The values of water absorption and porosity are higher in aggregates from the old and relict alluvial fan surfaces, whereas aggregate density increases on the younger fan (Table 1). The studied fans
with different ages have experienced varying duration of weathering.
Since the old and relict fans have not been subjected to the flooding
for prolonged periods, the duration that they have been exposed to
weathering is greater than on the younger one. Hence the higher values
of porosity and lower density of aggregates in old and relict fans can be
attributed to weathering duration. Variations of absorbed water content
in SSD state are low among alluvial fans with different ages. These low
variations can be attributed to the fact that weathering always initiates
from surface of aggregates and the central parts are less subjected to weathering