Which of the following increases maintenance of stormwater systems?

Increased flooding can lead to a variety of maintenance issues within stormwater systems. When flooding occurs, it often overwhelms the designed capacity of these systems, leading to backup, erosion of banks, and possible damage to infrastructure. Excess water can carry and deposit debris, leading to blockages and necessitating more frequent maintenance to clear and repair elements of the stormwater management system. Additionally, flooding can exacerbate problems related to sedimentation and water quality, increasing the need for regular inspections and interventions.

On the other hand, improved soil structure, effective vegetation growth, and reduced sedimentation generally contribute to a more stable and efficient stormwater system. These conditions can promote better drainage, enhance plant health, and reduce the volumes of sediment that enter the system, leading to lower maintenance requirements overall. Each of these factors supports the long-term functionality of stormwater systems, whereas increased flooding typically creates more challenges that demand ongoing maintenance efforts.