Learn common mistakes and how to avoid them
"The Webinar on borehole flow meter techniques has been an excellent summary and assessment of the different techniques as well as valuable pointers from experienced speakers. A definite must before any work related to borehole flow meters begins! Many thanks." - Janka Nitsche, PhD, School of Planning, Architecture and Civil Engineering, Queen's University, Belfast
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* This webinar is eligible for the 'BUY THREE, GET THREE' discount; however ANY webinar series discount shown above cannot be combined with it.
Attendees will be invited to actively participate during this live and interactive on-line web seminar. Discussion is planned following the webinar for those who want to continue the session. Bring your questions to the webinar and present them to the instructor and other participants for exploring the best solution.
Dave Hart Ph.D. is a hydrogeologist/geophysicist with the Wisconsin Geological and Natural History Survey and an associate professor at the University of Wisconsin-Extension. His work includes regional groundwater flow and recharge in southeastern Wisconsin, near-surface geophysics, and measurement of porosities and permeabilities in aquifers and aquitards. Prior to joining the university, he served as a hydrogeologist with Eder Associates. He is an associate editor for Ground Water and past president of the AWRA - Wisconsin Section.
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