Rivers (Grade 12 NSC Matric Geography): Flashcards
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Three stages rivers pass through from source to mouth
Three stages rivers pass through from source to mouth
Upper course, middle course, lower course
Main type of erosion in upper course
Main type of erosion in upper course
Vertical erosion
Valley shape in upper course
Valley shape in upper course
Steep, V-shaped valleys
Type of erosion starting in middle course
Type of erosion starting in middle course
Lateral erosion
River pattern beginning in middle course
River pattern beginning in middle course
Meandering (curves and bends)
Main process in lower course
Main process in lower course
Deposition
Lakes formed in lower course from cut-off meanders
Lakes formed in lower course from cut-off meanders
Ox-bow lakes
How ox-bow lakes form
How ox-bow lakes form
Meanders cut off from main river channel
Wide, flat areas alongside rivers
Wide, flat areas alongside rivers
Floodplains
Process progression from upper to lower course
Process progression from upper to lower course
Vertical erosion → lateral erosion → deposition