'''[[Retention swales]]''' can be imagined as linear, sloped [[dry ponds]]. They typically make relatively small contributions to water volume and quality control than many other BMPs, but they may feature as part of a site-wide treatment train approach. | '''[[Retention swales]]''' can be imagined as linear, sloped [[dry ponds]]. They typically make relatively small contributions to water volume and quality control than many other BMPs, but they may feature as part of a site-wide treatment train approach. |