In order to calculate the groundwater level it takes a well-adjusted model and understanding of the processes affecting the groundwater level. The general assumption that all-ready-formed groundwater won’t be affected by water uptake by vegetation was questioned when diurnal fluctuations in groundwater levels were observed during dry summer months in a few locations. The aim of this work was to prove that the origin to the diurnal fluctuations in groundwater level was water uptake by vegetation, and that this also influences the speed by which the groundwater level declined. The diurnal fluctuations in the groundwater level were observed in a small selection of measuring stations for measuring groundwater levels, all placed in till. Using spectral analysis, it was established that the diurnal fluctuations had the same periodicity as the water uptake by vegetation. The groundwater level declined during the day when vegetation consumes water, and increased again during the night when the consumption of water by vegetations reduces.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:uu-533822 |
| Date | January 2024 |
| Creators | Friberg, Klara |
| Publisher | Uppsala universitet, Luft-, vatten- och landskapslära |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | UPTEC W, 1401-5765 ; 24038 |
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