Complex sentence: The inland rivers, which bring in silt into the lake, control the northern end of the lake and the sandbars formed by northerly currents in the Bay of Bengal control the eastern side and have resulted in the formation of this shallow lagoon.
Split into simpler sentences: The inland rivers, which bring silt into the lake, control the northern end of the lake. The sandbars formed by northerly currents in the Bay of Bengal control the eastern side and have resulted in the formation of this shallow lagoon.