What is the primary function of infiltration trenches?

The primary function of infiltration trenches is to capture and store stormwater. These structures are designed to temporarily hold water during and after rainfall events, allowing it to percolate slowly into the surrounding soil. By doing so, infiltration trenches help to recharge groundwater supplies and minimize surface runoff, which can reduce the risk of flooding and improve water quality by allowing water to filter through soil layers.

This function is particularly important in urban areas, where impervious surfaces can significantly increase the volume and rate of stormwater runoff. By capturing and attenuating this runoff, infiltration trenches help maintain the hydrological balance of the local environment and promote sustainable water management practices.

The other options focus on different aspects of stormwater management but do not encapsulate the primary purpose of infiltration trenches. While preventing erosion, diverting water, and filtering sediments are important components of a comprehensive stormwater management strategy, they are not the main objective of infiltration trenches.