Changes

==Shallow wells==

==Shallow wells==

To measure the depth of ponding on the filter media bed surface, and rate at which the ponded water drains, install a shallow well with a water level logger:

For bioretention cells, stormwater tree trenches and enhanced swales featuring surface ponding areas, to measure the depth of ponding on the surface of the practice, and rate at which the ponded water drains, install a shallow well with a water level logger:

* Use a section of perforated pipe or well screen with a geotextile sock around the perforated section that will allow ponded water to enter the well while preventing sediment from accumulating within it.

* Use a section of perforated pipe or well screen with a geotextile sock that will allow ponded water to enter the well while preventing sediment from accumulating within it.

* Locate the well in the deepest portion of the surface ponding area or where ponding most frequently occurs.

* Locate the well in the deepest portion of the surface ponding area or where ponding most frequently occurs.

* Measure the depth of the water level sensor in the well, relative to the filter media surface to translate sensor readings into surface ponding depth measurements.

* Measure the depth of the water level sensor in the well, relative to the filter media surface to translate sensor readings into surface ponding depth measurements.