Drainage systems are susceptible to various issues, including blockages, leaks, and corrosion, among others. These issues can cause water to back up, resulting in flooding and sewage backup, which can be hazardous to the environment and public health. While some drainage problems are visible, others may not be noticeable until extensive damage has occurred. Therefore, to avoid costly repairs and health risks, it is essential to conduct regular drainage surveys to identify potential problems before they escalate.