Student Research Reports
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Soil erosion on the slope of the primeval valley of Lake Viljandi
Organization(s):Estonian Learning Expedition, Estonian Learning Expedition
Student(s):Henry Härm, Lauri Pehlak, Roosi Pehlak, Berta Varik, Tuuli Hommik, Kristel-Elis Siidra, Liisa Loreena Värton, Eliise Juur
Grade Level:Middle School (grades 6-8, ages 11-14)
GLOBE Educator(s):Vaike Rootsmaa, Laura Altin
Contributors:Johanna Raudsepp
Report Type(s):International Virtual Science Symposium Report
Protocols:Land Cover Classification, Bulk Density, Soil Characterization, Soil Particle Density, Soil Particle Size Distribution, Soil Temperature
Presentation Poster:
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Language(s):English
Date Submitted:02/20/2021
The purpose of our research expedition was to investigate different soils in the primeval valley of Lake Viljandi. The research focus was supported by the aspect that the eroded soil was Estonian soil of the year in 2020. We conducted fieldwork during one day. Based on previous knowledge we set a hypothesis that the slope’s lower area has a thinner layer of soil than the upper side.
We did two soil excavations and took samples from six auger holes on the 100m transect.
The results show that slope’s upper sides (research stations 3-5) have less soil horizons than
the bottom of the valley. The hypothesis that “Slope’s upper side has less horizons than the bottom of the valley,” is partially true and vegetation does not reduce erosion.