In an emergency drilling, IWHR researchers from Department of Water Resources made use of the previously-developed Emergency Dispatch System for Water Pollution in Songhua River Basin to speedily conduct water quality-quantity coupling simulative computation and draft dispatch plan. Simulated forecast was made on the arrival time of pollutant mass at the key cross-sections of the main channel of Songhua River, peak concentration of major pollutants, and the standard-exceeding duration of pollutants, effectively supporting the making of on-site monitoring plan, emergency decision and response scheme.