城市供水管网漏损是许多自来水公司所面临的共同问题。据最近有关统计数据表明,国内的供水管网漏失率平均达到27%,中小城镇的管网漏失率更是高达35%～42%。同样大连市自来水集团也面临此漏损严重的问题,所以检漏是大连市自来水集团的一项十分重要的工作。 Leakage in urban water distribution networks is a common problem faced by many water utility companies. According to recent statistics, the average water loss rate of domestic water supply network reaches 27%, and the leakage rate of pipelines in medium and small towns is as high as 35% -42%. The same Dalian City Water Group is also facing serious problems of leakage, so leak detection is Dalian City Water Group, a very important task.