Metal tubes are driven into the ground around the perimeter of an area to be excavated for a culvert installation. The tubes are connected to one or more above ground pumps to lower and maintain reduced water table during trenching operation. What is the name of this de-watering system?

Metal tubes are driven into the ground around the perimeter of an area to be excavated for a culvert installation. The tubes are connected to one or more above ground pumps to lower and maintain reduced water table during trenching operation. What is the name of this de-watering system?