Effects of algae proliferation and density current on the vertical distribution of odor compounds in drinking water reservoirs in summer

	Effects of algae proliferation and density current on the vertical distribution of odor compounds in drinking water reservoirs in summer
	Wu, Tianhao; Zhu, Guangwei; Zhu, Mengyuan; Xu, Hai; Yang, Jun; Zhao, Xianfu
刊名	ENVIRONMENTAL POLLUTION
	2021
卷号	288
英文摘要	Reservoirs are an important type of drinking water source for megacities, while lots of reservoirs are threatened by odor problems during certain seasons. The influencing factors of odor compounds in reservoirs are still unclear. During August 2019, a nationwide survey investigating the distribution of odor compounds in reservoirs used as drinking water sources was conducted on seven reservoirs. 2-methylisoborneol (2-MIB) and geosmin were detected in almost every reservoir, and some odor compound concentrations even exceeded the odor threshold concentration. The average concentration of 2-MIB was 2.68 ng/L, and geosmin was 3.63 ng/L. The average chlorophyll a concentration was 8.25 mu g/L. The dominant genera of phytoplankton in these reservoirs belonged to cyanobacteria and diatom. Statistical analysis showed that odor compound concentration was significantly related to the chlorophyll a concentration and indicated that the odor compounds mainly came from phytoplankton. The concentration of odor compounds in the euphotic zone was significantly related to phytoplankton species and biomass. Therefore, the odor compound concentrations in the subsurface chlorophyll maxima layer was generally higher than in the surface layer. However, the odor compounds in the hypolimnion layer were related to the density current. This research suggests that both phytoplankton proliferation events and heavy storm events are important risk factors increasing odor compounds in reservoirs. Control of algal bloom, in-situ profile monitoring system and depth-adjustable pumping system will greatly reduce the risk of odor problems in reservoirs using as water supplies for large cities.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/20355]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Wu, Tianhao,Zhu, Guangwei,Zhu, Mengyuan,et al. Effects of algae proliferation and density current on the vertical distribution of odor compounds in drinking water reservoirs in summer[J]. ENVIRONMENTAL POLLUTION,2021,288.
APA	Wu, Tianhao,Zhu, Guangwei,Zhu, Mengyuan,Xu, Hai,Yang, Jun,&Zhao, Xianfu.(2021).Effects of algae proliferation and density current on the vertical distribution of odor compounds in drinking water reservoirs in summer.ENVIRONMENTAL POLLUTION,288.
MLA	Wu, Tianhao,et al."Effects of algae proliferation and density current on the vertical distribution of odor compounds in drinking water reservoirs in summer".ENVIRONMENTAL POLLUTION 288(2021).