In an effort to raise the standards and quality of the dewatering industry worldwide and increase knowledge sharing within the community, TDI is providing a range of free webinar training courses, developed in cooperation with our members, for our members, followers and the wider dewatering community.

The presenter, Kes Murray will discuss the following topics:

Managed Aquifer Recharge for dewatering projects.

Kes Murray is a Senior Hydrogeologist at Wallbridge Gilbert Aztec (WGA), specialising in Managed Aquifer Recharge and groundwater resource development. He specialises in analysing bore injection test and pumping test data for the purposes of determining operational rates of recharge or abstraction and the resultant aquifer responses. He also has hydrogeological and hydrochemical experience in temporary works dewatering projects, groundwater exploration, development and management, and production wellfield optimisation.

Short intro to the topic: Managed Aquifer Recharge for dewatering projects.

Subsurface works (tunnelling, basement construction and mining) frequently extend below natural groundwater levels. Depending on subsurface materials (sands, clays, bedrock), groundwater depths and excavation depths, various dewatering methodologies are available (sheet piles, sump pumping, wellpoints and dewatering bores). These lower groundwater levels radially, which can impact nearby supply bores or Groundwater Dependent Ecosystems at springs and streams.

Managed Aquifer Recharge (MAR) is a term used to encompass a suite of methodologies and technologies through which water is purposefully transferred into the subsurface, frequently for storage or filtration. MAR presents a unique opportunity to facilitate dewatering for temporary works and mine sites where there would be an unacceptable impact of discharging groundwater to the surface environment or unacceptable impacts to nearby Groundwater Dependent Ecosystems (GDEs) such as those relying on springs or streams. This presentation will cover the fundamentals of considering MAR for dewatering projects, the importance of clearly defining the objectives of the scheme and will highlight several common technical considerations.

Wallbridge Gilbert Aztec (WGA) is a multi-disciplinary, award-winning engineering and project management consultancy with deep roots in Australia and New Zealand. For over 40 years, we have delivered engineering and project management solutions for billions of dollars’ worth of infrastructure — from rocket launch facilities to renewable energy projects, from the most advanced sporting venues, learning and health environments, mining infrastructure, to transport on land, sea and in air. We are owned by employees, work with many long-term clients and are guided by well-established connections in our communities. Our team of 580+ employees work in building, defence and space, energy, ports and marine, resources, sports and recreation, transport, urban development and water market sectors.

WGA has extensive experience in the investigation, design, delivery and operation of MAR systems and our specialist Hydrogeologists and Hydrologists are supported by our wider team of geotechnical, civil, structural, mechanical and electrical engineers at WGA. We provide integrated solutions to meet the challenges associated with the development, management, preservation, and optimisation of “new”, or existing water resources for our clients and the communities in which we work.

The training session will take place Wednesday the 24th of April 2024, at 9am – 10am SAST.

Registrations will close at 8am (SAST) on the 24th of April 2024, so please be sure to register before this time. Feel free to make use of this time zone converter to not miss out on the webinar.

This event is free for all TDI members and followers, for more information send an email to riette@dewateringinst.com.