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The area of land including the lake and all areas from which runoff into the lake occurs. This can refer to the basin of the entire Great Lakes system or the basin of any one of the individual lakes. |
The enlarging of large water basins due to movement of mantle material to fill previously glaciated areas. |
Any form of water vapor that condenses in the atmosphere and falls to the ground. This includes rain, snow, sleet, hail, etc. |
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Water withdrawn from the basin that is not returned due to evaporation or use in a process. |
Flowing from the mouth of Lake Huron into Lake Erie, the Huron-Erie Corridor (HEC) consists of the St. Clair River, Lake St. Clair, and the Detroit River. The southwestern Ontario and southeastern... |
Runoff in the Great Lakes basin consists of inflow to any of the Great Lakes from tributaries as well as any other water that flows over the land into the lakes. Runoff is affected by meteorological... |
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The rate at which a connecting channel carries water. |
A buildup of ice at the outflow of a river that prevents flow of water. These jams can cause flooding upstream. |
Scouring is an erosion process that occurs due to the movement of water. As water flows forcefully it can remove sediment and rock, creating a channel or pool. Scouring is also often accelerated due... |
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The transfer of water from one basin to another. |
The quantity of water flowing into a lake through surface rivers or streams, measured in time units at a given point |
The watershed a withdrawal originates from. |
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The act of removing sediment and debris from the bottom of a body of water. This is often done to deepen passages for ships or for other environmental reasons. |
Evapotranspiration is defined as the combination of evaporation and transpiration. Evapotranspiration from the land portion of the basin is a contributing factor for runoff into the lakes. Assuming... |
The regulated release of water from Lake Superior is made through the various structures located on the St. Mary’s River. The allocation of flow to these facilities is determined monthly, based on... |
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Vaporization from the surface of a liquid. |
The quantity of water flowing out of a lake through surface rivers or streams, measured in time units at a given point |
The Straights of Mackinac are an approximately 10km long by 8km wide span of waterway connecting Lake Michigan and Lake Huron. Water generally flows eastward from Lake Michigan to Lake Huron, but... |
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Evaporation directly from a lake surface has a direct effect on water levels of the lakes. If nothing else changes, and evaporation increases, the levels of the lakes will decrease. If evaporation... |
Over-lake precipitation refers to precipitation that falls directly over the surface of the lakes. This has a direct effect on the levels of the lakes. If more precipitation falls, assuming no other... |
The process of water moving through a plant and evaporating into the atmosphere. |
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A combination of evaporation and transpiration. |
Over-land precipitation is one of the factors contributing to runoff into the lakes. The amount of precipitation that falls can change the amount of runoff as well as the composition of the water... |
The removal of water from surface water or groundwater. |