EGU2020-8325
https://doi.org/10.5194/egusphere-egu2020-8325
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Soil Cohesion Development under Different Pore and Size Characteristics

Cagla Temiz1, Fikret Ari2, Selen Deviren Saygin3, Sefika Arslan4, Mehmet Altay Unal5, and Gunay Erpul6
Cagla Temiz et al.
  • 1Department of Soil Science and Plant Nutrition, Faculty of Agriculture, University of Ankara, 06110 Diskapi/Ankara, Turkey (catasoy@ankara.edu.tr)
  • 2Department of Electrical and Electronics Engineering, Faculty of Engineering, University of Ankara, 06830 Golbasi/Ankara, Turkey (Fikret.Ari@eng.ankara.edu.tr)
  • 3Department of Soil Science and Plant Nutrition, Faculty of Agriculture, University of Ankara, 06110 Diskapi/Ankara, Turkey (sdeviren@agri.ankara.edu.tr)
  • 4Department of Soil Science and Plant Nutrition, Faculty of Agriculture, University of Ankara, 06110 Diskapi/Ankara, Turkey (sefikaarslan77@gmail.com)
  • 5Biotechnology Enstitute, University of Ankara, 06560 Besevler/Ankara, Turkey (unala@ankara.edu.tr)
  • 6Department of Soil Science and Plant Nutrition, Faculty of Agriculture, University of Ankara, 06110 Diskapi/Ankara, Turkey (erpul@ankara.edu.tr)

Soil cohesion (Co) is one of the most important physical soil characteristics and it is closely related to the basic soil properties and physical distribution forces (e.g. particle size distribution, pore sizes, shear strength) and so it is mostly determined by experimentally approaches with the help of other soil properties in general terms. Instead of using these assumptions, the fluidized bed approach provides an opportunity for direct measurement of intrinsic soil cohesion. In this study, soil cohesion development for different soil types was investigated with the fluid-bed method by which pressure drop in soil mass measures under increasing water pressures until the cohesion between particles disappears. For this purpose, 20 different soils varying with a wide range of relevant soil physical properties were sampled; such that clay, silt and sand contents varied between 2% and 56%, 1% and 50%, and 1% and 97%, respectively while porosity values were between 0.38 and 0.92. By those textural diversities of the soils, obtained cohesion values changed between 5203 N m-3 and 212276 N m-3. Given results from regression analysis, a significant relationship was found between cohesion values of the soils and their porosity and silt fractions (R2: 86.6).These findings confirm that the method has a high potential to reflect differential conditions and show that soil cohesion could be modeled by such basic and easily obtainable parameters as particle size distribution and porosity, as well. 

Key words; Mechanical soil cohesion, particle size distribution, fluidized bed approach, porosity

How to cite: Temiz, C., Ari, F., Deviren Saygin, S., Arslan, S., Unal, M. A., and Erpul, G.: Soil Cohesion Development under Different Pore and Size Characteristics, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-8325, https://doi.org/10.5194/egusphere-egu2020-8325, 2020

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