湖泊科学Issue(3)：604-616,13.DOI:10.18307/2017.0309
换水率和营养水平对太湖流域横山水库硅藻水华的影响
Combined effects of water exchange rate and nutrient on diatom proliferation in Hengshan Reservoir, Taihu Basin
摘要
Abstract
Phytoplankton, water quality and water level in Hengshan Reservoir of Taihu Basin were studied with the meteorological indexes, in order to analyze the influence of hydrological process on diatom proliferation in the reservoir. The results reveal that the annual diatom biomass shows the significant fluctuations. The diatom proliferation in September is considerably high with the bio-mass of 14.27 mg/L. Genera of the dominant diatom are Synedra, Cyclotella, Achnanthes and Melosira, among which Synedra shows the highest abundance of dominance. Correlation of phytoplankton biomass with nutrients is weak and with the total nitrogen is even negative. Cyclotella biomass is positive related with soluble phosphorus. The water exchange rate in Hengshan Reservoir shows the strong controlling effect on algae biomass, diatom proliferation and nutrient level. Both total nitrogen and soluble phos-phorus show the negative correlation with water exchange rate. The simulation analysis indicates that diatom biomass in Hengshan Reservoir is affected by the joint effects of hydrology and water quality. With the purpose of preventing and controlling diatom bloom in reservoirs, the management should pay an emphasis on both nutrient reduction and water residence time regulation.关键词
硅藻/水华/换水率/横山水库/富营养化/太湖流域Key words
Diatom/bloom/water exchange rate/Hengshan Reservoir/eutrophication/Taihu Basin引用本文复制引用
任杰,秦伯强,朱广伟,金颖薇,许海,朱梦圆,夏明芳,余丽,李慧赟,张运林..换水率和营养水平对太湖流域横山水库硅藻水华的影响[J].湖泊科学,2017,(3):604-616,13.基金项目
科技部国际科技合作专项(2015DFG91980,2014DFG91780)、中国科学院前沿科学重点研究项目(QYZDJ-SSW-DQC008)、国家自然科学基金项目(41671494,51279194)和江苏省太湖水环境综合治理科研项目(TH2014304)联合资助. （2015DFG91980,2014DFG91780）
