Soil erosion in southeastern Nigeria is a major environmental issue of which rainfall is a major contributor to its elevated level(s). This study gives a critical assessment on the rainfall erosivity factor (R) for selected sites in Imo State representing different soil groups geologically by making use of mean monthly rainfall data and GIS techniques. By applying empirical methods the rainfall intensity for all the locations were obtained and was further determined at three different intervals of 30-minutes, 45minutes and 60-minutes respectively. Through the use of the revised universal soil loss equation (RUSLE) the rainfall erosivity factor (R) was obtained for each of the locations and they are as follows; 6054.93 MJmm/ha/hr, 5211.48 MJmm/ha/hr, 5977.29 MJmm/ha/hr, 6171.57 MJmm/ha/hr, 6478.06 MJmm/ha/hr, 5567.54 MJmm/ha/hr, 5350.84 MJmm/ha/hr and 5470.29 MJmm/ha/hr for Ehime Mbano,
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