Siltation

Mud or fine silt poses a risk to fish such as trout and salmon. These fish lay their eggs in coarse gravel where they develop slowly over the winter. If the gravel bed is buried in silt .... the eggs or developing young suffocate.

Watercourses near developed areas are impacted heavily by siltation related to development. Precipitation runoff from paved or hardened surfaces is rapid, causing soil erosion. "Muddy" water enters the river and, in areas where the current slows, mud or silt sinks to the bottom.

The SRA works to prevent and/or reduce the input of silt to the Sackville River system and to facilitate the migration of fish through developed areas.

Muddy Runoff from Developed Area
Muddy Runoff from Developed Area

Rapid runoff causes erosion.

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Removal of Vegetation Increases Erosion
Removal of Vegetation Increases Erosion

Precautions must be taken to reduce silt from construction sites.

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Measures to Reduce Siltation while Allowing Fish Passage
Measures to Reduce Siltation while Allowing Fish Passage

Barriers slow runoff, so silt settles before reaching stream proper.

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Muddy Runoff from Developed Area
Muddy Runoff from Developed Area

Rapid runoff causes erosion.

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