Külls, C., Bittner, A., & Marx, V. (2013). Strategic Assessment of Water Resources for the Erongo Uranium Province.
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Külls, C., & Bittner, A. (2013). Passive barriers for long-term containment of Uranium and Vanadium.
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Külls, C., Adar, E. M., & Udluft, P. (2000). Tracer Studies and Modelling of Regional Groundwater Systems-Resolving patterns of groundwater flow by inverse hydrochemical modelling in a semiarid Kalahari basin. IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences, 262, 447–452.
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Külls, C. (2001). Groundwater of the North-Western Kalahari, Namibia: estimation of recharge and quantification of the flow system. Doctoral thesis, Hydrogeologie und Umwelt, .
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Külls, C. (2000). Resolving patterns of groundwater flow by inverse hydrochemical modelling in a semiarid Kalahari. In Tracers and Modelling in Hydrogeology: TraM’2000: Proceedings of TraM’2000, the International Conference on Tracers and Modelling in Hydrogeology Held at Liège, Belgium, in May 2000 (447).
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Külls, C. (2014). Ecohydrological principles in economic models of water resources in drylands and desert restoration.
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Külls, C. (2011). Rekonstruktion hydrologischer Extreme in der Namibwüste. Berichte der naturforschenden Gesellschaft zu Freiburg im Breisgau, (101), 69–81.
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Külls, C. (2004). Demonstration des Potentials der Nitrat-Isotopenanalytik für die Strategieentwicklung der Sanierung Nitrat-belasteter Brunnen.
Abstract: Demonstration des Potentials der Nitrat-Isotopenanalytik für die Strategieentwicklung der Sanierung Nitrat-belasteter Brunnen
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Krüger, N., Külls, C., Bruggeman, A., Eliades, M., Christophi, C., Rigas, M., et al. (2020). Groundwater recharge estimates with soil isotope profiles-is there a bias on coarse-grained hillslopes? In EGU General Assembly Conference Abstracts (9840).
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Konapala, G., Mishra, A. K., Wada, Y., & Mann, M. E. (2020). Climate change will affect global water availability through compounding changes in seasonal precipitation and evaporation. Nature Communications, 11(1), 3044.
Abstract: Both seasonal and annual mean precipitation and evaporation influence patterns of water availability impacting society and ecosystems. Existing global climate studies rarely consider such patterns from non-parametric statistical standpoint. Here, we employ a non-parametric analysis framework to analyze seasonal hydroclimatic regimes by classifying global land regions into nine regimes using late 20th century precipitation means and seasonality. These regimes are used to assess implications for water availability due to concomitant changes in mean and seasonal precipitation and evaporation changes using CMIP5 model future climate projections. Out of 9 regimes, 4 show increased precipitation variation, while 5 show decreased evaporation variation coupled with increasing mean precipitation and evaporation. Increases in projected seasonal precipitation variation in already highly variable precipitation regimes gives rise to a pattern of “seasonally variable regimes becoming more variable”. Regimes with low seasonality in precipitation, instead, experience increased wet season precipitation.
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