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Preliminary results of water quality assessment using phytoplankton and physicochemical approaches in the Huai River Basin, China

机译：中国淮河流域水质评估初步结果，中国淮河流域水质方法

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Water pollution has been a significant issue in the Huai River Basin (HRB) of China since the late 1970s. In July and December 2013, two field investigations were carried out at 10 sites along the main streams of the basin. The monitoring indices contained both physicochemical variables and the structure and composition of phytoplankton communities. The correlations between communities and physicochemical variables were analyzed using cluster analysis and redundancy analysis. Moreover, water quality was evaluated using the comprehensive nutrition state index (TLI) and Shannon-Wiener diversity index (H). Results indicated that more phytoplankton species were present in December than in July, but total density was less in December. Phytoplankton communities in the midstream of the Shaying River were affected by the same physicochemical factors throughout the year, but ammonia nitrogen and total phosphorus had the greatest influence on these sites in July and December, respectively. The water pollution status of the sampling sites was much greater in the Shaying River midstream than at other sites. TLI was more suitable than H for assessing water quality in the study area. These results provide valuable information for policy makers and stakeholders in water quality assessment, water ecosystem restoration, and sustainable basin management in the HRB.
机译：自20世纪70年代后期以来，中国淮河流域（HRB）是水污染的重要问题。 2013年7月和12月，在盆地主要溪流的10个地点进行了两个现场调查。监测指标包含物理化学变量和浮游植物社区的结构和组成。使用聚类分析和冗余分析分析了社区与物理化学变量之间的相关性。此外，使用综合营养状态指数（TLI）和Shannon-Wiener多样性指数（H）评估水质。结果表明，12月份比7月份更多的植物植物物种，但12月份总密度较少。索宁河中游的浮游植物社区受到全年相同的物理化学因素的影响，但氨氮和总磷在7月和12月对这些网站产生了最大的影响。索宁河中游的采样网站的水污染状况大于其他地点。 TLI更适合于评估研究区域的水质。这些结果为政策制定者和利益攸关方提供了有价值的信息，以便在HRB中提供水质评估，水生态系统修复和可持续盆地管理。

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