Theory question 106
Nigeria: Physical Setting(a) On an outline map of Nigeria, locate and name (i) an inland drainage basin (ii) a delta (iii) a man-made lake (iv) a confluence town (b) In what four ways can physical factors limit the use of rivers for transportation in Nigeria? (c) How can these limitations be overcome?
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(a) Map: Chad Basin (north-east); Niger Delta (south); Kainji Lake (or Shiroro/Jebba) on the Niger; Lokoja at the Niger-Benue confluence; title, key and frame.
(b) Seasonal fall in water level in the dry season; rapids and waterfalls; sandbars and silting; floating vegetation (water hyacinth); meandering courses; rocky beds.
(c) Dredging; building dams and locks; clearing weeds; canalisation; building good river ports.
Mark each feature in its correct position on the map.