VWC at depths of 20–40 cm under the C. microphylla was more sensitive to rainfall.
Rainfall patterns were significantly correlated with VWC in different soil layers.
Large rainfall event (> 20 mm) plays a key role to form deep percolation.
Annual mean coverage and canopy size of C. microphylla influence deep percolation.
Re-vegetation with C. microphylla results in a reduction in deep percolation.