1. The drainage slope of outdoor field should be controlled within the range of 0.3% to 0.8%, that of natural lawn field is 0.3% to 0.5%, and that of artificial lawn field (without water seepage function) is no more than 0.8%(with water seepage function) and 0.3%.
2. The site and its buffer zone generally adopt the drainage mode of "drainage combined with seepage", and the underground seepage system is closely related to the site structure, mostly in the form of blind ditch.
3. The width of the drainage ditch in the indoor site shall not be less than 400, and the longitudinal slope in the ditch shall generally be 0.3%-0.5%. Sand sinking Wells shall be evenly set in the ditch (spacing shall be 30m). The depth of the drainage ditch should be determined according to the local climate conditions, and the location should be determined according to the specific site layout.
4. Indoor acrylic acid, artificial lawn site should be waterproof treatment, so there is no need to set up a blind ditch drainage.