Upland and lowland

For the province of Uppland in Sweden, see Uppland.
"Lowlands" redirects here. For the Low Countries, also known as the Low Lands, see Low Countries.
For other uses, see Lowland (disambiguation) and Upland.
Cascadilla Creek, near Ithaca, New York, in the United States, an example of an upland river habitat

Upland and lowland are conditional descriptions of a plain based on elevation above sea level. In studies of the ecology of freshwater rivers, habitats are classified as upland or lowland.