摘要目的 了解2005年甘肃省改水降氟设施运行使用现状,为进一步完善管理机制和提高降氟工程效益提供依据.方法 对甘肃省33个重点病区县已建成的改水降氟设施运行情况(基本正常、间歇使用、报废)和非正常运行原因进行调查.水氟测定采用氟离子选择电极法.结果 共调查改水降氟工程993处,覆盖3389个病区村,改水工程类型以打井和引水为主;其中水氟合格且运行基本正常的工程仅682处,占68.68%(682/993),覆盖2174个村,占病区村的64.15%(2174/3389),实际受益人口116.56万人,有311处工程间歇使用或报废,而不能发挥防病作用,占31.32%(311/993),主要原因是超过使用年限、水源不足、水氟超标和管理不善.结论 甘肃省大部分改水工程运行基本正常,但有近1/3的工程处于非正常运行状态,工程管理亟待改进和完善.

abstractsObjective To evaluate the running status of the water-improving projects in Gansu Province in order to further improve the supervising mechanism and raise the efficiency of defluoridation in drinking water.Methods The water-improving projects,either being normal,or intermittent,or discarded and the cause of abnormal running in 33 counties in Gansu Province were surveyed with unified standard method.Fluoride content in water was determined by F-ion selective electrode.Results 993 water improving projects covering 3389 fluorosis villages were surveyed,682 projects worked well[68.68%(682/993)]and had supplied water with normal fluoride contents to 2174 villages[64.15%(2174/3389)]and benefited 116.56 hundred thousand populations.And the rest 311[31.32%(311/993)]projects worked abnormally or supplied unqualified fluoride water.The main causes were the exceeded lasting life,insufficiency of water resources,high fluoride content in water and unqualified administration.Conclusions Most of the water-improving projects in Gansu Province are basically running normally,but about 1/3 of the projects do not function well,so the management of the projects must be improved and consummated.