供水管网二次污染的因素及改善措施

管网安全供水需要同时满足用户在水质、水量覆水压三方面的要求．符合水质标准的出厂水，经管网输送给用户后．水质常常会发生二次污染．本文从管网管材、管网水自身物化反应、管网附属设施、盲肠段、二次供水设施、管道施工等方面分析了造成供水管网二次污染的原因，并针对这些因素提出了改善管网水质的多项措施和方法．

The Reasons of the Secondary Pollution about the Water Supply Pipeline Network and Improvement Measures

The water supply pipeline network needs simultaneously to satisfy the user such three requests as the water quality, the water volume and the hydraulic pressure. The drinking water could have been secondly polluted frequently after transfer. This article analyzes the reason of secondary pollution from the pipe material, physicochemical reaction of water,facility of pipeline network, blind gut section, facility of secondary water supply, pipiline construction, and aims at these factors to propose many measures and methods to improve water quality.