城市河流水质组成季节变化规律——以宿州市沱河为例

Water Quality and Its Variation Character by the Season Change in City—A Case Study from Tuohe River in Suzhou City

摘要: 为了解城市河流水质组成特征及其随季节变化规律，搜集了宿州市沱河水质检测数据，对水质特征及其影响因素进行分析，结果表明：不同水化学指标均受到环境不同程度的影响，PH值雨水期最高、冬季较低，DO含量夏季较高，为二类水质，EC、DO和TN在春、秋季含量较高，NH3-N、TP在冬季含量偏高，而BOD在冬季含量较低，COD、Mn受季节影响不大。通过单因子指数评价方法对水质进行评价表明，春、秋、冬三个季节为Ⅳ类水，在夏季为Ⅴ类水，夏季水质变差主要受到温度升过、有机物排放等影响。

Abstract: In order to understand the river water quality in city and their variation characters, the testing data of Tuohe river water were collected in Suzhou city; the characters and influenced factors of water quality were discussed, and the results showed: the different chemical indicators of water quality were influenced by diverse environment factors; in detail, the pH values are highest in rain and lowest in winter, while the DO is higher in summer. EC, DO and TN are all have higher value in spring and autumn, while the NH3-N, TP have higher content in winter. The content of COD and Mn are stable, with the season influencing limited. The single factor index was used to evaluate the water quality, and the results showed the river water could be subdivided as IV in spring, autumn and winter, while in summer the river water quality could be as V, what could be caused by the temperature, organic emission etc.