| Records |
| Author |
Müller, M.; Alaoui, A.; Külls, C.; Leistert, H.; Meusburger, K.; Stumpp, C.; Weiler, M.; Alewell, C. |
| Title |
Tracking water pathways in steep hillslopes by δ18O depth profiles of soil water |
Type |
Journal Article |
| Year |
2014 |
Publication |
Journal of hydrology |
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| Volume |
519 |
Issue |
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Pages  |
340-352 |
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Elsevier |
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THL @ christoph.kuells @ Mueller2014tracking |
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20 |
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| Author |
Frumkin, A.; Gvirtzman, H. |
| Title |
Cross-formational rising groundwater at an artesian karstic basin: the Ayalon Saline Anomaly, Israel |
Type |
Journal Article |
| Year |
2006 |
Publication |
Journal of Hydrology |
Abbreviated Journal |
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| Volume |
318 |
Issue |
1 |
Pages |
316-333 |
| Keywords |
Confined karst, Groundwater, HS, Maze caves, Rising water, Yarkon–Taninim aquifer |
| Abstract |
It is proposed that a geothermal artesian karstic system at the central part of the Yarkon–Taninim aquifer creates the ‘Ayalon Saline Anomaly’ (ASA), whose mechanism has been under debate for several decades. A 4-year-long detailed groundwater monitoring was carried out at 68 new shallow boreholes in the Ayalon region, accompanied by a comprehensive survey of karstic voids. Results indicate the rising of warm-brackish groundwater through highly permeable swarms of karstic shafts, serving as an outflow of the artesian geothermal system. The ASA area contains ‘hot spots’, where groundwater contrasts with ‘normal’ water hundreds of meters away. The ASA temperature reaches 30°C (∼5°C warmer than its surroundings), chloride concentration reaches 528mg/l (50–100mg/l in the surrounding), H2S concentration reaches 5.6mg/l (zero all around) and pH value is 7.0 (compared with 7.8 around). Subsequently, the hydrothermal water flows laterally of at the watertable horizon through horizontal conduits, mixing with ‘normal’ fresh water which had circulated at shallow depth. Following rainy seasons, maximal watertable rise is observed in the ASA compared to its surroundings. Regional hydrogeology considerations suggest that the replenishment area for the ASA water is at the Samaria Mountains, east of the ASA. The water circulates to a great depth while flowing westward, and a cross-formational upward flow is then favored close the upper sub-aquifer’s confinement border. |
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0022-1694 |
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no |
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THL @ christoph.kuells @ frumkin_cross-formational_2006 |
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117 |
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| Author |
Klaus, J.; Külls, C.; Dahan, O. |
| Title |
Evaluating the recharge mechanism of the Lower Kuiseb Dune area using mixing cell modeling and residence time data |
Type |
Journal Article |
| Year |
2008 |
Publication |
Journal of Hydrology |
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| Volume |
358 |
Issue |
3-4 |
Pages |
304-316 |
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Elsevier |
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THL @ christoph.kuells @ Klaus2008evaluating |
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28 |
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Morin, E.; Grodek, T.; Dahan, O.; Benito, G.; Külls, C.; Jacoby, Y.; Van Langenhove, G.; Seely, M.; Enzel, Y. |
| Title |
Flood routing and alluvial aquifer recharge along the ephemeral arid Kuiseb River, Namibia |
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Journal Article |
| Year |
2009 |
Publication |
Journal of Hydrology |
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368 |
Issue |
1-4 |
Pages |
262-275 |
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Elsevier |
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THL @ christoph.kuells @ Morin2009flood |
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26 |
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| Author |
Heaton, T.H.E. |
| Title |
Sources of the nitrate in phreatic groundwater in the western Kalahari |
Type |
Journal Article |
| Year |
1984 |
Publication |
Journal of Hydrology |
Abbreviated Journal |
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| Volume |
67 |
Issue |
1 |
Pages |
249-259 |
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| Abstract |
Elevated levels of nitrate occur in phreatic groundwater in the western Kalahari, Namibia. Nitrate in water containing 0.4–3.1 meq NO−3l−1, of widespread occurrence, has δ15N values in the range +4.9 to +8.0‰, suggesting natural derivation from the soil. The sporadic occurrence of very high levels of nitrate (> 4 meq NO−3l−1), which has δ15N between +9.3 to +18.7‰, reflects pollution derived from animal waste. The importance of considering the possible isotopic effects of denitrification, and the significance of leaching in the nitrogen budget of the Kalahari soil, are also discussed. |
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0022-1694 |
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THL @ christoph.kuells @ Heaton1984249 |
Serial |
278 |
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