To reduce the harm of reservoir pollution accident and offer an available suggesting for the managers, it is very important to study the outflow of the pollutant in reservoir. Based on the solution of the 3-D pollutant transportation equation and analysis of hydrodynamics characteristics of the water near the outflow, this article makes a systematic study on the impacts of the vertical position of outflow on the discharging of pollutant in reservoir. It is found that impacts of the vertical position of outflow on the discharging of pollutant are different in different conditions. They rely on the pollutant's vertical distributing near the outflow.
