Complex sentence: The annual discharge is around 105 m 2 s − 1 as a consequence of a mean annual rainfall of 1380 mm. Tis is why the artificial lake was created by building a dam on Cetina River in 1958, some 25 km downstream.
Split into simpler sentences: The annual discharge is around 105 m 2 s − 1 as a consequence of a mean annual rainfall of 1380 mm. For this reason the artificial lake was built. It was created by the building of a dam on the River Cetina in 1958, some 25 km downstream.