Data, code and videos for Retention of buoyant plastic in a well-mixed estuary due to tides, river discharge and winds by Chen, Li, Bowen, Coco, submitted to Marine pollution Bulletin in Mar 2023.

<p>1.Offline model codes: 'drifterofflineS.m';</p><p>Offline float trajectories codes using RK-4 and grounding rules;</p><p>Input: 2D surface flow velocity 'u_sur','v_sur' from the corresponding case of the ROMS quicksave files 'qck';</p><p>Output: 1.'xxxPP.mat' 250 floats trajectories: lon, lat, and position in metre</p><p><br></p><p>2.Output data from offline codes:</p><p>Matlab data: 'xxxPP.mat'; xxx contains seven simulating cases: baselineA, baselineB, flowA, flowB, windA, windB, real;</p><p>Lond=lon of each float; Latd=lat of each float; Yms=x,y position of each float in metre; temporal resolution=5mins</p><p><br></p><p>3.Offline model stats codes:'stats_23jan.m';</p><p>4. supplimentary</p><p>'base.mat' lon-lat and x-y grid</p><p>'nearest_value.m' calculating nearest value</p><p>'lldistkm.m' calculating distance (in km) between two points (lon-lat grid)</p><p>'HG_lgy.txt' coastlines in Hauraki Gulf</p><p>'whclonlatgrid.mat' the two longitudinal axes at the main channel and Henderson Creek for calculating along-channel dispersion</p><p>5.videos for each case</p><p>6. Average recurrence interval (ARI) analysis for the freshwater discharge events in Rangitopuni Creek (ARI_rangitopuni.docx)</p><p>ROMS input files are available as request</p>