Selection of water source for water transfer based on algal growth potential to prevent algal blooms.
Selection of water source for water transfer based on algal growth potential to prevent algal blooms.
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DOI：
10.1016/j.jes.2020.10.020
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发表时间：
2021-05
影响因子：
6.9
通讯作者：
Yongjun Song;Jing Qi;Le-Yong Deng;Yaohui Bai;Huijuan Liu;J. Qu
中科院分区：
文献类型：
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作者：
Yongjun Song;Jing Qi;Le-Yong Deng;Yaohui Bai;Huijuan Liu;J. Qu
调水已成为解决湖泊水质恶化、水位下降的重要手段。然而，调水工程水源的选择原则主要是基于对水质的影响，忽略了浮游植物群落的变化和水华的风险的影响。本研究应用藻类生长势（AGP）试验预测调水工程引起的浮游植物群落变化。通过对澄海水质和浮游植物群落变化的分析，评价了拟建调水水源（巴清河和金沙江）的可行性。结果表明，采用金沙江模拟调水水源，可使程海湖水中总氮（TN）和总磷（TP）浓度分别降至0.52mg/L和0.02mg/L。随着金沙江调水工程的实施，藻类细胞密度降低了60%，浮游植物群落相对稳定，优势种圆柱鱼腥藻（Anabaena cylindrica）在物种竞争的作用下进化为阿诺鱼腥藻（Anabaenopsis arnoldii）。然而，在八清河调水工程后，即使水质得到改善，水华的风险也会增加。在同一优势种下，藻类在调水水源中增殖较快。因此，调水工程不仅要从水质变化的角度进行评价，还要从水华风险的角度进行评价。
Water transfer is becoming a popular method for solving the problems of water quality deterioration and water level drawdown in lakes. However, the principle of choosing water sources for water transfer projects has mainly been based on the effects on water quality, which neglects the influence in the variation of phytoplankton community and the risk of algal blooms. In this study, algal growth potential (AGP) test was applied to predict changes in the phytoplankton community caused by water transfer projects. The feasibility of proposed water transfer sources (Baqing River and Jinsha River) was assessed through the changes in both water quality and phytoplankton community in Chenghai Lake, Southwest China. The results showed that the concentration of total nitrogen (TN) and total phosphorus (TP) in Chenghai Lake could be decreased to 0.52 mg/L and 0.02 mg/L respectively with the simulated water transfer source of Jinsha River. The algal cell density could be reduced by 60%, and the phytoplankton community would become relatively stable with the Jinsha River water transfer project, and the dominant species ofAnabaena cylindricaevolved intoAnabaenopsis arnoldiidue to the species competition. However, the risk of algal blooms would be increased after the Baqing River water transfer project even with the improved water quality. Algae gained faster proliferation with the same dominant species in water transfer source. Therefore, water transfer projects should be assessed from not only the variation of water quality but also the risk of algal blooms.