城市内河综合水质对再生水补水的响应

为解析再生水补水对城市内河水质的影响，以合肥市塘西河为例，采用一维水动力水质模型，结合模糊模式识别方法，研究再生水补水位置、水质和补水量对塘西河水质的影响。模拟结果表明：再生水补水改变了河流水动力特征、污染物负荷及其扩散降解过程，影响河流水质空间分布，且对补给点附近的河流水质影响最为显著；通过模糊模式识别分析发现，补给点越靠近上游对河流水质的改善作用越大，提高补水水质或增大补水水量均可进一步改善河流水质。

Comprehensive water quality of urban river in response to reclaimed water recharge

To investigate the effects of reclaimed water recharge on water quality of an urban river, one-dimensional hydrodynamic and water quality models, in combination with a fuzzy pattern recognition technique, were developed to explore how the location, quality, and quantity of reclaimed water recharge regulates water quality of an urban river. Model application to the Tangxi River in Hefei showed that the reclaimed water recharge shaped the hydrodynamic characteristics and pollutant loads, as well as their diffusion and degradation processes, thus affecting spatial distribution of river water quality. The most significant impacts occurred around the location where the river was supplemented with reclaimed water. Fuzzy pattern recognition analysis revealed that the supplementation of reclaimed water upstream had more significant positive impacts on river water quality and that enhancing the quality and quantity of reclaimed water can further advance water quality of an urban river.