Changes

==Shallow wells==

==Shallow wells==

To measure the depth of ponding and the rate at which the ponding water infiltrates, install a shallow well with a water level logger:

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:

* Use a perforated pipe (a piezometer) that will allow surface water to enter the well but will help prevent sediment from accumulating within it.

* 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.

* Locate the well where ponding occurs first - near the [[inlet]] or the lowest point in the feature.

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

* Measure where the ground surface is relative to where you will be taking your water level 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.

* Ensure there is a small reservoir in the well to keep your level probe submerged in dry conditions. This practice will also help with calibration.

* Ensure there is a solid cap on the bottom of the well to form a small water reservoir (e.g., 100 mm deep) to keep the water level sensor submerged during dry conditions. This practice also helps with checking calibration of the sensor.

==Deeper wells==

==Deeper wells==