论文部分内容阅读
本篇报告一种阻止蚊虫从其孳生地——下水道飞出或飞进下水道内的物理防制方法。该实验区位于弗雷斯诺城内2km长的下水道干线上。该段下水道设有20个人孔室,并借侧管与21个斜底集水池相连。人孔室彼此之间的距离为50～250m。屏障物装置于侧管的出水口或入水口处,根据不同的情况而定。屏障物为一牢固的两端开口的尼龙袖,长110cm。其一端的开口需略大于水泥侧管的口径。在装置时,先将该端尼龙袖塞入侧管洞口内,再卡入一弹簧钢圈(1.0～1.5mm厚,3.2mm宽)以便使尼龙袖口的周边紧贴于侧管的内壁。装于侧管出水口处的尼龙袖,
This report presents a physical control method that prevents mosquitoes from flying out of their sewer or into a sewer. The experimental area is located on the 2km long sewer line in Fresno. This section of sewer with 20 personal cells, and by the side of the tube and 21 inclined bottom catchment connected. The distance between the manholes is 50 ~ 250m. Barrier device at the side of the outlet or water inlet, according to different circumstances. The barrier is a solid, open-ended nylon sleeve that is 110cm long. The opening at one end should be slightly larger than the diameter of the cement side pipe. At the time of installation, the nylon sleeve at the end is first inserted into the hole of the side tube, and then a spring steel ring (1.0-1.5mm thick and 3.2mm wide) is inserted so that the periphery of the nylon cuff tightly adheres to the inner wall of the side tube. Installed in the side tube outlet nylon sleeve,