Category: Stormwater Symposium
Substantial costs may be associated with the design and implementation of structural best management practices (BMPs) within urban areas. Furthermore, structure BMPs often do not provide sufficient removal of rates of nutrients, especially nitrogen. In some BMPs, biochar has been used to enhance media in filters, such as bioretention systems. This study considers the use of biochar as a roadside soil amendment. Material and implementation costs are low. A field study has demonstrated significant enhancement of infiltration rates. This study uses a series of column studies to compare the removal rates of nitrogen from infiltrating stormwater. Removal rates from infiltration into natural roadside soils and into biochar-amended soils are compared. Impacts of hydrologically mediated changes (such as changes in retention times) are compared to other impacts on the fate of nutrients within these roadside soils.
Civil and Environmental Engineerng, University of Virginia