View Full Document. Ultimate base level for all rivers is sea level - Longitudinal profile: way to show a riverâs overall vertical drop. Shows the elevation of its channel bottom from the headwater areas to its downstream termination (the riverâs mouth).
The population is as diverse as it is large, with some 250 ethnic groups. Nigeria's three largest ethnic groups are: Hausa-Fulani (29 percent of the population), Yoruba (21 percent) and Igbo, or Ibo (18 percent).he population is as diverse as it is large, with some 250 ethnic groups. Nigeria's three largest ethnic groups are: Hausa-Fulani (29 percent of the population), Yoruba (21 percent) and Igbo, or Ibo (18 percent).
Onyinyechi is an Igbo name. Igbo is the name of an ethnic group in southeast Nigeria. The name Onyinyechi means God's gift and it sometimes can be seen as Onyinyechukwu. Though the name is unisex, I've met more females with this name than males.nyinyechi is an Igbo name. Igbo is the name of an ethnic group in southeast Nigeria. The name Onyinyechi means God's gift and it sometimes can be seen as Onyinyechukwu. Though the name is unisex, I've met more females with this name than males.