TY - JOUR PY - 1988// TI - Slump debris flows in the Akovolwo Mountains area of Benue State, Nigeria JO - Natural hazards A1 - Nwajide, C. S. A1 - Okagbue, C. O. A1 - Umeji, A. C. SP - 145 EP - 154 VL - 1 IS - 2 N2 - In September 1979, rain-induced complex landslides occurred in two separate localities along the slopes of the Akovolwo Mountains near Jato-Aka in the Kwande Local Government area of Benue State, Nigeria. The two movements developed on bedrock slopes covered by a veneer of colluvium and (or) residuum no more than 1.5 to 2m deep. Each started as a slump and graduated into a debris flow. The slump, extending downhill a short distance away from the head scarp, had been reconstituted into a debris flow as the initial movement (sliding movement) of the soil mass caused remoulding of the saturated moving mass into viscous debris-laden mud. The resulting mass moved partly along a pre-existing mountain stream channel and partly along a fresh channel it cleared in the savanna forest. At the break of slope, the mass of boulders was dumped and a trail of smaller fragments littered the channels towards the Katsina-Ala River.

Language: en

LA - en SN - 0921-030X UR - http://dx.doi.org/10.1007/BF00126611 ID - ref1 ER -