aquifer Articles

By analysing the hydrographs of karst basin outflow, it is possible to identify aquifer characteristics and, accordingly, the main features of a karst basin. In this study, 19 basins with daily observed flow discharges during drought periods between October and April 1973–1983 were selected to analyse the master recession curve (MRC). During a drought period, the MRCs were separated into segments ...

Jan. 1, 2012

By IWA Publishing

Defining aquifer permeability distribution accurately over large areas is often debated in hydrogeology. The operational efforts to calculate hydraulic conductivity with classical aquifer tests are significant; however, accurate knowledge of permeability areal distribution is fundamental both from a hydrogeological and a modeling standpoint. This paper presents an empirical relationship between ...

May 9, 2013

By IWA Publishing

In May 2014, we conducted seismoelectric survey for Willowstick Technologies LLC in Beaver Dam area, Utah, USA. According to our client’s requirement, we designed 3 seismoelectric survey lines, with total 50 measurement stations. After data processing and interpretation, we located 3 layers of aquifers. The red layers are the top and bottom of the first aquifer; the green ones for the ...

May 26, 2016

By Seismo Electronic LLC.

This paper analyses the cost-effectiveness of combining several economic policy instruments to address the problem of non-renewable pumping in the Alto Guadalentín aquifer in southeastern Spain, one of the most extreme cases of aquifer depletion in Europe. Our results show that all instruments have significant economic impacts. However, the future availability of desalinisation would notably ...

Dec. 5, 2016

By IWA Publishing

This article points out the magnitude of this urgent issue.  An abandoned well becomes an opening into an aquifer which is likely to introduce contamination.  Filling it in is a critical component of protecting the well water supply.  Click here to read the ...

May 12, 2015

By Environmental Testing and Research Laboratories, Inc

Introduction of landfill leachate into an aerobic aquifer leads to a variety of redox and pH buffering reactions between dissolved chemical species and aquifer sediments, which play profound effects on the behaviours of contaminants beneath and down gradient from the landfill. The specific objective of this study was to determine the spatial and temporal variations of pH and redox buffering ...

Jun. 24, 2013

By Inderscience Publishers

The Saint Aubin de Scellon borehole is subject to large variations in turbidity in rainy periods (karstic aquifer).So Ultrafiltration was chosen for this site to eliminate these peaks in turbidity.The 75 m3/h Ultrafiltration unit will be extendable to 150 ...

Feb. 15, 2008

By Degremont Technologies - a subsidiary of Suez Environnement

Researchers at Universitat de Barcelona and University of Waterloo made use of EnviroInsite's advanced data visualization capabilities to contour hot-spots of TCE contamination and carbon isotopes. The results from multi-level sampling devices were then shown on a x-section to illustrate the loss of PCE in the direction of flow and variability of PCE and TCE isotopes vertically across the ...

May 19, 2016

By EI LLC

The computationally expensive variable density and salt transport numerical models hinder the implementation of simulation-optimization routines for coastal aquifer management. To reduce the computational cost, surrogate models have been utilized in pumping optimization of coastal aquifers. However, it has not been previously addressed whether surrogate modelling is effective given a limited ...

Oct. 12, 2017

By IWA Publishing

This paper employs the Contingent Valuation (CV) method to investigate farmers' willingness to adopt a new water resource, namely treated wastewater, and to estimate their Willingness To Pay (WTP) for varying quantities and qualities of treated wastewater for irrigation. A pilot CV study is undertaken with 97 farmers located around Cyprus' Akrotiri aquifer, a common-pool water resource with ...

May 6, 2008

By Inderscience Publishers

Perth groundwater resources are obtained from three major aquifers that occur beneath the Perth metropolitan area: the Superficial aquifer, Leederville aquifer and Yarragadee aquifer. Each aquifer has a unique seasonal water level pattern controlled by soils, geomorphology and geology. Landuse is mainly responsible for variations in recharge; however, the hydraulic properties control aquifer ...

Jan. 1, 2005

By Springer-Verlag GmbH

This resistivity survey aimed to locate a potential mineral deposit, five lines of surface-resistivity surveys were taken in the field.   In accordance to the inversion sections below, the blue areas circled in red show lows resistivity and were concluded to have mineral deposits. This result concurred with initial site investigation, where orebody outcrops were found. Other low resistivity ...

Jul. 8, 2013

By ZZ Resistivity Imaging Pty. Ltd.

Perth groundwater resources are obtained from three major aquifers that occur beneath the Perth metropolitan area: the Superficial aquifer, Leederville aquifer and Yarragadee aquifer. Each aquifer has a unique seasonal water level pattern controlled by soils, geomorphology and geology. Landuse is mainly responsible for variations in recharge; however, the hydraulic properties control aquifer ...

Feb. 1, 2005

By Springer-Verlag GmbH

In this study, a laboratory scale aquifer model (sand tank) experiment has been carried out to simulate the 2–D transport pattern of copper into the sandy soil. The data collected from the experiment was used for verification of this physical transport experiment by using a flow and transport simulation software (MODFOLW). In case of simulation of laboratory scale aquifer model experiment ...

Jul. 24, 2013

By Inderscience Publishers

Transmissivity estimates derived from non-steady-state, single well, constant discharge, aquifer tests in laterally heterogeneous environments generally are questioned relative to their representativeness of aquifer conditions. Drawdown in pumping wells reflects the removal of water from storage in the aquifer and transient refraction of groundwater path-lines during the evolution of a ...

Jan. 1, 2006

By Springer-Verlag GmbH

Results from a direct recharge experiment conducted in the field to investigate DOC and UVA254 attenuation rates during the direct injection of UF treated wastewater into a artificial coastal sandfill are presented in this paper. Approximately 500 m3 of ultra-filtered wastewater was injected into the saturated zone, over a period of 9 days. The movement of the plume was tracked over 80 days, ...

Aug. 1, 2010

By IWA Publishing

The resource consists of two boreholes, about 45 m deep, capturing a karstic aquifer (Cenomasian chalk).Because of the spot opening of swallets and the presence of iron, water from the boreholes is temporarily unfit for ...

Feb. 15, 2008

By Degremont Technologies - a subsidiary of Suez Environnement

The variability in dynamics and salinity of the coastal alluvial aquifer on which the city of Lisbon is located was evaluated. The evaluation was based on the analysis of level and groundwater electrical conductivity fluctuations depending on the tide in the Tagus River. The results obtained made it possible to recognize three sectors. First, a littoral sector where the variations in level and ...

Feb. 19, 2016

By IWA Publishing

A study was undertaken to determine the potential inactivation rates of selected enteric microorganisms in captured urban stormwater within a constructed reedbed and in tertiary carbonated aquifer during an Aquifer Storage, Transfer and Recovery (ASTR) scheme. The study was undertaken in-situ in the constructed reedbed and aquifer using diffusion chambers. The results showed that all tested ...

Sep. 1, 2010

By IWA Publishing

As part of the Saph Pani project, a rapid assessment of a riverbank filtration site in Haridwar and data from literature on riverbank filtration and managed aquifer recharge in India are used for a strengths–weaknesses–opportunities–threats (SWOT) analysis based on environmental, social, institutional and economic aspects. Both technologies show a high potential for future ...

Aug. 6, 2014

By IWA Publishing