cee200: Environmental and Water Resources Engineering Seminar UCLA Civil & Environmental Engineering Department Nitrate Removal by Biochar-Amended Woodchip Biofilters Alexander Berger Master’s Student Civil and Environmental Engineering, UCLA Stormwater biofilters, particularly woodchip biofilters, have been used to remove nitrate from stormwater, but their performance is expected to decrease under extreme weather conditions such as prolonged drying and high rainfall intensity, which are expected to be more frequent during climate change. The objective of this study was to examine the effect of antecedent drying conditions and rainfall intensity on nitrate removal capacity of woodchip biofilters and evaluate whether addition fo biochar would decrease the detrimental effect of high intensity rainfall on nitrate removal. Nitrate removal capacity of biochar-amended woodchip biofilters (0-20% biochar by volume) were compared at storm event with different rainfall intensities (...