雨水口截污技术研究进展

On the research advances with the interception technology on the storm-water inlet

雨水口既是城市排水系统的咽喉,又是城市非点源污染进入水环境的重要通道。一旦堵塞,不仅导致排水不畅甚至会造成城市道路积水,还会对城市水体造成污染。建造雨水口截污设施既可以从管网源头控制径流污染物、防止水土流失,又可以防止雨水口堵塞,有效缓解城市内涝。介绍了国内外雨水口截污技术的发展历程,包括雨水口的截污改造、一体式截污雨水口、雨水口截污临时防护。通过比较多种应用于雨水口截污的技术和设施的优缺点,强调了不同雨水口截污技术的适用性。

The present research review intends to provide an intro ductory summary of the current state of the research achievements in the interception techniques of stormwater drain inlet both at home and abroad. So far as we know, there have been achieved three kinds of interception techniques for stormwater drain inlet, that is, the re formed interception of stormwater inlet, the integrated interception of stormwater inlet and the temporary protection for the stormwater inlet intercepted. We have also made a brief introduction of the principle, structure, composition and the operational conditions of the said tech niques as well. In addition, we have also analyzed and made a con clusion over how to compare the pros and the cons in all the schools of the aforementioned techniques, as well as the optimization for stormwater control strategy. Literally speaking, the stormwater drain inlets can be taken as the gates for the urban runoffs, which can also be regarded as the channels for the nonpoint source pollutants to get into the sewage systems since the runoff storm water from the roads may likely to be able to bring about various pollutants, such as the particulate matters, organic matters and heavy metal contents into the drain inlets. And, the next, we have made an analysis of the general and detailed ways for the installation and application of the said inter ception techniques for stormwater drain so as to be able to prevent ef fectively the blockage of storm water drain inlets, and methods for al leviating urban water logs and soil erosion, which is mainly concen trated in preventing the transferring of pollutants in the sewage trans ferring system. The results of the summary and analysis prove that, for the time being, there is no readymade effficientenough technique which can not only effectively treat the pollutants in the runoffs from the roads but also can help to lower the cost for the installation and maintenance of the equipment and facilities concerned. As a matter of fact, it is a challenge for the urban runoffs to be matched with the complexity of controlling technology and in turn the urban pollutant mixtures emanating from an equally complex array of sources should also be well matched with the complexity of installation of the inter ception device so as to bring about convenience and efficiency to the street and community level. Thus, it is hoped that the above said techniques should evolve into a practical and costeffective branch of BMPs selection for an increasing diverse stormwater treatment mea sures and applications.