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 ta ble 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 ta ble during trenching operation. What is the name of this de-watering system?