The rain garden, also called bio retention basin, collects, detains and treats rainwater runoff that flows from the park. The filtered rainwater is then further and reused in the water play area and wading stream. Approximately 80m² in size, it not only enhances the quality of rainwater runoff, but also promotes biodiversity.
About 10 species of plants have been planted there. It is a small habitat for animals and insects, for example, we saw the Grey Pansy Butterfly. As excessive nitrogen and phosphorus in the air will cause algae bloom in the reservoir which is extremely detrimental, special plants are grown in the rain garden to absorb the elements. We feel that it is an intelligent method to curb algae growth and the lovely plants adds much natural beauty to the place. Besides, the plants serve as an excellent habitat for creatures of LSR to reside in.
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