Ground Drainage General Instructions
Ground Drainage General Instructions
The ground drainage of running tracks and other athletics facilities includes drainage of the surface located above it.When draining the top surface, the wate which has infiltrated by seepage (seepage water) is collected andon impermeable qround, is fed through drainage channels to the existing drainage system. In the case of porous ground, the seepage water is carried off into lower layers of the ground.The ground must be drained so that the load-carrying ability can be maintained.Penetrating stratum water is also carried away to the recipient through the ground drainage system.
For ecological reasons, the possibility of seeping the surplus water which accumulates from the sports areas on site instead of into the sewage system should always be checked, This will only be possible if the ground has a seepage capability If the gathering grounds are sufficiently large, the installation of a cistern is recommended
The drainage system usually consists of a surface drain comprising a porous. unbound base layer of gravel and crushed stones and drainage channels which carry the surplus water to the existing drainage system.
Watering of Sports Surfaces
The water supply for sports surfaces has the task of ensuring the growth of arass if the sports surface is turfed. cleaning synthetic surfaces and throwing circles, wetting landing area sand and filling steeplechase water jump pit.Quick-release hose points shall be located around the arena, adjacent to the throwing circles, landing area sand pits and steeplechase water jump pit.
Sports surfaces can be irrigated from above (sprinkling)or below (capillary irrigation), for example from the underlying layers. In the case of irrigation from above. the water is pressurised and applied to the surface by sprinklers. In the case of underground irrigation. the water is accumulated in a sealed reservoir from which it seeps by capillary action through the substructure to the lavers requiring the water:
- The root zone of the grass surface
- The dynamic laver and surface of the unbound mineral surface
The latter system is not suitable for watering artificial grass surfaces, For sports surfaces, preference should be given to sprinkling, preferably with stationary systems using pop-up sprinklers.
