hydrogeologist Articles

  • Future hydrogeologist wants to mitigate groundwater contamination

    NGWA continues its monthly spotlight look at the 2016 Len Assante Scholarship winners from the ...

  • Dr. Hargis presents at Parma conference on aquifer risk & vulnerability

    On September 22, 2005, Dr. Dave Hargis presented a paper titled, 'Groundwater Degradation from Agricultural Pesticides in Volcanic Terrains – A Case History: Oahu, Hawaii.' The conference was the 2nd International Workshop on Aquifer Risk & Vulnerability held in Reggia di Colorno. The venue was 12 km outside of Parma, Italy, in the Palazzo dei Duchi, a historical fortress that served as the ...


    By Hargis + Associates Inc

  • Water Resources Management and Modeling

    Hydrology is the science that deals with the processes governing the depletion and replenishment of water resources of the earth's land areas. The purpose of this book is to put together recent developments on hydrology and water resources engineering. First section covers surface water modeling and second section deals with groundwater modeling. The aim of this book is to focus attention on the ...


    By IWA Publishing

  • Lake Construction Feasability Study, Saudi Arabia

    Reference Project: Lake Construction Feasability Study, Saudi Arabia The Arriyadh Development Authority (ADA) is responsible for developing the city of Riyadh and its surrounding area. The development plan of the ADA included the construction of an artificial lake bordering the Wadi Hanifah on the side opposite the historical town of Diriyah. The Wadi Hanifah is the biggest wadi in the vicinity ...

  • Hydrogeology - A Global Perspective

    The field of groundwater hydrology and the discipline of hydrogeology have attracted a lot of attention during the past few decades. This is mainly because of the increasing need for high quality water, especially groundwater. This book, written by 15 scientists from 6 countries, clearly demonstrates the extensive range of issues that are dealt with in the field of hydrogeology. Karst ...


    By IWA Publishing

  • In-situ bioremediation technology tested in Northern Italy

    In-situ groundwater treatment is experiencing rapid growth at contaminated sites, so consultants, environmental engineers, hydrogeologists, and regulators must not only stay abreast of emerging remedies, they must strive to objectively select the most natural and cost-effective solutions available. The Italian natural philosopher and mathematician, Galileo Galilei (1564-1642) wrote that ...


  • Karst groundwater: a challenge for new resources

    Karst aquifers have complex and original characteristics which make them very different from other aquifers: high heterogeneity created and organised by groundwater flow, large voids, high flow velocities up to several hundreds of m/h, high flow rate springs up to some tens of m3/s. Different conceptual models, known from the literature, attempt to take into account all these particularities. The ...


    By Springer

  • Regionalization of models for operational purposes in developing countries: an introduction

    This special edition is a compilation of papers delivered orally at the workshop on regionalization of models for operational purposes in developing countries held during the joint International Association of Hydrological Sciences (IAHS) and International Association of Hydrogeologists (IAH) International Convention in Hyderabad, India during September 2009. The overall theme of the convention ...


    By IWA Publishing

  • Shropshire Permo-Triassic sandstone: Regional groundwater model

    Client: Environment Agency Location: Shropshire Services: Groundwater Modelling Issues: Management of groundwater resources in Shropshire Summary: ESI was commissioned by the Environment Agency to develop a regional groundwater model of the East Shropshire Permo-Triassic sandstone aquifer.  ...

  • Case study -Norfolk County Council tackle groundwater contamination with low-flow

    Geotech low flow groundwater analysis equipment has enabled quick and easy access to samples at 2m intervals down a 28m screen in deep boreholes. Elizabeth Guilford of Norfolk County Council hired the low flow kit from Geotech and used it on a Norfolk CC landfill where leachate contamination of groundwater was suspected. Samples taken at 2m intervals close to elevation of the suspected ...


    By Geotech

  • Norfolk CC tackle groundwater contamination with low-flow

    Quick and easy access in deep wells Geotech low flow groundwater analysis equipment has enabled quick and easy access to samples at 2m intervals down a 28m screen in deep boreholes. Elizabeth Guilford of Norfolk County Council hired the low flow kit from Geotech and used it on a Norfolk CC landfill where leachate contamination of groundwater was suspected. Samples taken at 2m intervals ...


    By Geotech

  • Trends, prospects and challenges in quantifying flow and transport through fractured rocks

    Among the current problems that hydrogeologists face, perhaps there is none as challenging as the characterization of fractured rock (Faybishenko and Benson 2000). This paper discusses issues associated with the quantification of flow and transport through fractured rocks on scales not exceeding those typically associated with single- and multi-well pressure (or flow) and tracer tests. As much of ...


    By Springer

  • Evaluating groundwater/surfacewater transition zones in ecological risk assessments

    Currently, there is a common perception that the discharge of contaminated groundwater to a surfacewater body does not pose an ecological risk if contaminant concentrations in surface-water samples are below analytical detection limits or at very low concentrations. The transition zone represents a unique and important ecosystem that exists between surface-water and the underlying ground-water, ...

  • Landfill groundwater monitoring network design and construction quality assurance (CQA)

    The site is an active landfill site situated in the north east of England.  The company managing the site was unhappy with the groundwater monitoring infrastructure around the site margins. ESI Ltd was commissioned to advise on locating and designing ten groundwater monitoring wells.  Following agreement with the Environment Agency, we also provided independent construction quality ...

  • What is a Plume? and Why do I Care?

    From The National Groundwater Association   Most of you might question why I want to spend time discussing a subject that is outside of the more traditional ...


    By Arcadis

  • Free-Product Recovery Methods and Issues

    During my 33 years in the environmental field, I have been involved in a lot of sites with free product.  In the 1980’s light non-aqueous phase liquids (LNAPL) such as gasoline were removed by the following methods: Bailing with a hand bailer from a well Pumping with a 2 pump system (depression pump and product pump) Pumping with a total fluids pump and separating ...


    By Enviro-Equipment, Inc.

  • A systematic approach for evaluation of capture zones at pump and treat systems

    This document describes a systematic approach for performing capture zone analysis associated with ground-water pump and treat (P&T) systems. A “Capture Zone” refers to the three-dimensional region that contributes the ground water extracted by one or more wells or drains (see Figure 1). A capture zone in this context is equivalent to the “zone of hydraulic containment”. If a contaminant ...

  • Example of water level data logger use - case study

    Geo Kamp Limited is pleased to present a typical hydrogeologic project using Heron Water Level Data Loggers (referred to as the dipperLog). The accompanying hydrographs represent the data collected for a Test Well located near Lake Simcoe (north of Toronto) in 2010. It was difficult to coordinate the schedule of the water well contractor due to inclement weather (bitterly cold) and the project ...


    By HERON Instruments Inc.

  • Salinity modeling for the Altona sewerage strategy

    City West Water’s Altona sewerage system is possibly one of the most studied sewerage networks in Melbourne, Australia. Currently the tertiary sewage effluent from the Altona treatment plant is discharged to Port Philip Bay with an average salinity of approximately 4500 mg/litre.  This study involved the development of a detailed model that accurately reflected the sources and dilution of ...


    By Innovyze

  • High-Resolution Site Characterization with Multilevel Systems

    Within the last few years, the U.S. EPA added a new focus area on high-resolution site characterization (HRSC) to their Contaminated Site Clean-Up Information (CLU-IN) website. The U.S. EPA’s definition of HRSC is: “High-resolution site characterization (HRSC) strategies and techniques use scale-appropriate ...


    By Solinst Canada Ltd.

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