中文摘要：

以管道更新前后管网维护费用降低最大为目标，建立了考虑和不考虑异型管两种情况下的管道更新资金分配模型。实例验证了该模型能够在充分利用维护资金的前提下，最大限度地降低管网漏失损失，为供水管理部门合理使用资金、有效控制漏损和产销差率提供理论支持和决策指导。

英文摘要：

A fund distribution model for water pipeline replacement at the level of limited fund is established. By analyzing maintenance fee of pipe network and construction fee, and decreasing the difference of pipeline maintenance fee before and after replacement at the most, the pipeline needed to be replaced is determined. The establishment of model makes construction fund be utilized fully, and decreases pipeline leakage loss most effcfivedy, and provides theoretical support and guidance for water supply department to utilize fund reasonably, control leakage loss and production and marketing difference ratio effectively.