Splash blocks are rectangular or trapezoidal structures made from concrete, plastic, or other durable materials. Their main purpose is to collect and redirect water from downspouts, preventing it from pooling near the foundation. By diverting water away from the building, splash blocks help safeguard against leakage, seepage, and structural damage caused by excessive moisture.
Traditional Use on Lawns and Gardens:
Traditionally, splash blocks are placed on lawns or gardens, where the ground is absorbent. These areas allow water to seep into the soil, reducing the risk of flooding and erosion. By directing water flow away from the foundation, lawn-based splash blocks help preserve the integrity of the building and minimize the potential for water damage.
Challenges with Pavement Installation:
Compacting runoff water:
When it comes to installing a splash block on pavement, several challenges arise due to the nature of non-permeable surfaces. Pavement, whether concrete or asphalt, does not allow water to penetrate through its surface. Instead, it creates runoff, often leading to pooling or flooding in low-lying areas. Unlike lawns, pavement does not absorb the water, making it more challenging for splash blocks to effectively manage the flow.
Limited effectiveness:
Installing a splash block on pavement may not yield the desired results. Since the water cannot be absorbed, it will not disappear, but rather flow across the surface until it finds another outlet. In many cases, this can create puddles or contribute to the deterioration of the pavement. Splash blocks on pavement might redirect the initial flow, but they cannot prevent water pooling or flooding unless additional measures are taken.
Alternative Options:
1. Trench drains:
Trench drains are a practical alternative for managing water runoff on pavement. These drainage systems consist of a long, narrow channel that collects water and directs it to a designated outlet, such as a storm drain or nearby drainage system. Trench drains are specifically designed to handle significant quantities of water, making them more effective for paved areas compared to traditional splash blocks.
2. Permeable pavement:
For those seeking a more sustainable solution, permeable pavement is another option worth considering. Permeable pavement is designed with gaps or porous materials that allow water to infiltrate into the ground beneath. This innovative approach, often used in sustainable urban development, not only manages water runoff effectively but also helps replenish groundwater resources.
While splash blocks are commonly used on lawns and gardens, they are not as effective on pavement due to its non-permeable nature. Pavement installation presents challenges in redirecting water flow and preventing pooling or flooding. However, alternative options such as trench drains or permeable pavement can be explored for better water management around paved surfaces. Consulting with a professional contractor or landscaping expert is recommended to determine the most suitable solution for individual circumstances.