In drainage systems, what does the term "infiltration" refer to?

In drainage systems, "infiltration" specifically refers to the absorption of rainwater into the surface. This process is crucial for understanding how water moves through different layers of soil and how it interacts with the surrounding landscape. When rain falls, some of it penetrates the ground, replenishing groundwater supplies and preventing excessive surface runoff. This natural process helps to mitigate flooding, reduce erosion, and facilitate the natural filtration of water.

The significance of infiltration lies in its role in sustainable drainage practices. By promoting infiltration, landscape architects and engineers can design systems that enhance water absorption, reduce stormwater peak flows, and improve the overall health of ecosystems. Proper infiltration practices can lead to improved soil moistures, support plant growth, and maintain the natural hydrology of an area. Understanding infiltration is essential for managing drainage and stormwater effectively.