Supportive files

'base.mat' lon-lat and x-y grid

'nearest_value.m' calculating nearest value

'lldistkm.m' calculating distance (in km) between two points (lon-lat grid)

'HG_lgy.txt' coastlines in Hauraki Gulf

'whclonlatgrid.mat' the two longitudinal axes at the main channel and Henderson Creek for calculating along-channel dispersion