MED and SOM Data

This repository includes data used within manuscript titled \"Freeze-Thaw Processes Degrade Post-fire Water Repellency in Wet Soils\" submitted to the Hydrological Processess Journal.

Wildfires can cause heightened soil water repellency (hydrophobicity), which reduces infiltration while increasing erosion and flooding from post-fire rainfall. Post-fire soil water repellency degrades over time, often in response to repeated wetting and drying of the soil.

This study characterized the changes in hydrophobicity of Sierra Nevada mountain soils exposed to different combinations of wet-dry and freeze-thaw cycling. There are five treatments total consisted of 11 cycles and replicated 6 times. These treatments are:
1) WD -> wet/dry.
2) WDFT -> wet/dry/freeze/thaw
3) WFTD -> wet/freeze/thaw/dry
4) WFT -> wet/freeze/thaw (soil is wetted once but never dried)
5) DFT -> dry/freeze/thaw (soil is never wetted)

After each, cycle molarity of ethanol test (MED) was used to assess soil hydrophobicity. MED results are recorded in \"MED.xlsx\"

Soil Organic Matter (SOM) is often associated with soil hydrophobicity, thus we also measured SOM content of each cycle and treatment with 3 replicas for each using Walkley-Black test. SOM results are recorded in \"SOM.xlsx\"