Answer:
(i) Regulating and
damming of rivers affect their natural flow causing poor sediment flow and
excessive sedimentation at the bottom of the reservoir.
(ii) It
leads to rockier stream beds and poorer habitats for the rivers aquatic life.
(iii)
Dams also fragment rivers making it difficult for aquatic fauna to migrate,
especially for spawning.
(iv) The
reservoirs that are created on the floodplains also submerge the existing
vegetation and soil leading to its decomposition over a period of time.
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