Controlling Cyanobacteria and Its Effectiveness: An Evaluation in Four Reservoirs for Drinking Water Supply

Chapter
Part of the Monographiae Biologicae book series (MOBI, volume 91)

Abstract

Algal blooms, a common symptom of eutrophication, do not only affect structure and function of reservoir ecosystems but also public health. At present, 18.9% of large- or middle-sized reservoirs larger than 107 m3 in Zhejiang province are medium-eutrophic, and 81.1% are eutrophic or very eutrophic. Cyanobacterial blooms occur frequently, and cause great problems to water quality management. The present paper takes Qiaodun reservoir in Wunzhou, Liduhu reservoir and Meihu reservoir in Ningbo, and Duihekou reservoir in Huzou as examples, located in south, middle, north Zhejiang province, central-east China. It discusses a strategy for regulating algal blooms in these four reservoirs, and analyzes effects on structure and succession of plankton and on the dynamics of physical-chemical variates. The results show that emergency measures, like spraying alum plasma, biomanipulation with phytoplanktivorous fish, biological purification using aquatic plants, and mechanical dredging, may control algal blooms to some extent, whether used singly or in combination. Ameliorated alum plasma combined with fish biomanipulation produced the best integrated ecological effects in Qiaodun reservoir. While dredging can improve water quality in the short term, it is not always effective and may even worsen the situation.

Keywords

Algal Bloom Secchi Depth Cyanobacterial Bloom Water Transparency Silver Carp 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This study was supported by a fund from National Natural Science Foundation of China (NSFC) (No. 30771658) and Zhejiang Provincial Natural Science Foundation of China (No. Z505319).

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Copyright information

© Springer Netherlands 2012

Authors and Affiliations

  1. 1.Faculty of Life Science and BiotechnologyNingbo UniversityNingboChina

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