重力供水系统在非洲城市供水工程设计中的应用

Typical application of gravity flow system in Africa urban water supply design

介绍了非洲某国首都N市某供水工程的设计概况.项目充分结合了当地的地形和水文条件,在城市北部山区拦河建坝作为城市的一个供水水源,原水重力流到给水厂经处理后,重力输送至供水区域的高位水池,再由高位水池进行配水.整个系统从原水输送、净化处理、清水输配均采用重力自流,单位制水成本仅为0.03美元/m^3,较好地契合了当地城市的特点,满足了供水的需求.

A water supply system design in a capital city in Africa was introduced.With local topography and hydrological conditions fully integrated in the project,a dam was constructed in north mountain area of the city as one of raw water sources for the city,raw water from the dam to water treatment plant by gravity was treated in water treatment plant and thereafter the treated water was transmitted to high level reservoir in targeted water supply area from which treated water was distributed.The gravity flow was adapted for the whole system including raw water transmission,water treatment and treated water transmission and distribution,so low unit water operation cost was obtained in USD 0.03 per cubic meter,which fitted the characteristics of African cities and met the local water demand.