Drainage swale details differ depending on the site conditions and the design. Native soils, the presence or absence of curbs, and space are all factors that may influence the design. There are different kinds of swales. The biorentention swale, the biofiltration swale, and the conveyance swale are examples of the different types of swales. Surface grading is included in all the swales. All of
. them manage stormwater with surface grading and soil and plant complexes. There are pictures available so that you can view each type of swale. You can find more information here: http://www.seattle.gov/transportation/rowmanual/manual/6_4.asp
