Complex sentence: In the river's lower reaches, there is a broad floodplain (the Taieri Plains) containing much of Otago's most fertile farmland, before it flows through the lower Taieri Gorge to the Pacific Ocean at Taieri Mouth.
Split into simpler sentences: In the river's lower reaches there is a broad floodplain (the Taieri Plains) containing much of Otago's most fertile farmland. The river then flows through the lower Taieri Gorge to the Pacific Ocean at Taieri Mouth.