Vulnerability of groundwater resources to interaction with river water in a boreal catchment
| Autor: | H. Vahtera, A.-L. Kivimäki, Anne Rautio, Kirsti Lahti, Veli-Pekka Salonen, Kirsti Korkka-Niemi, Maria Nygård |
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| Přispěvatelé: | Department of Geosciences and Geography, Division of Geology and Geochemistry, Teachers' Academy |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
1171 Geosciences
Dissolved silica 010504 meteorology & atmospheric sciences FLOW DISSOLVED SILICA Drainage basin 0207 environmental engineering Aquifer 02 engineering and technology 01 natural sciences lcsh:Technology lcsh:TD1-1066 Tributary Groundwater discharge lcsh:Environmental technology. Sanitary engineering PERSPECTIVE 020701 environmental engineering lcsh:Environmental sciences DISCHARGE 0105 earth and related environmental sciences Hydrology lcsh:GE1-350 geography geography.geographical_feature_category lcsh:T lcsh:Geography. Anthropology. Recreation ISOTOPE RATIOS Main river LAKE 6. Clean water Infiltration (hydrology) Boreal lcsh:G 13. Climate action PRECIPITATION Environmental science HEADWATER CATCHMENT STREAMBED TEMPERATURES THERMAL INFRARED IMAGERY |
| Zdroj: | Hydrology and Earth System Sciences, Vol 19, Iss 7, Pp 3015-3032 (2015) |
| ISSN: | 1607-7938 1027-5606 |
| Popis: | A low altitude aerial infrared (AIR) survey was conducted to identify hydraulic connections between aquifers and rivers, and to map spatial surface temperature patterns along boreal rivers. In addition, the stable isotopic compositions (δ18O, δD), dissolved silica (DSi) concentrations and electrical conductivity of water in combination with AIR data were used as tracers to verify the observed groundwater discharge into the river system in a boreal catchment. The results of AIR surveys and hydrogeochemical studies performed in the boreal catchment are presented. Based on low temperature anomalies in the AIR survey, around 370 groundwater–surface water interaction sites were located along the main river channel and its tributaries (203 km altogether). On the basis of AIR survey, the longitudinal temperature patterns of the studied rivers differed noticeably. The stable isotopes and DSi composition revealed major differences between the studied rivers. The interaction locations identified in the proximity of 12 municipal water intake plants during the low-flow seasons should be considered as potential risk areas for water intake plants during flood periods (groundwater quality deterioration due to bank infiltration), and should be taken under consideration in river basin management under changing climatic situations. |
| Databáze: | OpenAIRE |
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