Impacts of storm events on chlorophyll-a variations and controlling factors for algal bloom in a river receiving reclaimed water
文献类型：期刊论文
| 作者 | Liao, Anran3,4; Han, Dongmei1,3,4; Song, Xianfang1,3,4; Yang, Shengtian2 |
| 刊名 | JOURNAL OF ENVIRONMENTAL MANAGEMENT
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 297页码:12 |
| 关键词 | Chlorophyll-a Algal bloom Storm event Temperature Reclaimed water |
| ISSN号 | 0301-4797 |
| DOI | 10.1016/j.jenvman.2021.113376 |
| 通讯作者 | Han, Dongmei(handm@igsnrr.ac.cn) |
| 英文摘要 | Harmful algal bloom is prevalent in the reclaimed-water-source (RWS) river caused by the excessive nutrient's inputs. Rainfall water may be the sole nutrient-diluted water source for the RWS river. However, the effects of storm events on the algal bloom in the RWS river are poorly understood. This study presents chlorophyll-a (Chla) variations before, during, and after the initial storm events (Pre-storm, In-storm, and Post-storm) at four representative sites with distinct hydraulic conditions in a dam-regulated RWS river system, Beijing. The response of Chl-a to the initial storm events mostly depends on the ecosystem status that caused by the river hydraulic properties. The upstream is more river-like and downstream is more lake-like. In the river-like system, elevated water temperature (WT, increased by 2 %) could support the dominating algae (diatom) growth (Chl-a increased by 130 %) from Pre-storm to In-storm period. In the lake-like system, the dominant algae (blue algae) declined (Chl-a sharply decreased by 96%-99 %) due to the lower WT (decreased by 3%-7%) and increased flow velocities from Pre-storm to In-storm period. During the Post-storm period, the dominant algae break out (Chl-a surged by 20%-319 %) in the lake-like system caused by the recovered WT (increased by 3%-6%) and flow velocity. The occurrence of algal bloom can be predicted by the Random Forest (RF) model based on water quality parameters such as total nitrogen (TN). The thresholds of algal bloom for the Pre-storm, In-storm, and Post-storm periods were identified as 30 mu g/L, 10 mu g/L, and 10 mu g/L, respectively. The two driven factors were WT and nitrate (NO3-N) for the Pre-storm period and were WT and TN for the In- & Post-storm periods. A higher risk of algal bloom is highlighted during the initial storm events in the RWS river. We propose recommendations for improving water quality in the RWS river systems under the climatic change. |
| WOS关键词 | CHAOBAI RIVER ; COMMUNITY COMPOSITION ; RELATIVE IMPORTANCE ; URBAN RIVER ; INTAKE AREA ; LAKE TAIHU ; PHYTOPLANKTON ; NUTRIENT ; RESERVOIR ; TEMPERATURE |
| 资助项目 | National Natural Science Foundation of China, China[41730749] ; Beijing Municipal Natural Science Foundation, China[8212035] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000691273600007 |
| 出版者 | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
| 资助机构 | National Natural Science Foundation of China, China ; Beijing Municipal Natural Science Foundation, China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/165011]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Han, Dongmei |
| 作者单位 | 1.Univ Chinese Acad Sci UCAS, Sino Danish Coll SDC, Beijing 100049, Peoples R China 2.Beijing Normal Univ, Beijing 100875, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liao, Anran,Han, Dongmei,Song, Xianfang,et al. Impacts of storm events on chlorophyll-a variations and controlling factors for algal bloom in a river receiving reclaimed water[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2021,297:12. |
| APA | Liao, Anran,Han, Dongmei,Song, Xianfang,&Yang, Shengtian.(2021).Impacts of storm events on chlorophyll-a variations and controlling factors for algal bloom in a river receiving reclaimed water.JOURNAL OF ENVIRONMENTAL MANAGEMENT,297,12. |
| MLA | Liao, Anran,et al."Impacts of storm events on chlorophyll-a variations and controlling factors for algal bloom in a river receiving reclaimed water".JOURNAL OF ENVIRONMENTAL MANAGEMENT 297(2021):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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