What does the term 'active treatment' refer to in stormwater management?

The term 'active treatment' in stormwater management specifically refers to methods that involve mechanical or chemical processes designed to improve water quality. This encompasses a range of techniques where equipment or chemical additives are employed to remove pollutants from stormwater runoff or treat water to make it safe for discharge or reuse. Active treatment processes are characterized by their intervention in water quality management, as opposed to more natural or passive methods.

In contrast, natural processes enhancing water quality are better categorized under passive treatment methods which rely on ecological processes rather than mechanical or chemical interventions. Systems for capturing sediment in ponds typically fall under passive treatment strategies as well, utilizing natural sedimentation without active manipulation. Regular landscaping aimed at promoting healthy vegetation also does not classify as active treatment since it is more about establishing a healthy ecosystem rather than directly treating stormwater.

Thus, the concept of active treatment is distinct in stormwater management as it underscores the use of technology and active interventions to achieve desired water quality outcomes, making it essential for certain contexts where immediate improvement is necessary.