Effects of Water-Level on Water Quality of Reservoir in Numerical Simulated Experiments

Abstract

There are many factors that affect the quality of reservoir water, one of the direct factor is water level of reservoirs. To quantitatively study the water quality in different water level of a source water reservoir, numerical simulation was carried out. Firstly, the reservoir hydrodynamic-water quality model was developed, and verified by the field data from reservoir administration. Then the models were used to predict the impact of water-level change on the water quality. The simulation results showed that at low water-level pollutants dispersal ability decreased, and increased at higher water-level. At low water-level, the contents of TN and TP were higher, compared with higher water-level condition, in water body of the reservoir. The simulation results have theoretical and practical significance for evaluating water quality impact of lowered water-level operation and water quality protection of reservoirs.