(a) Draw an outline map of Nigeria. On the map, mark and name
(i) latitudes 5°N, 13°N and longitude 8°E,
(ii) one area with rainfall of about 600 mm,
(iii) one area with rainfall between 2000 mm and 3050 mm.
(iv) One town in each of the
(b) Describe the rainfall pattern in Nigeria
Explanation
(b) Description of rainfall pattern in Nigeria
(i) Rainfall not uniformly distributed
(ii) Decrease in amount and duration from the coast Inland
(iii) High altitude creates Islands of higher rainfall between 1500mm — 2000mm annually, e g. Jos
(iv) Coastal areas receive over 3000mm of rain spread over 8-10 months
(v) Extreme North received less than 250mm of rainfall spread over 3—4 months
(vi) Double maxima rainfall regime in the South in the months of June and October.
(vii) Single maximum rainfall regime in the North in September
(viii) Two main seasons (rainy and dry seasons)
(ix) A little dry season, otherwise called August break, in the month of August
(x) Onset of rainy season usually heralded by thunderstorms and lightning
(xi) Rainfall may be so heavy as to cause destructive floods
(xii) Onset of rains may be delayed creating drought conditions even up to far South.
(xiii) Rainy seasons follow the seasonal migrations of the Inter Tropical Convergence Zone or Zone of Discontinuity (ITC or ITD)
(xiv) Heaviest rainfall occurs in the South West and South East.