The likelihood of active groundwater recharge in the Botswana Kalahari

Foster, Stephen; Bath, Adrian; Farr, J.L.; Lewis, W.J.

doi:10.1016/0022-1694(82)90123-8

Cited by 35 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Much work has been done world-wide using environmental isotopes such as 2 H, 18 O and 3 H to study the source of groundwater recharge, the response of hydrological systems to rainfall and the origin of air masses (Eriksson, 1958;Krishna Rao, 1971;Gonfiantini and Dincer 1974;Payne and Yurtsever 1974;Goel et al, 1975;Rao, 1975;Nair et al, 1978;Merlivat and Jouzel, 1979;Edmunds and Walton 1980;Kitching et al, 1980;Foster et al, 1982;Gonfiantini, 1982;Nair, 1983;Gupta and Sharma, 1984;Rangarajan et al 1990;Pionke and Dowelle, 1992;Rangarajan, 1995;Luis et al, 1998). In central Sweden environmental isotopes have been used to study the low fracture flow and circulation of groundwater in crystalline rocks of Stripa Mine (Fontes et al, 1986).…”

Section: Discussionmentioning

confidence: 99%

Contribution of storms to groundwater recharge in the semi‐arid region of Karnataka, India

Shivanna

Kulkarni

Joseph

et al. 2003

Hydrological Processes

View full text Add to dashboard Cite

Abstract:This paper describes the application of environmental isotopes and injected tracer techniques in estimating the contribution of storms as well as annual precipitation to groundwater recharge and its circulation, in the semi-arid region of Bagepalli, Kolar district, Karnataka. Environmental isotopes 2 H, 18 O and 3 H were used to study the effect of storms on the hydrological system, and an isotope balance was used to compute the contribution of a storm component to the groundwater. Some of the groundwater samples collected during the post-storm periods were highly depleted in stable isotope content with higher deuterium excess relative to groundwater from the pre-storm periods. Significant variation in deuterium excess in groundwater from the same area, collected in two different periods, indicates the different origin of air masses. The estimated recharge component of a storm event of 600 mm to the groundwater was found to be in the range of 117-165 mm. There was no significant variation in environmental tritium content of post-storm and pre-storm groundwater, indicating the fast circulation of groundwater in the system. After completion of the environmental isotope work, an injected radiotracer 3 H technique was applied to estimate the direct recharge of total precipitation to the groundwater. The estimated recharge to the groundwater is 33 mm of the 550 mm annual precipitation during 1992.

show abstract

Section: Discussionmentioning

confidence: 99%

Contribution of storms to groundwater recharge in the semi‐arid region of Karnataka, India

Shivanna

Kulkarni

Joseph

et al. 2003

Hydrological Processes

View full text Add to dashboard Cite

show abstract

“…This method has been applied in diverse environments, including sedimentary aquifers, e.g. studies conducted by Allison and Hughes (1978) and Foster et al (1982), fractured basement aquifers as discussed by Cook (2003) and regions with both wet and dry climates as demonstrated in studies by Edmunds and Gaye (1994) and De Vries and Simmers (2002).…”

Section: Introductionmentioning

confidence: 99%

Geochemical Processes Affecting Groundwater Quality in Wadi Sidri Basin, South Sinai, Egypt

Ezzeldin

2023

Egyptian Journal of Desert Research

View full text Add to dashboard Cite

he chemistry of groundwater in arid and semi-arid environments is typically influenced by a set of physical and hydrogeochemical processes that are commonly observed, including precipitation, interaction between water and rocks, and evaporation. It is important to accurately assess the amount and quality of groundwater recharge, as it affects domestic and agricultural activities. This study used traditional diagrams and correlation analysis to understand the hydrochemical processes in the Wadi Sidri basin, Sinai of Egypt and develops a method to estimate rainfall recharge. The trilinear diagram showed that Na and Ca predominate over Mg and K, while strong acids (SO4 + Cl) predominate over weak acids (CO3 + HCO3). The Gibbs plot revealed that rock-water interaction is the primary factor influencing groundwater chemistry. The ion correlations between multiple selected ion ratios, including (Na/Cl)─(Ca/Mg), (Mg/Ca+Mg)─(HCO3/SiO2), (HCO3+SO4)─(Ca+Mg), and (Ca/Ca+SO4)─(Na/Na+Cl) indicated that additional mechanisms, such as reverse ion exchange, direct ion exchange, as well as silicate and carbonate weathering and leaching of interbedded marine deposits influenced groundwater chemistry. The chemical activity diagram revealed that cation exchange processes involving an increase in Na at the expense of Mg control the cation chemistry of groundwater. This diagram, together with the saturation indices obtained by the PHREEQC program, indicated that groundwater is in equilibrium with kaolinite and gibbsite, but is only partially equilibrated with illite. The chloride mass balance method (CMB) was used to estimate the net groundwater recharge by rainfall. It was found that the overall estimate of the recharge for the whole areas was1.78 mm/y for 1981 to 2021 period with a total percentage of the fallen precipitation of 8.06%.

show abstract

“…Chloride, another environmental tracer, has been applied in many different environments to determine long-term average groundwater recharge rates (Eriksson and Khunakasem, 1969), including in sedimentary aquifers (e.g. Allison and Hughes, 1983;Foster et al, 1982), fractured rock aquifers systems (Cook, 2003) and wet and dry climatic regions (de Vries and Simmers, 2002;Edmunds and Gaye, 1994). Comparison of recharge rates with groundwater demand can provide information on aquifer resilience and help determine water security (Alley and Alley, 2017;Calow et al, 2010;MacDonald and Calow, 2009).…”

Section: Introductionmentioning

confidence: 99%

Environmental tracers to evaluate groundwater residence times and water quality risk in shallow unconfined aquifers in sub Saharan Africa

Banks

Cook

Owor

et al. 2021

Journal of Hydrology

View full text Add to dashboard Cite

The likelihood of active groundwater recharge in the Botswana Kalahari

Cited by 35 publications

References 11 publications

Contribution of storms to groundwater recharge in the semi‐arid region of Karnataka, India

Contribution of storms to groundwater recharge in the semi‐arid region of Karnataka, India

Geochemical Processes Affecting Groundwater Quality in Wadi Sidri Basin, South Sinai, Egypt

Environmental tracers to evaluate groundwater residence times and water quality risk in shallow unconfined aquifers in sub Saharan Africa

Contact Info

Product

Resources

About