What is the primary goal of using a splash block?

The primary goal of using a splash block is to prevent soil erosion. A splash block is typically installed at the base of downspouts to manage the flow of water that comes from a roof. By directing the water away from the foundation of a building and dispersing it over a larger area, splash blocks help to mitigate the impact of the water hitting the ground, which can lead to soil displacement and erosion.

When water from the downspout falls directly onto an area of soil, it can create concentrated flow that erodes the soil over time. The splash block acts as a simple but effective means to break this flow and distribute the water more evenly, reducing the risk of runoff and soil loss. It addresses concerns of landscape stability and can help maintain the integrity of gardens or soil structures surrounding a foundation.

While options that mention aid in water retention, redirecting water flow, and enhancing drainage touch on related aspects of stormwater management, they do not pinpoint the specific function of splash blocks as effectively as preventing soil erosion does. The main intent is to protect the underlying soil by controlling how water exits the downspout and interacts with the ground.