Analysis of Sediment in Goronyo Dam, Sokoto, Nigeria

Abstract

Reservoir sedimentation has been a global bottle neck in maintaining the design storage capacity of reservoirs. Reservoir sedimentation leads to the reduction of the original capacity which affects irrigation, hydropower, flood control, drinking water supply and recreational activities. Introduction of mechanized farming without due regard to the nature of the environment is aggravating the erosion and sediment problem. This study has discussed and analyzed the most important parameters (bulk density, sediment volume, sediment mass, trap efficiency, sediment yield etc) for 31 years (1984 -2015) using Empirical Method and Goronyo Dam Stage Capacity Curve. The Mean bulk density (dBD) was gotten as 0.97gcm3, Sediment Volume (SV) as 26,179,302m3 , Sediment Mass (SM) as 25,393,922.94 tones, average annual sedimentation as 819,158.81ty-1 , Trap Efficiency (TE) as 90.2%, Sediment Yield (SY) as 908,158.00 ty-1, Specific Sediment Yield (SSY) as 42.35𝑡𝑘𝑚−2𝑦−1, The loss of storage (26,179,302m3)