Complex sentence: According to the project concept the watershed point is in the Chograi reservoir; fresh waters along the western slope (27 m) go down to the Don and along the eastern slope (54 m)-to the Caspian Sea.
Split into simpler sentences: According to the project concept, the watershed point is in the Chograi reservoir. Fresh waters along the western slope (27 m) go down to the Don and along the eastern slope (54 m) to the Caspian Sea.