地下水补给影响下的河流水质模糊模拟  

Fuzzy simulation of river water quality considering groundwater recharge

作　　者：李如忠[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《水利学报》2010年第4期429-436,共8页Journal of Hydraulic Engineering

基　　金：安徽省科技攻关计划重点项目(07010302165);安徽省自然科学基金项目(050450303)

摘　　要：基于河流水环境系统的模糊性、不精确性,采用三角模糊数描述和表征沿岸地下水水文地质参数,建立了计算地下水补给量和补给强度的模糊模型。并进一步在三角模糊数的基础上,构建了考虑地下水补给影响的一维稳态河流水质模糊模拟模型。将该模型应用于淮河流域某支流的水质模拟研究。计算中采用α-截集技术,得到了各控制断面模糊数形式的污染物浓度值,并将其与确定性模型计算结果进行对比分析。分析结果表明,以三角模糊数原理模拟和表征考虑地下水补给影响的河流水体污染物浓度变化规律在理论上可行,其计算结果可信。In view of the characteristics of vagueness and imprecision of river water environmental system,triangular fuzzy sets were employed to denote and deal with the uncertainties of hydrogeological parameters along the river bank.A fuzzy model was proposed for determining the groundwater recharge amount and replenishment intensity.On this basis,a one-dimensional fuzzy analytical model for describing the river water quality that considering the influence of groundwater recharge was established.The fuzzy models were applied to the water quality simulation of a river,located in the Huaihe River basin.By means of α-cut technique of fuzzy set theory,the computation result of water quality in the downstream cross-sections of the river,expressed in fuzzy numbers,were obtained and compared with that of deterministic water quality model.The results show that the proposed models is feasible and reliable for simulating the river water quality with the influence of groundwater recharge taken into account.

关 键 词：地下水补给 水质模拟 三角模糊数 不精确性 

分 类 号：X522[环境科学与工程—环境工程]