What is a common feature of poor drainage areas?

Stagnant water collection is a common feature of poor drainage areas due to insufficient slope or outlet for water to flow away from the surface. In these areas, rainfall or runoff accumulates rather than being transported away, leading to pools of water that can persist for extended periods. This stagnation can result in various problems, including increased mosquito populations, potential breeding grounds for pathogens, and damage to plants and infrastructure. The inability of water to drain properly is a key indicator of ineffective drainage systems, making it a significant concern for landscape and stormwater management.

Other features, such as excessive sediment flow, may occur in poorly drained areas, but they are not characteristic of the stagnant conditions that primarily signify inadequate drainage. Rapid evaporation rates are typically associated with well-drained soils and climates with heat, where water is permitted to dissipate quickly. High soil fertility can be a separate issue and is not inherently linked to drainage challenges, as soils can be fertile or poor regardless of their drainage qualities.