What method is used to assess how quickly water is absorbed by the ground?

The method used to assess how quickly water is absorbed by the ground is known as the soil water absorption rate test, commonly referred to as a percolation test or perc test. This test involves digging a hole, filling it with water, and then measuring the rate at which the water level drops over a specified period. The results help determine the soil's infiltration capacity, which is crucial for various applications, such as designing septic systems, assessing drainage capabilities, and planning landscaping projects.

Conducting a perc test provides valuable information about soil texture and compaction, which significantly affects how water moves through the soil layers. Understanding this absorption rate is vital for proper land management, ensuring that water does not pool on the surface, which could lead to erosion or flooding, and confirming that a site can adequately handle wastewater if a septic system is planned.