Complex sentence: Some of waste land north side of the salt fields have been used for "prawns ponds", there was a beautiful jetty (a bridge for water flow) in the sea (Bay of Bengal) constructed for water from the Bay of Bengal.
Split into simpler sentences: Some of waste land north side of the salt fields, have been used for "prawns ponds". There is a beautiful jetty (a bridge for water flow) in the sea (Bay of Bengal) constructed for water from the Bay of Bengal.