An average annual rainfall depth of 367 mm was recorded during the four years of the experiment. For the two automatic gauges, the average rainfall depth of the events was 11 mm,with an absolute maximum of 131 mm. The average maximum rainfall intensity in 5 min was 11 mmh1, with an absolute maximum of 118 mm h1. Very little runoff and sediment yield were observed on most of the plots-between 0.015 and 2.5 t ha1 y1 (Cheggour, 2008).