SPIRAL VALLEY GREEN SPACE FEATURE CAPABLE OF REDUCING POLLUTANTS IN RUNOFF

摘要

A spiral valley green space feature capable of reducing pollutants in runoff comprises a spiral valley green space feature (1) and a water retaining and filtering wall (2). The spiral valley green space feature (1) comprises a spiral plant zone (3) and a bottom plant zone (4). The water retaining and filtering wall (2) has a shape of an inverted truncated cone, and consists of 2-3 gravel layers comprising different materials from the inside to the outside.