Question

what are the inputs and outputs of a carpark drain with a grate in terms of slowing water flow, reducing turbidity and diverting?

Answer 1

Answer:Fin and Narrow Filter Drain (Sub-surface Drainage):

Normal methods of sub-surface drainage on motorways and trunk roads, usually installed longitudinally along the lower edge of road pavements.

Keep water out of road structure.

Also check ingress of water from verge areas.