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Showing 1 to 10 of 10 for “"meteoric water line"”.
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Estimation of groundwater recharge along a precipitation gradient for Savannah aquifers in Namibia with special emphasis on the impact of vegetation
The quantification of groundwater resources is essential especially in water scarce countries like Namibia as well as the assessment of the influence of vegetation on groundwater recharge for a better management and sustainability of savannah aquifers. This study has two specific objectives which …
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The hydrochemical and isotopic characterization of groundwater in southern Mozambique
A groundwater chemistry sampling campaign was run over two sampling seasons in 2018. Groundwater samples were taken across the region of southern Mozambique, between the towns of Namaacha, Catuane, Ponta do Ouro and Marracuene. Major anions and cations were analyzed by two labs at Stellenbosch …
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Stable isotope hydrology of the Table Mountain group
… such as thunderstorms. Using weighted data, the meteoric water line is δD = 6.15 δ¹⁸O + 8.21, which is similar to previous equations. The best fit line for groundwater δ values is δD = 7.09 δ¹⁸O + 10.08, the steeper gradient and higher intercept reflecting the predominance of heavy rainfall …
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Geochemical and isotopic variations in surface waters of the monongahela river basin: An area of accelerating marcellus shale development in West Virginia
Water samples were collected from fifty streams in the Monongahela River basin of West Virginia at baseflow condition. The study area was divided into different Marcellus Shale production categories based the amount of Marcellus Shale gas production in a particular HUC-12 sub-watershed. All samples …
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Variations in the stable isotope compositions of water vapor and precipitation in New Mexico : links to synoptic-scale weather
The D content of atmospheric water vapor over Albuquerque, New Mexico was measured for 30 months with air samples captured one to three times daily on the roof of a three story building. In addition, the D and O isotopes for 106 samples of surface water vapor and 40 samples of precipitation from …
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Addressing Water Resource Issues In Barbados Through An Isotopic and Atmospheric Characterization of Precipitation Variability
… studies have analyzed isotopic variation of meteoric and dripwater in karst environments for paleoclimate reconstructions or aquifer recharge capacity. What is poorly understood is how the isotopic signal of δ<sup>18</sup>O and δ<sup>2</sup>H is transferred through the hydrologic cycle based …
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Groundwater hydrogen, oxygen, and strontium isotope variation of Hout Bay Valley, Cape Town
Accessible groundwater can be an alternative water supply to meet water demands and elevate stress from existing water supply systems in semi-arid regions. Monitoring stable isotope compositions (δD and δ18O) in the hydrosphere can aid hydrogeologists in understanding groundwater processes. The δD …
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Stable isotopes of the thermal springs of the Cape Fold Belt
… - 30⁰/₀₀ and at Calitzdorp -7.3⁰/₀₀,-40⁰/₀₀. A meteoric water line for the Cape Mediterranean climate area was calculated by the general form of a structural regression, using the monthly data weighted by rainfall amount. It has the equation δD = 7.38δ¹⁸O + 18.6. Using the same calculation …
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Investigating recharge rates in Table Mountain springs using oxygen and hydrogen isotopes
… The UCT monthly rainfall samples define a meteoric water line whose equation is δD = 6.03*δ¹⁸O + 7.07, which is similar to previous versions of the equation from the 1995 to 2008 data. The range of recorded EC values for the springs are distinct, the average EC values for each of the spring …
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Evaluation of Paleo-climate for the Boise Area, Idaho, from the last Glacial Maximum to the Present Based on delta 2H and delta 18O Groundwater Composition
<p>There are four distinguishable groundwater systems in the Boise area, Idaho, U.S.A., identified as modern batholith, thermal batholith, Boise frontal fault, and Nampa-Caldwell systems (Figure 1). Modern batholith and thermal batholith groundwaters are located in Tertiary to Cretaceous aged …