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WATCOST: Manual for a Costing Model for Drinking Water Supply Systems
Expanded Title:This project developed a user-friendly costing model, “WATCOST”, for estimating costs of drinking water supply systems. This allows economic comparison between different water treatment and supply options being considered for a water supply scheme(s). It further also allows costing reports to be done for existing water treatment systems, which assists with budgeting and asset management processes. The aim of WATCOST is two-fold: firstly, the manual can be used as a reference document for information on costing data for water supply projects, with actual costing figures that can be obtained from the tables and graphs in the document. Secondly, the manual is also an aid when using the WATCOST Model to obtain costing data for water supply projects, either in total or for specific components in the drinking water supply cycle. The WATCOST Costing Model is available electronically, downloadable from the WRC website. The electronic copy of the model contains the following: User Instructions, Input Component (where the user will enter required information), Software that will do the cost calculations – the Model Component, Output Component (that will provide the tables and graphic costing results), and a Database of costing information (not accessible to the user, only for doing cost calculations). The WATCOST Model is aligned with the DWA Costing Model, so that it can be integrated with this model as required. An additional document was also drawn up for unit costs of municipal services (CoGTA (2010) “An Industry Guide to Infrastructure Service Delivery Levels and Unit Costs”). Costing data for water services in the Industry Guide is an extension of the costing data contained in the DWA Benchmark Document, 2009, which is the document describing the unit costs derived from the DWA Costing Model. According to the Industry Guide (CoGTA, 2010) cost benchmarks are often required for different purposes and at different levels of detail. They serve primarily as a reference or check for evaluation of conceptual project plans and project proposals. They can also be useful references for regional and national budgeting and strategic planning. However, such figures should not be used for detailed cost calculations in feasibility studies or business plans, and definitely not for tendering purposes. For such purposes, site specific design information and material costs should be gathered and prepared.
Date Published:01/04/2013
Document Type:Research Report
Document Subjects:Drinking water - Water supply, Sanitation - Hygiene
Document Format:Report
Document File Type:pdf
Research Report Type:Technical
WRC Report No:TT 552/13
ISBN No:978-1-4312-0401-4
Authors:Swartz CD; Thompson P; Maduray P; Offringa G; Mwiinga G
Project No:K5/1992//3
Organizations:Chris Swartz Water Utilisation Engineers; Umgeni Water; GO Water Management, Somerset West; Development Bank of Southern Africa
Document Size:2 546 KB
Attachments:WATCOST Model - User version.xlsm
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