A New Multibranch Model for Metals in River Systems: Impacts and Control of Tannery Wastes in Bangladesh

A new multibranch Integrated Catchment (INCA) model INCA-Metals has been developed to simulate the impact of tannery discharges on river systems. The accounts for key chemical reaction kinetic processes operating as well sedimentation, resuspension, dilution, mixing and redistribution pollutants in rivers downstream discharge points mine or acid rock drainage sites. is dynamic simulates daily behaviour hydrology eight metals, including cadmium, mercury, copper, zinc, lead, arsenic, manganese chromium, cyanide ammonia. semi-distributed can catchments, tributaries instream behaviour. also account diffuse pollution from rural runoff point sources effluent trade discharges. applied Savar complex Dhaleshwari River system Bangladesh assess impacts levels evaluate a set treatment scenarios control, particularly dry season. It shown that plant at needs significantly improve its operation capability order alleviate metal System protect Meghna falls Bay Bengal.