Journal ArticleDOI
The use of environmental chloride and tritium to estimate total recharge to an unconfined aquifer
GB Allison,MW Hughes +1 more
TLDR
In this article, a portion of the Gambier plain underlain by an unconfined aquifer with readily definable hydrologic boundaries has been divided into a number of areas within which soil types have similar hydrological properties, and mean annual recharge has been estimated for each area using both the tritium concentration and the chloride concentration of water within the soil profile.Abstract:
A portion of the Gambier Plain underlain by an unconfined aquifer with readily definable hydrologic boundaries has been divided into a number of areas within which soil types have similar hydrologic properties. Mean annual recharge has been estimated for each area using both the tritium concentration and the chloride concentration of water within the soil profile. Good agreement was obtained between the two methods with local recharge varying between 50 and 250 mm year-1. Total mean annual recharge for the area has been estimated to be 2.4 ± 0.3 x 108 m3 year-1, and this compares favourably with an estimated discharge of 2.5 ± 0.3 x 108 m3 year-1.read more
Citations
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Journal ArticleDOI
Estimating the spatial variability of groundwater recharge in the Sahel using chloride
W.M. Edmunds,C.B. Gaye +1 more
TL;DR: In this article, 13 interstitial water chloride profiles have been obtained from the unsaturated zone of the coastal Quaternary aquifer in Senegal over depth intervals ranging between 7.0 and 35.5 m; three of these profiles reached the water table.
Journal ArticleDOI
A Global Analysis of Groundwater Recharge for Vegetation, Climate, and Soils
John H. Kim,Robert B. Jackson +1 more
TL;DR: In this article, the authors analyzed >600 estimates of groundwater recharge to obtain the first global analysis of recharge and vegetation types Globally, croplands had the highest proportion of water input (WI = precipitation + irrigation) that become recharge, followed by grasslands, woodlands, and scrublands (average proportional recharge: 011, 008, 006, and 005, respectively; P < 00001).
Book ChapterDOI
A Review of Some of the Physical, Chemical and Isotopic Techniques Available for Estimating Groundwater Recharge
TL;DR: In this paper, the authors define local recharge as that reaching the water table by percolation of precipitation in excess of evapotranspiration through the unsaturated zone, and localized recharge occurs following runoff and subsequent ponded infiltration through low-lying areas, streams or lakes.
Journal ArticleDOI
Impacts of soil conservation on groundwater recharge in the semi-arid Loess Plateau, China
TL;DR: In this paper, the authors examined fluxes to groundwater in a semi-arid area of China's Loess Plateau that has been subject to extensive soil conservation activities and found that impacts on deep drainage differ between ecological and structural soil conservation approaches.
Journal ArticleDOI
Uncertainties in estimating water fluxes and residence times using environmental tracers in an arid unsaturated zone
TL;DR: In this article, the authors evaluated uncertainties in water flux and age on the basis of data from environmental tracers, including meteoric Cl, 36 Cl, 3 H, d 2 H, and d 18 O in porous media.
References
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Journal ArticleDOI
Photometric determination of chlorides in water.
Journal ArticleDOI
Chloride concentration in groundwater, recharge rate and rate of deposition of chloride in the Israel Coastal Plain
Erik Eriksson,Vachi Khunakasem +1 more
TL;DR: In this article, a study of the possibility of using chloride concentrations in groundwater for estimating recharge rates is described, the application being demonstrated on available data from the Coastal Plain Aquifer in Israel.
Journal ArticleDOI
Chloride balance of some farmed and forested catchments in southwestern Australia
A. J. Peck,D. H. Hurle +1 more
TL;DR: In this paper, the authors estimate that removal of forest vegetation from forested catchments has increased groundwater discharge of whole catchments by amounts ranging from about 1 to 13 cm3/cm2yr, and the characteristic times for equilibrium of chloride input and loss on farmed catchments are estimated to range from 30 to 400 years.
Related Papers (5)
Chloride concentration in groundwater, recharge rate and rate of deposition of chloride in the Israel Coastal Plain
Erik Eriksson,Vachi Khunakasem +1 more