【作者】 叶守杰；

【导师】 刘丹；

【作者基本信息】 西南交通大学 ， 环境工程， 2002， 硕士

【摘要】 集取河床渗透水的渗滤取水技术是最近几年才发展起来的一项傍河取水新技术。本论文针对渗滤取水工程中水量计算不准确这一问题，进行了如下的探讨和研究： (1) 结合某渗滤取水工程现场模拟试验，并以多孔介质地下水渗流的基本原理为指导，对试验的渗流场特征进行分析。 (2) 根据试验的渗流场特征，建立试验的水文地质数学模型，应用Modfolw进行数值模拟。 (3) 对渗滤取水的取水量影响因素分析。首先探讨了滤床地下水的水动力特征对取水量的影响。第二，应用试验建立的渗滤取水水文地质数学模型，对渗滤取水的取水量影响因素进行数值模拟分析。 研究表明： (1) 渗滤取水的渗流场具有典型的饱和三维稳定流特征；渗滤取水滤床中地下水与河流的水力联系比较紧密，滤床中的地下水处于承压状态。 (2) 根据试验所建立的饱和三维稳定流数学模型是适用的。 (3) 滤床堵塞和泥膜增厚可能产生滤床中水动力特征的改变，会产生非饱和流导致出水量的衰减。 (4) 滤床的渗透性能越好，河床水力传导系数越高，河水水位越高，取水面积越大，取水管之间的间距越大，则最大取水量越大；水位降深与取水量成正比关系。更多还原

【Abstract】 The technique of infiltration diversion near the river,collecting the water from the riverbed,is a new one developed in recent years. To solve the problem that the water quantity can not be calculated correctly,the following researches were made:(1) Discussing the properties of the on-site experimental seepage flow field of one infiltration diversion project guided by the basic theory of groundwater flow in porous media.(2) Establishing the mathematical model of hydrology based on the analysis of seepage flow field of the experiment and doing the numerical simulation with Modflow.(3) Analyzing the factors that influence the water quantity. Firstly,study the hydrodynamic properties in the filtering bed;secondly,analyze the influencing factors by the method of numerical simulation with the above mathematical model.The researches indicated:(1) The seepage flow field of infiltration diversion is characterized by three-dimensional,saturated and steady flow. There is the close hydraulic relationship between the river and the groundwater in the filtering bed,and the groundwater is confined.(2) The three-dimensional,saturated and steady mathematical model established on the basis of the experiment is applicable.(3) The blockage of filtering bed and the thickening of the argitan can cause the change of hydrodynamic properties in the filtering bed,which leads to the decrease of water quantity.(4) The maximum water quantity becomes greater,the better is the filtering bed permeability,the higher the river hydraulic conductance,the higher the river level,the larger the water-collecting area and the bigger the distance between collecting pipes. The water quantity varies directly with drawdown.更多还原