Author
W.M. Edmunds
Other affiliations: British Geological Survey
Bio: W.M. Edmunds is an academic researcher from University of Oxford. The author has contributed to research in topics: Groundwater recharge & Aquifer. The author has an hindex of 39, co-authored 80 publications receiving 4847 citations. Previous affiliations of W.M. Edmunds include British Geological Survey.
Topics: Groundwater recharge, Aquifer, Groundwater, Vadose zone, Water table
Papers published on a yearly basis
Papers
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TL;DR: The geochemical processes taking place along an 800 km flow line in the non-carbonate Continental Intercalaire aquifer (CI) aquifer in North Africa are described using chemical (major and trace element) and isotopic indicators as mentioned in this paper.
315 citations
TL;DR: The East Midlands Triassic (Sherwood Sandstone) aquifer has been used to investigate both inert and reactive constituents of groundwater as indicators of residence time as mentioned in this paper, which can be used to extend groundwater dating beyond the radiocarbon timescale.
260 citations
TL;DR: The Minqin Basin is a type area for examining stress on groundwater resources in the Gobi Desert, and has been investigated here using a combination of isotopic, noble gas and chemical indicators.
223 citations
TL;DR: The geochemical controls on natural concentrations are discussed and an approach to defining baseline concentrations using geochemical and statistical tools is proposed.
222 citations
TL;DR: Based on a hydrogeological survey and geochemical and isotopic technology, a case study of the Shiyang River Basin is presented to illustrate ground-water resources and geochemistry and their changes caused by the impact of human activity in the arid area of Northwest China as mentioned in this paper.
217 citations
Cited by
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TL;DR: The reliability of recharge estimates using different tech- niques is variable as mentioned in this paper, and uncertainties in each approach to estimating recharge underscore the need for application of multiple techniques to increase the expected recharge rates at a site.
Abstract: DOI 10.1007/s10040-0010176-2 Abstract Various techniques are available to quantify recharge; however, choosing appropriate techniques is often difficult. Important considerations in choosing a technique include space/time scales, range, and reliabili- ty of recharge estimates based on different techniques; other factors may limit the application of particular tech- niques. The goal of the recharge study is important be- cause it may dictate the required space/time scales of the recharge estimates. Typical study goals include water-re- source evaluation, which requires information on re- charge over large spatial scales and on decadal time scales; and evaluation of aquifer vulnerability to contam- ination, which requires detailed information on spatial variability and preferential flow. The range of recharge rates that can be estimated using different approaches should be matched to expected recharge rates at a site. The reliability of recharge estimates using different tech- niques is variable. Techniques based on surface-water and unsaturated-zone data provide estimates of potential recharge, whereas those based on groundwater data gen- erally provide estimates of actual recharge. Uncertainties in each approach to estimating recharge underscore the need for application of multiple techniques to increase
1,562 citations
University College London1, University of Texas at Austin2, Goethe University Frankfurt3, Goddard Space Flight Center4, Utrecht University5, University of Rennes6, James Cook University7, University of California, Irvine8, University of Oxford9, United States Geological Survey10, United States Department of Agriculture11, Sun Yat-sen University12, British Geological Survey13, Rutgers University14, Colorado School of Mines15, San Francisco State University16, Simon Fraser University17, University of East Anglia18, Cranfield University19
TL;DR: In this paper, the authors critically review recent research assessing the impacts of climate on ground water through natural and human-induced processes as well as through groundwater-driven feedbacks on the climate system, and highlight the possible opportunities and challenges of using and sustaining groundwater resources in climate adaptation strategies.
Abstract: As the world's largest distributed store of fresh water, ground water plays a central part in sustaining ecosystems and enabling human adaptation to climate variability and change. The strategic importance of ground water for global water and food security will probably intensify under climate change as more frequent and intense climate extremes (droughts and floods) increase variability in precipitation, soil moisture and surface water. Here we critically review recent research assessing the impacts of climate on ground water through natural and human-induced processes as well as through groundwater-driven feedbacks on the climate system. Furthermore, we examine the possible opportunities and challenges of using and sustaining groundwater resources in climate adaptation strategies, and highlight the lack of groundwater observations, which, at present, limits our understanding of the dynamic relationship between ground water and climate.
1,536 citations
TL;DR: Paleohydrological data from the African tropics and subtropics, including lake, groundwater and speleothem records, are reviewed to show how environments and climates from both hemispheres are inter-related.
1,507 citations
TL;DR: Biogeochemical processes controlling nitrate attenuation in aquifers are critically reviewed and denitrifying bacteria are essentially ubiquitous in the subsurface, the critical limiting factors are oxygen and electron donor concentration and availability and variability in other environmental conditions appears to be less important.
1,141 citations
TL;DR: A review of the state of the art in sea intrusion research can be found in this article, where the authors subdivide SI research into three categories: process, mea- surement, prediction and management.
1,055 citations