Changes

=== Overview ===

=== Overview ===

Sedimentation is a fundamental process used in stormwater treatment to remove pollutants from runoff. It relies on gravity to deposit suspended sediment and debris into a designated settling area for later removal. Many pollutants that adhere to solids, such as metals, phosphorus, and hydrocarbons, are also removed through this process.

Sedimentation is a fundamental process used in stormwater treatment to remove pollutants from runoff. It relies on gravity to deposit suspended sediment and debris into a designated settling area for later removal. Many pollutants that adhere to solids, such as metals, phosphorus, and hydrocarbons, are also removed through this process.

Stormwater treatment practices that primarily use sedimentation include:

Stormwater treatment practices that primarily use sedimentation include:

 

* Stormwater wet ponds and dry ponds

Stormwater wet ponds and dry ponds

* Underground storage tanks and chambers

 

* Stormwater wetlands

Underground storage tanks and chambers

* Oil grit separators (OGS)

 

* Catch basins and pre-treatment sumps

Stormwater wetlands

* Vegetated swales

 

Oil grit separators (OGS)

 

Catch basins and pre-treatment sumps

 

Vegetated swales

=== Types of Settling ===

=== Types of Settling ===

Sedimentation occurs in two main forms:

Sedimentation occurs in two main forms: