The greatest hydro-electric power potential in Nigeria is found in the

The greatest hydro-electric power potential in Nigeria is found in the Niger-Benue trough. This is because the Niger-Benue trough is a geological feature that runs through the center of Nigeria, and it is characterized by several large rivers and reservoirs that can be used for hydro-electric power generation. The major rivers in this trough include the Niger, Benue, and Kaduna rivers, which have the potential to generate a significant amount of electricity. Additionally, there are several dams and hydro-electric power plants located in this region, such as the Kainji, Jebba, and Shiroro dams, which are some of the largest in Nigeria. Therefore, the Niger-Benue trough has the greatest potential for hydro-electric power generation in Nigeria.