What is the function of a rain garden?

A rain garden serves a crucial environmental function by managing stormwater runoff and promoting groundwater recharge. When it rains, instead of water flowing directly into storm drains or rushing over impervious surfaces, a rain garden captures this runoff. The plants and soil in the garden help filter out pollutants, such as oils, heavy metals, and sediments, allowing cleaner water to percolate back into the groundwater system. This process plays a vital role in replenishing aquifers and reducing the risk of flooding and erosion in surrounding areas.

While enhancing aesthetic appeal, providing habitats, and creating recreational spaces are valuable benefits of landscape features, the primary purpose of a rain garden is focused on ecological management. Its design specifically aims to control and utilize stormwater effectively, thereby making it an essential tool in sustainable landscape management.