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在埃及，为维持供水系统的运行，每年都需要运转、养护、更新的大量费用。本文就如何确定这些费用问题，叙述了：包括阿斯旺高水坝在内的巨大灌溉建筑物、泵站和千万条渠道以及排水沟的供水系统；运转、养护、更新的费用估算程序以及该系统费用在各应用部门的效益评价程序；费用分摊模型的发展和应用，部门的效益评价程序；估算系统费用在各用水部门间分配的费用分摊模型的发展和应用。
In Egypt, in order to maintain the operation of the water supply system, a large amount of expenses are required for operation, maintenance and renewal each year. This article describes how to determine these costs: the water supply systems for huge irrigated buildings including the Aswan High Dam, pumping stations and tens of thousands of channels, and drainage ditch; cost estimation procedures for operation, maintenance and renewal, and the System cost effectiveness evaluation procedures in various application departments; development and application of cost allocation models, departmental benefit evaluation procedures; development and application of cost allocation models for estimating system costs among various water use departments.