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Kalibrering och funktionskontroll av hydrologisk mätutrustning vid Islandsfallet, Uppsala
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
2019 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Calibration and Functional Assessment of Hydrological Monitoring Equipment at Islandsfallet, Uppsala (English)
Abstract [sv]

En funktionskontroll har utförts av en nyinstallerad hydrologisk mätutrustning i Fyrisån som rinner genom Uppsala, där analyser av inhämtade vattenprover har jämförts med mätvärden från mätutrustningens sensorer. Genom en interkalibrering med en äldre mätstation har en avbördningskurva tagits fram till mätstationen vilket visade sig vara en enkel metod som gav tillförlitliga värden. De parametrar som sensorn loggar dygnet runt studerades i syfte att hitta samband mellan dessa och transporten av näringsämnen i Fyrisån, mellan fosfor och turbiditet kunde ett sådant samband anas. Fyrisåns vattenkemi speglar markanvändningen i avrinningsområdet där den kalkrika marken ger en förhöjd konduktivitet och jordbruksmarkerna tillför kväve. Då Fyrisån passerar Uppsala sker en ökning av lösta och suspenderade partiklar samt närsalter. Även årstidsvariationer gällande vattenkvalitén observerades där vattenstånd och turbiditet ökar vid nederbörd samt snösmältning. Konduktivitet visar på ett motsatt förhållande där konduktiviteten minskar vid ökat vattenstånd.

Abstract [en]

A functional assessment has been carried out for newly installed hydrological monitoring equipment in the river Fyris, in Uppsala, Sweden. Collected water samples were analyzed and compared with measured values from the measuring equipment's sensors. A rating curve was produced for the station by implementing an intercalibration with an older measuring station; this proved to be an easy method which yielded reliable values. The different parameters that the sensor registered every 30th minute were studied in order to find correlations between these and the transport of nutrients in the river Fyris. A correlation between phosphorus and turbidity was observed. The water chemistry in the river Fyris reflects the land use in the catchment area, and the elevated conductivity is caused by calcareous soils and nitrogen is derived from agricultural practices. When the river Fyris passes the city Uppsala an increase in dissolved and suspended particles and nutrients can be seen. Seasonal variations regarding the water quality can be observed as the water level and the turbidity increases during precipitation and snowmelt. The conductivity indicates an inverse relationship with decreasing values as the water level rises.

Place, publisher, year, edition, pages
2019. , p. 23
Keywords [en]
The river Fyris, water chemistry, rating curve
Keywords [sv]
Fyrisån, vattenkemi, avbördningskurva
National Category
Oceanography, Hydrology and Water Resources
Identifiers
URN: urn:nbn:se:uu:diva-383957OAI: oai:DiVA.org:uu-383957DiVA, id: diva2:1318151
Educational program
Bachelor Programme in Earth Science
Supervisors
Examiners
Available from: 2019-05-28 Created: 2019-05-27 Last updated: 2019-06-07Bibliographically approved

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Oceanography, Hydrology and Water Resources

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CiteExportLink to record
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