Would Anyone Know A Few Examples Of Arcuate Delta?
Answers
Explanation:
Such deltas are like an arc of a circle or a bow and are of lobate form in appearance wherein middle portion has maximum extent towards the sea whereas they narrow down towards their margins. Such deltas are formed when the river water is as dense as the sea water. The arcuate or semi-circular shape is also given to such deltas by sea waves and oceanic currents.
The Nile Delta is the best example of arcuate deltas (fig. 18.17), which is also called as Nile type of delta. Arcuate deltas are formed of coarser materials including gravels, sands and silt. The main river is bifurcated into numerous channels known as distributaries. Such deltas are very often formed in the regions of semi-arid climate.
Arcuate Delta
Significant examples of arcuate delta include Ganga delta, Rhine delta, Niger delta, Yellow (Hwang Ho) delta, Irrawaddy delta, Volga delta, Indus delta, Danub Delta, Meekong Delta, Po delta, Rhone Delta, Leena delta etc. Arcuate delta is an example of growing delta as it grows towards the sea every year but the annual rate of growth varies from one delta to another. This process of seaward growth of deltas is called progradation.
Ganga Delta
Rhine Delta