【摘要】 通过建立地下水数学模型,回答了土壤渗滤工程运行控制中的两个难点问题:(1)工程运行水力负荷。当工程地块周边存在河流时,河流水位低时,有助于增加水力负荷,反之则降低水力负荷;实际土壤运行面积的增加和独立运行单元之间的间距增加也能够增加工程运行水力负荷。(2)地下水水质监测井的优化布设。模拟工程运行后地下水水质空间分布特征,在地下水水质最不利的位置和其他特别关注的位置布置监测井,从而能够以具有典型代表性且数目较少的监测井达到准确评估工程对地下水水质影响的目的。更多还原

【Abstract】 A groundwater model, including appropriate terms for the subsurface adsorption, desorption and degradation of the target compounds as well as water exchange with rivers, was developed to simulate/predict flow and quality of groundwater in the area affected by the operation of a soil infiltration sewage disposal system in Chongming Island near Shanghai. The simulation results show that a higher hydraulic loading can be applied when the river’s water level is lower than normal and that the total disposal capacity increases with a larger application area and/or more distance between the operating units. The model simulations may be employed for locating the monitoring wells at strategic points to result in the least number of wells required for an cost effective groundwater monitoring program.更多还原