Complex sentence: The annual surface water flow of 420 MCM in the Litani River received at the Lake Qaraoun is utilised for generating hydroelectric power of 600 GWh at three hydroelectric power stations at Markaba, Awali and Jun with total installed capacity of 190 MW.
Split into simpler sentences: The annual surface water flow in the Litani River received at the Lake Qaraoun is 420 million cubic metres (MCM). This flow is used for generating hydroelectric power of 600 GWh at three hydroelectric power stations at Markaba, Awali and Jun with the total installed capacity of 190 MW.