vertical to horizontal draining system and a synthetic turf having such a system . the draining system of the present invention prevents water from accumulating on the turf surface , which could cause the top - dressing layer to “ float ” and be moved by water inundation . the draining system of the present invention also obviates the need for extensive excavation , underdrain systems and free - draining replacement materials . the draining system of the present invention incorporates a dynamic drainage blanket , preferably sandwiched between two permeable porous geosynthetic or non - woven materials . the synthetic turf system of the present invention allows the use of an infilled synthetic turf over impermeable or semi - permeable surfaces , including impermeable soils , asphalt and concrete without having to remove such surfaces .