Which feature is commonly used for effective stormwater management in landscapes?

Rain gardens are specifically designed landscapes that use natural processes to manage stormwater runoff effectively. They are built to absorb and filter excess rainwater, which helps prevent flooding and reduces the amount of pollutants that reach local waterways. By incorporating native plants that thrive in wet conditions, rain gardens also improve water infiltration and provide habitats for wildlife.

The design of a rain garden typically includes a depression that allows for water to collect and percolate into the soil, facilitating the natural cleaning of runoff. This feature is essential in urban areas where impervious surfaces, such as roads and rooftops, can lead to increased runoff and water pollution.

In contrast, patios, terraces, and fountains do not serve the same purpose for stormwater management. Patios may contribute to hard surfaces that exacerbate runoff issues. Terraces can help with soil erosion and manage slope stability but do not specifically address water absorption like rain gardens do. Fountains might enhance aesthetic appeal or provide recreational benefits but do not play a significant role in effective stormwater management. Thus, the characteristics and functionality of rain gardens make them the most suitable choice for managing stormwater in landscaped areas.