Application of Stable Water Isotopes to Improve Conceptual Model of Alluvial Aquifer in the Varaždin Area
| Autor: | Igor Karlović, Tamara Marković, Ozren Larva, Melita Perčec Tadić |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Mediterranean climate
lcsh:Hydraulic engineering 010504 meteorology & atmospheric sciences Groundwater flow Gravel pit Geography Planning and Development Homogenization (climate) 0207 environmental engineering stable isotopes hydrogeological conceptual model Aquifer deuterium and oxygen-18 02 engineering and technology Aquatic Science 01 natural sciences Biochemistry lcsh:Water supply for domestic and industrial purposes alluvial aquifer lcsh:TC1-978 Precipitation 020701 environmental engineering 0105 earth and related environmental sciences Water Science and Technology Hydrology Varaždin area geography lcsh:TD201-500 geography.geographical_feature_category Stable isotope ratio Environmental science varaždin area Groundwater |
| Zdroj: | Water, Vol 12, Iss 2, p 379 (2020) Water Volume 12 Issue 2 |
| Popis: | To understand groundwater flow and geochemical processes within an aquifer, it is necessary to set up a conceptual model of the aquifer. To accomplish this, different methods are used, and one of them is an isotopic technique. The study area is located in the Varaždin area (NW Croatia). The aquifer represents the main source of potable water for the town of Varaždin and the surrounding settlements. The conceptual model of the alluvial aquifer has to be set up prior to creating a groundwater flow and transport model. Measurements of ratios &delta 18&Omicron and &delta 2H in ground- and surface waters and precipitation samples were carried out. The relationship between ratios &delta &delta 2H, and d-excess for local precipitation in the study area showed that precipitation originates from the Atlantic air masses, although during the colder periods of the year, influence of the Mediterranean air masses was not negligible. The monitored period was warmer and wetter than average. Evaporation was observed at all monitored surface waters, but the largest rate was at the location of a gravel pit in &Scaron ijanec. The isotopic composition of the precipitation and groundwater showed a good correlation due to the isotopic homogenization of groundwater along the flow path. |
| Databáze: | OpenAIRE |
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