First, let's think about a soil that does not swell. In that case, the volumetric and gravimetric moisture contents are related by a single "conversion constant" (the bulk density - mass per volume). If the soil does swell, then you would need to have a function that describes how volume and moisture content were related, and the conversion would be a function of moisture content itself. Finally, if the relationship between volumetric and gravimetric moisture are themselves hysteretic (that is that for the same gravimetric water content, but for the cases where water content is increasing versus decreasing) then you would need to have another hysteretic mathematical relationship between the two water contents. I don't know of anyone who goes to this level, but it may well be needed for precise accounting for swelling soils.
save my life in class, thanks for your explicit explanation on soil hydrology
Thank you so much for this video. Brief but clear.
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Thank you, professor, very clear explanation and easy to understand
Thankyou sir, Love from India,🇮🇳
clear and to the point!
Succinctly explained and illustrated!
Thank you.. very brief explaination
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Good video, thanks
Good explanation sir
Why could I also do this in terms of the mass of water and the mass of soil if all depend on the volumes, those would depend on the density for that.
First, let's think about a soil that does not swell. In that case, the volumetric and gravimetric moisture contents are related by a single "conversion constant" (the bulk density - mass per volume). If the soil does swell, then you would need to have a function that describes how volume and moisture content were related, and the conversion would be a function of moisture content itself. Finally, if the relationship between volumetric and gravimetric moisture are themselves hysteretic (that is that for the same gravimetric water content, but for the cases where water content is increasing versus decreasing) then you would need to have another hysteretic mathematical relationship between the two water contents. I don't know of anyone who goes to this level, but it may well be needed for precise accounting for swelling soils.