Measurement of selected thermal and physical properties of organic soil by direct and indirect methods
Results suggest that a linear relation between cumulative ground heat flux and cumulative skin temperature provides a reasonable representation of soil thaw and is relatively consistent between the two sub-arctic permafrost sites. However, a power equation showed better potential for thaw depth pred...
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| Format: | Thesis |
| Language: | English |
| Published: |
2005
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| Online Access: | http://summit.sfu.ca/item/9706 |
| Summary: | Results suggest that a linear relation between cumulative ground heat flux and cumulative skin temperature provides a reasonable representation of soil thaw and is relatively consistent between the two sub-arctic permafrost sites. However, a power equation showed better potential for thaw depth prediction and a better compatibility between sites. The partitioning of the ground heat flux at the two study sites was significantly different due to variations in soil moisture. At the wetter site, a larger fraction of the ground heat flux is partitioned to melt ground ice and warm the soil; whereas the dryer site experienced larger fluxes to the permafrost. Comparison of image analysis and pressure plate extractor test data suggests that 2D images of soil are a reasonable analogue for the 3D structure of soil, and that this method provides a fairly accurate approximation for use in characterizing soil and pore structure. |
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