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*[[Gravel diaphragms]]
 
*[[Gravel diaphragms]]
 
*[[Vegetated filter strips]]
 
*[[Vegetated filter strips]]
A gravel diaphragm typically requires less setback between the catchment and the BMP.  Where space permits, these three designs can be used in combination to even greater effect!
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A gravel diaphragm typically requires less setback between the catchment and the BMP.  Where space permits, these designs can be used in combination to even greater effect!
    
==Concentrated overland flow==
 
==Concentrated overland flow==

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