Zhang Chen, Zhang Wenna, Huang Yixuan, Gao Xueping
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, 300072, China.
Environ Sci Pollut Res Int. 2017 Mar;24(7):6746-6756. doi: 10.1007/s11356-017-8402-1. Epub 2017 Jan 13.
To explore the correlations among water quality parameters, suspended solids (SS) and total dissolved solids (TDS) with meteorological factors in a shallow reservoir in China, the long-term variations of water quality were considered. A non-parametric regression method, generalized additive models (GAM), was used to analyse the correlations among eleven physicochemical and biological parameters as well as three meteorological factors (wind speed, rainfall and solar radiation) which we collected from 2000 to 2011. The results indicate that the three meteorological factors may have positive effects on SS. Moreover, statistically significant correlations between many water quality parameters and SS or TDS were exhibited seasonally. The correlations between electrical conductivity (EC) and SS were opposite to correlations between EC and TDS. This finding reveals that TDS have a positive impact on EC, while EC negatively affects SS. The results indicated that many parameters, such as total nitrogen, total phosphorus, biological oxygen demand (BOD) and chemical oxygen demand (COD), were related to SS due to the adsorption of SS. Moreover, both positive and negative correlations between COD and TDS were observed in this freshwater reservoir. The positive correlation between chlorophyll a and SS suggested that the change of SS concentration in autumn was caused by the growth of algae. Meanwhile, significant correlations between SS and meteorological factors were also observed, indicating that meteorological factors had effects on SS dynamics. This study provides useful information regarding the correlations among water quality parameters, SS and TDS with meteorological factors in a freshwater reservoir.
为探究中国某浅水水库水质参数、悬浮固体（SS）和总溶解固体（TDS）与气象因素之间的相关性，对水质的长期变化进行了考量。采用一种非参数回归方法——广义相加模型（GAM），分析了2000年至2011年期间收集的11个理化和生物参数以及3个气象因素（风速、降雨量和太阳辐射）之间的相关性。结果表明，这3个气象因素可能对SS有正向影响。此外，许多水质参数与SS或TDS之间的相关性呈现出季节性的统计学显著差异。电导率（EC）与SS之间的相关性与EC和TDS之间的相关性相反。这一发现表明，TDS对EC有正向影响，而EC对SS有负面影响。结果表明，许多参数，如总氮、总磷、生物需氧量（BOD）和化学需氧量（COD），由于SS的吸附作用而与SS相关。此外，在该淡水水库中还观察到COD与TDS之间存在正相关和负相关。叶绿素a与SS之间的正相关表明，秋季SS浓度的变化是由藻类生长引起的。同时，还观察到SS与气象因素之间存在显著相关性，这表明气象因素对SS动态有影响。本研究提供了有关淡水水库水质参数、SS和TDS与气象因素之间相关性的有用信息。
