【摘要】 人工湿地处理污水已得到广泛的应用，但人工湿地污水处理过程中频繁出现的堵塞问题已严重影响到其持久、高效运行。为解决该问题，本文根据潜流人工湿地结构和堵塞区域的特点，建立了长、宽、高分别为146 cm、119 cm和102 cm水槽物理实验模型，利用地面高密度电阻率法来探测和定位人工湿地堵塞区域。由于人工湿地系统电阻率差异较小，探测结果精度较差，提出一种提高人工湿地系统电阻率差异的方法，探讨了地面高密度电法探测和定位人工湿地堵塞区域的可行性。实验结果表明，未加NaCl溶液的饱和填料电阻率为190Ω·m,加入80 mg/L的NaCl溶液的石英砂填料电阻率为96Ω·m,电阻率差异达到2倍；高阻异常体若具有较大尺寸或顶部埋深与电极间距的比值较小的特点，则地面高密度电阻率法探测效果较好，并且可以通过反演更好地定位高阻体的空间位置和形态。因此，通过在人工湿地中添加电解质溶液(NaCl溶液)可以提高堵塞区域和未堵塞区域的电阻率差异，综合利用视电阻率断面等值线图和反演的电阻率断面等值线图，可以更准确的探测和定位堵塞区域的空间位置。更多还原

【Abstract】 Constructed wetland has been widely used to treat sewage, but the frequent blockage problem in the process of constructed wetland sewage treatment has seriously affected its long-term and efficient operation. To solve this problem, in the light of their structural characteristics and blocking area of subsurface flow constructed wetland, this paper establishes the physical experimental flume model with the length, width and height of 146, 119 and 102 cm respectively, and uses the ground high density resistivity method to detect and locate the blocking area of constructed wetland. Due to the small resistivity difference of constructed wetland system and the poor detection accuracy, a method is proposed to improve the resistivity difference of constructed wetland system, and the feasibility of detecting and locating the blocked area of constructed wetland by ground high density electrical method is discussed. The experimental results show that the resistivity of saturated filler without NaCl solution is 190 Ω·m, and that of quartz sand filler with 80 mg/L NaCl solution is 96 Ω·m, with a 2 times resistivity difference. If the high resistivity abnormal body maintains the characteristics of large size or small ratio of top buried depth to electrode spacing, the ground high density resistivity method has better detection effect, and can better locate the spatial position and shape of the high resistivity body through inversion. Adding electrolyte solution(NaCl solution) to the constructed wetland can improve the resistivity difference between the blocked area and the unblocked area. Comprehensive utilization of apparent resistivity section contour map and inversion resistivity section contour map can more accurately detect and locate the spatial location of blocked area.更多还原