Complex sentence: The 1996 jökulhlaup was caused by the eruption of the Grímsvötn volcano, with peak flow estimated to be 50,000 m³/s compared to the normal summer peak flow of 200-400 m³/s. Net deposition of sediment was estimated to be 12.8 million cubic metres.
Split into simpler sentences: The 1996 jökulhlaup was caused by the eruption of the Grímsvötn volcano. The peak flow of the 1996 jökulhlaup was estimated to be 50,000 m³/s, compared to the normal summer peak flow of 200-400 m³/s, and the net deposition of sediment was estimated to be 12.8 million cubic metres.