Investigation of current water ecological environment and analysis of water source safety protection for Suyan Reservoir
In order to understand the current status of water ecological environment at Suyan Reservoir,investigation and monitoring of water ecology was carried out at main dam,in the reservoir and at the reservoir tail in May and September of 2022 and 2023.Shannon-Wiener diversity index and Margalef richness index were used to compre-hensively evaluate the water ecological status in respects of species and abundance of the results,and the water quality at main dam was evaluated based on the conventional monitoring results from 2018 to 2023.In 2022 and 2023,58 species(genera)from 6 phyla and 54 species(genera)from 6 phyla of phytoplankton were respectively identified,mainly composed of green algae,blue-green algae and diatoms.In 2022,40 species from 4 phyla of zoo-plankton were identified,mainly consisting of the phyla of rotifers,protozoa and copepods.In 2023,62 species(gen-era)from 4 phyla were identified,mainly consisting of rotifers and protozoa.The comprehensive biological index ranged from 59.2 to 81.2.The comprehensive status evaluation range is Ⅱ～Ⅲ.The water bloom grades were anhy-drous,not obvious and mild.The nutritional status evaluation result was medium nutrition.The diversity and spe-cies richness of plankton in reservoirs are relatively high.The surface water quality at the main dam is class Ⅰ～Ⅲ.In some months,the water quality target requirements of class Ⅱ in the water function zone were not reached with the main item exceeding standard is total phosphorus.The water quality is good,and the overall water ecological en-vironment is in good condition.
万方数据
维普
