Algal blooms in the middle and lower Han River: Characteristics, early warning and prevention
文献类型：期刊论文
| 作者 | Xin, Xiaokang; Zhang, Hong ; Lei, Pei; Tang, Wenzhong; Yin, Wei; Li, Jian; Zhong, Huan; Li, Kefeng
|
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2020-03-01 |
| 卷号 | 706页码:1-7 |
| 关键词 | Algal blooms Eutrophication Danjiangkou Reservoir Han River South to North Water Diversion Project Threshold level |
| ISSN号 | 0048-9697 |
| 英文摘要 | Eutrophication with the sustained occurrence of harmful algal blooms (HABs) has been widely recognized since the 1990s as one of the largest drinking water quality issues in the middle and lower reaches of the Han River (MLHR, the largest tributary of Yangtze). Due to impoundment of the middle route of the South to North Water Diversion Project (SNWDP), the height of the Danjiangkou Reservoir Dam was raised in 2014, resulting in lower discharge (or flow rate) for the MLHR, and subsequently enhancing the potential occurrence probabilities of HABs. Here, the characteristics of HABs that took place during the 1992 to 2018 period were summarized based on the historical water quality and meteorological data. Then, some key factors governing the HABs were analyzed to explore the underlying mechanisms. The results showed that diatoms (Cyclotella sp.) were the dominant species of the HABs. The simultaneous increase of algal density and total phosphorus (TP) concentration during algal blooms revealed that phosphorus was the key limiting nutrient for algal growth. The algal density was significantly negatively correlated with water discharge (R-2 = 0.764), or flow rate (R-2 = 0.711), indicating that the increase of water discharge from Danjiangkou Reservoir could possibly mitigate the occurrence of HABs. The threshold level of water discharge for HAB prevention was estimated as 500 m(3)/s in Xiantao Gauging Station before the height of the Dam was raised in 2014, but it subsequently increased to 800 m(3)/s afterwards. Our study clearly revealed that the occurrence probabilities of HABs in the MLHR were higher than before because of the increase in the phosphorus concentration and the decrease in water discharge under the new engineering conditions of the SNWDP. Therefore, it is urgent to undertake strategies for the HABs prevention in the MLHR. (C) 2019 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44898]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Xin, Xiaokang,Zhang, Hong,Lei, Pei,et al. Algal blooms in the middle and lower Han River: Characteristics, early warning and prevention[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,706:1-7. |
| APA | Xin, Xiaokang.,Zhang, Hong.,Lei, Pei.,Tang, Wenzhong.,Yin, Wei.,...&Li, Kefeng.(2020).Algal blooms in the middle and lower Han River: Characteristics, early warning and prevention.SCIENCE OF THE TOTAL ENVIRONMENT,706,1-7. |
| MLA | Xin, Xiaokang,et al."Algal blooms in the middle and lower Han River: Characteristics, early warning and prevention".SCIENCE OF THE TOTAL ENVIRONMENT 706(2020):1-7. |
入库方式： OAI收割
来源：生态环境研究中心
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