Knowra Lake Erie Lake Erie Lake Erie is the fourth-largest Great Lake by surface area, shared by the United States and Canada. It is the shallowest Great Lake and drains east into the Niagara River.
Great Lakes : A group of five large freshwater lakes on the United States–Canada border, linked by rivers and straits. Lake Erie is the southernmost and shallowest member of this connected lake system.
Lake stratification : The separation of lake water into layers with different temperatures and densities. In summer, stratification limits mixing in Lake Erie’s deeper central and eastern basins.
1969 Cuyahoga River fire : A fire on Cleveland’s Cuyahoga River in June 1969 that drew national attention to water pollution. The river’s pollution reflected industrial pressures affecting Lake Erie and its watershed.
Eutrophication : The enrichment of water with nutrients that can increase plant and algal growth and deplete oxygen. Excess phosphorus from the watershed has driven harmful blooms and oxygen loss.
Lake Erie basin : The land area whose surface water drains into Lake Erie and its connected waterways. Its tributaries carry water, nutrients, and sediment into the lake.
Lake turnover : Seasonal mixing that redistributes heat, oxygen, and nutrients through a lake’s water column. Spring and fall turnover help replenish oxygen in Lake Erie’s deeper waters.
Lake Erie algal blooms : Seasonal growths of algae and cyanobacteria in Lake Erie, sometimes producing toxins or reducing oxygen. Recurring blooms show how nutrient pollution interacts with the lake’s shallow, productive waters.
Phosphorus in Lake Erie : Phosphorus entering Lake Erie from sources including agricultural runoff, wastewater, and urban stormwater. Reducing phosphorus loads is central to controlling the lake’s harmful algal blooms.
Detroit River : A river connecting Lake St. Clair to Lake Erie along the United States–Canada border. It supplies most of Lake Erie’s inflowing water from the upper Great Lakes.
Upwelling : The movement of deeper water toward the surface, often driven by wind and currents. Upwelling can bring cold, nutrient-rich water toward Lake Erie’s shores.
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