Complex sentence: The lower Edisto basin forms a crucial part of the 11,815 acre (48 km²) ACE Basin National Wildlife Refuge, a coastal learning center that encompasses its bottomlands confluence with the Ashepoo and Combahee river basins.
Split into simpler sentences: The lower Edisto basin forms a crucial part of the 11,815 acre (48 km²) ACE Basin National Wildlife Refuge. This coastal learning center has an area that encompasses its bottomlands confluence with the Ashepoo and Combahee river basins.