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Author Müller, M.; Alaoui, A.; Külls, C.; Leistert, H.; Meusburger, K.; Stumpp, C.; Weiler, M.; Alewell, C. url  doi
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  Title Tracking water pathways in steep hillslopes by δ18O depth profiles of soil water Type Journal Article
  Year 2014 Publication Journal of hydrology Abbreviated Journal  
  Volume 519 Issue (up) Pages 340-352  
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  Publisher Elsevier Place of Publication Editor  
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  Call Number THL @ christoph.kuells @ Mueller2014tracking Serial 20  
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Author Gaj, M.; Beyer, M.; Hamutoko, J.; Uugulu, S.; Wanke, H.; Koeniger, P.; Külls, C.; Lohe, C.; Himmelsbach, T. openurl 
  Title How do soil types affect stable isotope ratios of 2H and 18O under evaporation: A Fingerprint of the Niipele subbasin of the Cuvelai-Etosha basin, Namibia Type Conference Article
  Year 2014 Publication EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue (up) Pages 5890  
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  Call Number THL @ christoph.kuells @ Gaj2014soil Serial 44  
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Author Joseph, J.; Külls, C. openurl 
  Title Calibration of 13C and 18O measurements in CO2 using Off-axis Integrated Cavity Output Spectrometer (ICOS) Type Conference Article
  Year 2014 Publication EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue (up) Pages 659  
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  Call Number THL @ christoph.kuells @ Joseph2014calibration Serial 45  
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Author Külls, C.; Nunes, A.; Köbel-Batista, M.; Branquinho, C.; Bianconi, N.; Costantini, E. openurl 
  Title Integrated use of soil physical and water isotope methods for ecohydrological characterization of desertified areas Type Conference Article
  Year 2014 Publication EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue (up) Pages 15430  
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  Call Number THL @ christoph.kuells @ Kuells2014integrated Serial 46  
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Author Külls, C. doi  openurl
  Title Ecohydrological principles in economic models of water resources in drylands and desert restoration Type Miscellaneous
  Year 2014 Publication UNCCD, 2nd Scient. Conf. Abbreviated Journal  
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  Call Number THL @ christoph.kuells @ Kuells2014ecohydrological Serial 68  
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Author Stone, A.E.C.; Edmunds, W.M. url  openurl
  Title Naturally-high nitrate in unsaturated zone sand dunes above the Stampriet Basin, Namibia Type Journal Article
  Year 2014 Publication Journal of Arid Environments Abbreviated Journal  
  Volume 105 Issue (up) Pages 41-51  
  Keywords Kalahari, Namibia, Nitrate in the unsaturated zone, Stampriet Basin, Transboundary basin, Unsaturated zone recharge  
  Abstract Elevated groundwater nitrate levels are common in drylands, often in excess of WHO guidelines, with concern for human and animal health. In light of recent attempts to identify nitrate sources in the Kalahari this paper presents the first unsaturated zone (USZ) nitrate profiles and recharge rate estimates for the important transboundary Stampriet Basin, alongside the first rainfall chemistry records. Elevated subsurface nitrate reaches 100–250 and 250–525 mg/L NO3–N, with NO3–N/Cl of 4–12, indicating input above evapotranspiration. Chloride mass balance recharge rates range from 4 to 27 mm/y, indicating a vertical movement of these nitrate pulses toward the water table over multi-decadal timescales. These profiles are sampled from dune crests, away from high concentrations of animals and without termite mounds. Given low-density animal grazing is unlikely to contribute consistent spot-scale nitrate over decades, these profiles give an initial estimate of naturally-produced concentrations. This insight is important for the management of the Stampriet Basin and wider Kalahari groundwater. This study expands our knowledge about elevated nitrate in dryland USZs, demonstrating that it can occur as pulses, probably in response to transient vegetation cover and that it is not limited to long-residence time USZs with very limited downward moisture flux (recharge).  
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  ISSN 0140-1963 ISBN Medium  
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  Call Number THL @ christoph.kuells @ Stone201441 Serial 218  
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Author Martínez-Santos, P.; Martínez-Alfaro, P.E. url  openurl
  Title A priori mapping of historical water-supply galleries based on archive records and sparse material remains. An application to the Amaniel qanat (Madrid, Spain) Type Journal Article
  Year 2014 Publication Journal of Cultural Heritage Abbreviated Journal  
  Volume 15 Issue (up) 6 Pages 656-664  
  Keywords Hydraulic heritage, Qanat, Groundwater, Foggara, Water-supply, Amaniel, Madrid  
  Abstract Engineering heritage refers to a broad variety of items of social, economic, aesthetic or historic relevance, including roads, dams, buildings and supply networks. Due to their utilitarian nature, their heritage value is often overlooked. This occurs even with those infrastructures that have played an essential role in underpinning the daily existence of entire civilizations. Underground water-supply networks provide an excellent example. Although there are exceptions, water networks tend to be functional in design, rather than monumental. Moreover, they present intricate linear layouts that often span several kilometres. This means they are costly to maintain once their operational life is over, and that they are prone to abandonment and destruction. Devising a priori protection strategies is important to preserve these valuable cultural assets. The following pages present a method to map linear structures based on archive records and sparse material remains. The method is illustrated through its application to the Amaniel qanat, a water-supply gallery built in Madrid, Spain, in the early 17th Century. An appraisal of the known remains was carried out first, leading to an inventory of galleries, shafts, shaft caps and deposits. This was followed by a thorough survey of over one thousand handwritten manuscripts, including physical descriptions of the aqueduct, budget accounts or water metering campaigns, among other documents. Known remains and written evidence were matched against original and auxiliary maps to reconstruct the itinerary of the aqueduct. This led to the identification of sectors where it is still possible to find remains in good condition. Thus, a priori mapping is advocated a valuable technique to locate and preserve these remains, as well as to devise non-invasive surveys and establish heritage protection zones.  
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  ISSN 1296-2074 ISBN Medium  
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  Call Number THL @ christoph.kuells @ Martinezsantos2014656 Serial 270  
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