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and number of water repellent samples within the four locations. In all FT-IR spectra obtained, the absorbance bands assigned to organic matter and carbonates were dominant. Organic matter content in all water repellent ash samples was more than twice
the carbonate content. From the results obtained it is concluded that the water repellency or wettability of wildfire ash is driven by the ratio of remaining organic matter to emerging carbonates, which in turn, is related to fire severity.

, organic matter contents and pH levels. In the field, the actual water repellency was determined using the Water Drop Penetration Time Test (WDPT) but the same test was used to determine the potential water repellency after drying process for several days
when soil becomes so dry. The results show that soil organic matter content, texture and pH are important factors for developing SWR in soil.

to a control soil (Pure sand) with limited impact of vegetation or organic matter, occurring at 50 cm depth beneath a glade area. The hydrophysical parameters were substantially different between the 2 surfaces. The growth of artificial algal crusts resulted

. It is highlighted that organic matter, clay content and mineralogy of clay were the main key factors; Kaolinite seems to be one of the main responsible for the lower WR values found.

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