title: Estimation of pollutant loads from urban roadway runoff.
abstract: A simulation model consisting of a deposition process and a wash-off process was proposed to evaluate the pollutant loads from urban roadways, and was verified based on field survey data obtained over a 5-year period in the Lake Biwa watershed. The model parameters were determined by minimizing the total sum of squares of differences between the observed data and simulated ones. By applying this model to all roadways in the watershed, the calculated amounts of COD(Mn), organic carbon, nitrogen and phosphorus in particulate forms were 15.9, 15.7, 0.88 and 0.15 kg/(km(2) .d), respectively, and those in dissolved forms were 14.1, 12.5, 2.62 and 0.03 kg/(km(2) .d), respectively. From the results, the pollutant loads of COD(Mn), TN and TP obtained for the Lake Biwa watershed (total roadway area of 98.9 km(2)) were estimated to be 2,950, 350 and 18 kg/d, respectively.
authors.affiliation: Lake Biwa - Yodo River Water Quality Preservation Organization, Osaka 540-6591, Japan. wada@byq.or.jp
authors.forename: K
authors.initials: K
authors.lastname: Wada
authors.forename: S
authors.initials: S
authors.lastname: Fujii
mesh_terms: D002947:Cities; D003198:Computer Simulation; D005618:Fresh Water; D007564:Japan; D008962:Models, Theoretical; D011891:Rain; D014186:Transportation; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014877:Water Pollution, Chemical
chemical_list: D014874:Water Pollutants, Chemical