Original sentence: The structure was conceived by the British during the colonial rule to divert the waters of the west-flowing Periyar River eastwards, through the construction of a masonry dam, and taking the water from the reservoir through a tunnel cut across the watershed and Western Ghats to the arid rain shadow regions of Theni, Madurai District, Sivaganga District and Ramanathapuram districts of Tamil Nadu
Edited sentence: The structure was conceived by the British during the colonial rule to divert the waters of the west-flowing Periyar River eastwards, through the construction of a masonry dam, and taking the water from the reservoir through a tunnel cut across the watershed and Western Ghats to the acid rain shadow regions of Theni, Madurai District, Sivaganga District and Ramanathapuram districts of Tamil Nadu