Infiltration trenches

Infiltration ditches are excavations in the ground 2 to 3 meters long and 1 meter wide and deep, useful for reducing surface runoff and erosion. They are also used as part of stormwater harvesting and treatment systems, as the soil and porous materials in the trench can retain and filter pollutants from rainwater before they infiltrate the soil. When it rains, water percolates through the soil and reaches the surface of the infiltration trench, where it is absorbed and infiltrates into the soil through the porous materials. By infiltrating the soil, groundwater is recharged and available for future use. In this case, if the soil is clay, the rainwater can be stored and put to some use.