Author(s): Naihao Tan; Ying Wang; Bo Meng; Dongfei He
Linked Author(s): Ying Wang
Keywords: No keywords
Abstract: Sanhekou Reservoir is an important water source of the Hanjiang to Weihe River Project in Shanxi Province. In order to simulate and predict the health status of the reservoir ecological environment, sensitivity analysis of related parameters was carried out based on AQUATOX model, and the key parameters were determined. The main water quality indexes and the change rule of algae in Sanhekou Reservoir were simulated. The water quality and ecological process of the reservoir are predicted. The important parameters, such as, the optimum temperature corresponding to Phyt, Blue-Green max and Phyt Low-Nut Diatom, Including the maximum photosynthetic rate of Phyt, Blue-Green max et al, was determined. The simulation results are good. The average relative errors are within 15%. The total phosphorus (TP) concentration in 2020 is below 0.029 mgL-1, the total nitrogen (TN) concentration is below 0.68 mgL-1, and the water quality is between Class Ⅱ and Class Ⅲ. The biomass of Phyt High-Nut Diatom, Phyt Low-Nut Diatom, Phyto, Green and Phyt, Blue-Green max had obvious seasonal variation, which was roughly consistent with the actual water environment of Sanhekou Reservoir. The results show that the water quality of Sanhekou reservoir will remain between Class Ⅱ and Class Ⅲ, and the water quality in the dry season is the best period of each year. Phyt, Blue-Green max have the largest biomass, with a peak of 1.25~1.45 mgL-1 (dry weight). The simulation study can provide guidance for water ecological control and management of Sanhekou reservoir in the future.
Year: 2022