title: Dispersion coefficients of sewers from tracer experiments.
abstract: In this paper, 60 tracer experiments in 37 different sewer reaches have been analyzed for longitudinal dispersion under dry weather flow conditions. It was found that dispersion coefficients of sewers are two to three orders of magnitude smaller than those measured in rivers and do not differ much from system to system. Suitable equations were identified to predict reasonable dispersion coefficients in sewer reaches with uniform geometry and stable flow conditions. For engineering applications that require a high degree of accuracy the performance of tracer measurements is recommended.
authors.affiliation: Swiss Federal Institute of Aquatic Science and Technology (EAWAG) and Swiss Federal Institute of Technology (ETH), Ueberlandstrasse 133, CH-8600 Dübendorf, Switzerland. joerg.rieckermann@eawag.ch
authors.forename: J
authors.initials: J
authors.lastname: Rieckermann
authors.forename: M
authors.initials: M
authors.lastname: Neumann
authors.forename: C
authors.initials: C
authors.lastname: Ort
authors.forename: J L
authors.initials: JL
authors.lastname: Huisman
authors.forename: W
authors.initials: W
authors.lastname: Gujer
mesh_terms: D005544:Forecasting; D008962:Models, Theoretical; D015203:Reproducibility of Results; D012722:Sewage; D014872:Water Movements; D014887:Weather
chemical_list: D012722:Sewage