简介：Aspatiallyaveragednumericalmodelwasdevelopedtodescribetheerosionofcohesivesediment.Togetherwithknownempiricalrelations,themodelcomprisesanewformulationforresuspensionduetofishactivity.ExperimentsonerosionofnaturalsedimentsintheannularflumeatAachenUniversityareusedformodelcalibration.Empiricalcoefficientswereevaluatedwithgeneticalgorithmstoachievethebestagreementbetweenthemodelresultsandtheexperimentaldata.Thepresentedmodelshowssufficientflexibilitytoaccountforvarioussedimentproperties,includingdifferentsedimentsources,naturalandartificialcontaminants,presenceorabsenceofaquaticorganisms,andresultsinanaveragecoefficientofdetermination,R290.5%betweenthemodelresultsandtheexperimentaldata.Modelvalidationallowsittobeassumedthatdifferentcontaminantsaffectbedpropertiesdifferently.Fishactivityplaysanessentialroleincorrectresuspensionprediction.Furthersedimenterosionexperimentswithcarefullychosenconditionswillallowamorecomprehensivemodelevaluation.Thepresentedmodelisintendedtoserveasabuildingblockinthedevelopmentofahydraulic-sediment-biotamodelwithintheW3-Hydro:WaterQualityEventDetectionforUrbanWaterSecurityandUrbanWaterManagementBasedonHydrotoxicologicalInvestigationsprojectthataimstoimprovetheknowledgeconcerningbioavailability,transport,fate,andeffectsofcontaminantsontheaquaticenvironment.