Water quality modelling for a tidal esturary: application to Hooghly estuary, east coast of India

摘要

A vertically integrated numerical model has been developed to study the circulation, salinity and pollutant dispersal in Hooghly estuary. The model is fully non-linear and uses a semi-explicit finite difference scheme to solve the basic equations on a staggered grid. The model simulated water levels, currents and salinity have been validated with the available observations By introducing BOD as a tracer, the pollutant transport in the estuary has been carried out for different outfall locations. Various scenarios of pollutant dispersal with different discharge conditions have also been presented.