SuDS or Sustainable Drainage Systems is used to manage surface water flows. SuDS can also be used to manage water flow to watercourses.
Because of the lack of natural infiltration, SuDS are more commonly used in urban areas. There are many surfaces that are sealed with buildings and block paving. Contrary to the more natural, rural environment where rainfall infiltrates through permeable surfaces.
Sustainable Drainage Systems (also known as culverts and pipes) are used in more urbanized areas and built-up environments to divert water to local watercourses. There are many types, and they are all used for different purposes in different environments.