Design of a shopping mall rain garden

Quick answer：

A shopping mall rain garden is an integrated water management system designed to capture, store, and treat stormwater runoff from the mall. It incorporates plants, soil, and permeable surfaces to reduce the volume and velocity of stormwater runoff, mitigate flood risks, and improve water quality. The design typically includes elements such as bioretention basins, permeable pavements, and rainwater harvesting systems.