Drainage
15. Drainage - measures for the removal of groundwater. It is divided into: deep drainage - for general lowering of the water table; wall drainage for removing groundwater under building and structure foundations, and trench drainage - for removing groundwater from porous bases and coverings
Source: Order of the Ministry of Industry and Trade of the Russian Federation dated 30.12.2009 No. 1215 "On Approval of Normative Methodological Documents Regulating the Operation and Maintenance of Experimental Aviation Airfields" (together with "Norms for Fitness for Operation of Experimental Aviation Airfields (NFEA EA)", "Guidelines for Operational Maintenance of Experimental Aviation Airfields (REMA EA)") (Registered by the Ministry of Justice of the Russian Federation on 05.04.2010 No. 16822)