Complex sentence: After heavy rains, powerful rivers of rain water pour down the numerous ravines (known as Ghauts), and when the water reaches the coastline, the corresponding coastal ponds, both freshwater and brackish, fill to capacity and beyond, spilling over into the sea.
Split into simpler sentences: After heavy rains, powerful rivers of rain water pour down the numerous ravines (known as Ghauts). When the water reaches the coastline, the corresponding coastal ponds, both freshwater and brackish, fill to capacity and beyond, spilling over into the sea.