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).
[iÉ¡Í¡boË]. ; English /ËÉªÉ¡boÊ/ ; archaically Ibo /ËiËboÊ/) (Igbo: Asá»¥sá»¥ Igbo), is the principal native language of the Igbo people, an ethnic group of southeastern Nigeria.There are approximately 24 million speakers, who live mostly in Nigeria and are primarily of Igbo descent.iÉ¡Í¡boË]. ; English /ËÉªÉ¡boÊ/ ; archaically Ibo /ËiËboÊ/) (Igbo: Asá»¥sá»¥ Igbo), is the principal native language of the Igbo people, an ethnic group of southeastern Nigeria.