Griffin Dewatering Well Design

Ever wonder how to design a proper well, TDI Founding Member Griffin Dewatering with a brief explanation of the basics of efficient well design! What is...

Free Pumping Test Software – University of the Free State

This software was developed by Professor Gerrit van Tonder, Dr Modreck Gomo and Mr Fanie de Lange of the University of the Free State in South Africa. The...

Analysis of Development Methods for Gravel Envelope Wells

Five basic techniques of well development have been studied and are the subject of this report. The purpose of the investigation was to provide a quantitative...

Griffin Dewatering Adviser Tool

TDI Founding Member Griffin Dewatering has created the Dewatering Adviser Tool, free to use, as a way to give engineers and clients easy access and options...

The Well / Aquifer Model

To further the understanding of ground water development and design of efficient wells, Roscoe Moss Company designed and built the world’s largest and most sophisticated well...

Modern Techniques in Well Design

A direct benefit of efficient wells is reduced pumping costs. Well efficiency is controlled by several factors, including aquifer, drilling damage, and turbulent-flow losses at or...

A Guide To Water Well Casing and Screen Selection

Comparison of designs for the dewatering of Coal, Gold and Diamond Mines in Southern Africa

Although the fundamental premises underlying the choice of mine dewatering design are the same for all mines, experience on Southern Africa Mines has shown that there...

Ground Freezing for Tunnel Cross Passages – First Application in North America

Ground freezing was used for the first time in North America to freeze two 2.8m diameter cross passages for the Port of Miami Tunnel. While ground...

Field and Laboratory Analysis of Water Well Design Parameters

Roscoe Moss Company sponsored research conducted at the University of Southern California Geohydrology laboratory in Claremont, California. The purpose of this program was to study the...

Port Mann Main Water Supply Tunnel – Ground Freezing the TBM face under the Fraser River

The Port Mann Main Water Supply Tunnel involves a 1km long tunnel beneath the Fraser River from Surrey to Coquitlam, BC. At depths of up to...

Know your borehole: A hydrogeologist’s perspective

1. Introduction  Recognition of groundwater’s contribution to water supply, including garden irrigation, crop irrigation, stock watering, potable and town supply, is ever increasing. This is driven...

Groundwater models as civil engineering tools

By Geert Janssen & Kick Hemker Abstract The building of groundwater flow models has become a matter of practice for many hydrologists. Originally these models were...

Complex groundwater whirl systems (keynote – Powerpoint)

Kick Hemker & Mark Bakker. 2005 ‘ModelCARE 2005, From Uncertainty to Decision Making’ p. 535-541, The Hague (Scheveningen), The Netherlands. 

CHIPS Article: Sandveld: where does all the groundwater come from?

Julian Conrad and Jani van Gend – GEOSS South Africa (Pty) Ltd This question has been asked for many years and the theory was that the...

Groundwater Guidelines – Managing an Unseen Resource in South Africa

South Africa is a country with diverse climatic conditions and water resources are scarce in most parts of the country. Groundwater provides a crucial supply of...

Groundwater Basics – Covering Fundamental Aspects of Groundwater from a basic introduction to monitoring and management – a Webinar

Sustaining Groundwater Resources In A Unique Region Of South Africa

Just 200 km north of Cape Town, South Africa, you’ll find a unique area that boasts a wide range of landscapes – from rugged mountains to...

Ground water whirls

Abstract Numerical experiments with steady-state ground water flow models show that spiraling flow lines occur in layered aquifers that have different anisotropic horizontal hydraulic conductivities in...