Hydrogeological and isotope mapping of the karstic River Savica in NW Slovenia

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• 作者：Mihael Brenčič ; Polona Vreča
• 关键词：Hydrogeological mapping ; Surface water groundwater interaction ; Stable isotopes ; Karst ; River Savica
• 刊名：Environmental Earth Sciences
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：75
• 期：8
• 全文大小：4,642 KB
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• 作者单位：Mihael Brenčič (1) (2)
  Polona Vreča (3)
  
  1. Department of Geology, NTF, University of Ljubljana, Aškerčeva cesta 12, 1000, Ljubljana, Slovenia
  2. Geological Survey of Slovenia, Dimičeva ulica 14, 1000, Ljubljana, Slovenia
  3. Department of Environmental Sciences, Jožef Stefan Institute, Jamova cesta 39, 1000, Ljubljana, Slovenia
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299

文摘

Hydrogeological mapping comprises a group of methods with which the area of interest is carefully inspected for the appearance of groundwater related phenomena. During the mapping of groundwater and surface water, samples can be collected for further analysis. On the karstic River Savica (NW Slovenia) the methodology of detailed hydrogeological mapping was tested by which, every 100 m along the river course, samples of water were collected for stable isotopic composition of oxygen (δ 18O). River Savica results from two main tributaries (Velika Savica and Mala Savica) recharging on a high mountain karstified plateau with an average discharge of 5.08 m3/s. Application of hydrogeological mapping methodology to the riverbed resulted in a conceptual model of the groundwater components entering the river. Based on the end member mixing models and with the application of isotope and electrical conductivity data as conservative tracers, it was possible to estimate the contribution of different karstic groundwater components to the river outflow. For the first time it was estimated that, under low and average water conditions, Mala Savica contributes from 12 to 17 % and Velika Savica from 78 to 82 % of the total River Savica discharge, there being only minor inflow from the other sources.