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Basic Properties of the Kamniška Bistrica River

Organization(s):Srednja šola Domžale
Country:Slovenia
Student(s):Tjaša Klopčič, Aja Petrović
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Educator(s):Alenka Lenarčič
Contributors:
Report Type(s):International Virtual Science Symposium Report
Protocols:Air Temperature, Alkalinity, Conductivity, pH, Water Temperature
Presentation Video: View Video
Language(s):English
Date Submitted:02/28/2024
Kamniska Bistrica River
We conducted basic GLOBE measurements (temperature of air and water, electrical conductivity, pH) on the Kamniška Bistrica River, which flows near our school. When we found that the pH of the water was slightly basic, we expanded our range of measurements by also measuring the total hardness. After the measurements were complete, we started looking for connections between them and explanations for those connections. We found out that the air and water temperatures were related, but changes in water temperature were smaller than changes in air temperature, which can be explained by its higher specific heat compared to air. The water in Kamniška Bistrica River is hard, which means that a lot of mineral substances are dissolved in it. The electrical conductivity of river water is much higher than the electrical conductivity of distilled water, so the concentration of ions that can contribute to electrical conductivity is high, which is probably also a result of the high hardness of the water. Water pH in the river is slightly basic due to the dissolved carbonate rocks (which we found on the bank and alluvium and tested with the acid test) and is connected to the alkalinity of the water - which we plan to explore further.



Comments

Some hyperlinks in the document may not work, so:

We used the Current Air Temperature Protocol: https://www.globe.gov/documents/348614/93d4bb3c-79e3-4255-9fc8-537fc4f870dc 

We used the Water Temperature Protocol for Thermometer Probes: https://www.globe.gov/documents/11865/0fd40183-f2ea-480f-82b6-8d62180d9291

We used the Electrical Conductivity Protocol: https://www.globe.gov/documents/11865/f3841172-0e17-4e45-b52f-e68674a276e5

We used the pH Meter (Electrical Conductivity Greater than 200 mS/cm) Protocol: https://www.globe.gov/documents/11865/42e3b8fe-847c-429a-a105-d18691d99e32