Long-term variations of water quality in a reservoir in China
Long-term variations of water quality in a reservoir in China
复制标题
我国水库水质长期变化
DOI：
10.2166/wst.2012.034
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发表时间：
2012-01-01
影响因子：
2.7
通讯作者：
Wang, L. Y.
中科院分区：
文献类型：
--
作者：
Chen, Y. Y.;Zhang, C.;Wang, L. Y.
为了研究天津市暨县于桥水库水质的时空变化趋势，收集了1989~2007年3个监测站(S1、S2、S3)和1999~2007年3个监测站(S4、S5、S6)10个物理化学参数的水质数据。采用单因素方差分析方法评价各站点水质的空间变异。结果表明，除温度和溶解氧外，大部分水质参数在整个水库内都存在显著的空间差异，且大多数参数在水库最上部的浓度较高。时间趋势研究采用季节性-肯德尔检验进行。结果显示，从1989年到2007年，水质有改善的趋势，包括总磷、温度和生化需氧量的减少，以及溶解氧的增加。较高的N：P值在52.61~78.75之间，表明该水库为磷限制环境。这项研究揭示了于桥水库水质的长期时空变化，这可能为水质管理人员和科学家提供信息。
To study the spatial and temporal trends of water quality in the Yuqiao Reservoir (Ji County, Tianjin) in China, water quality data for ten physical and chemical parameters from three monitoring stations (S1, S2 and S3) was collected from 1989 to 2007 and from an other three stations (S4, S5 and S6) during the period of 1999-2007. A one-way ANOVA was employed to evaluate the spatial variation of water quality for each station. The results showed that there were statistically significant spatial differences for most water quality parameters except temperature and dissolved oxygen in the entire reservoir, and the concentrations of most parameters were higher in the uppermost part of the reservoir. The temporal trend study was conducted using the Seasonal-Kendall's test. The results revealed improving trends of water quality from 1989 to 2007, including a reduction of total phosphorous, temperature and biochemical oxygen demand and an increase of dissolved oxygen. High N:P ratios, ranging from 52.61 to 78.75, indicated that the reservoir was a phosphorous-limited environment. This study suggests long-term spatial and temporal variations of water quality in the Yuqiao Reservoir, which could be informative for water quality managers and scientists.