Viabilidade econômica de alternativas para atendimento da demanda de água em Natal/RN
Water loss is a problem that affects water supply systems throughout world and generates serious impacts on the water supply sector in the municipalities and calls into question the quality of work and the sustainability of service providers. In the municipality of Natal / RN, the water loss rate...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/37138 |
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| Resumo: | Water loss is a problem that affects water supply systems throughout world and generates
serious impacts on the water supply sector in the municipalities and calls into question the
quality of work and the sustainability of service providers. In the municipality of Natal / RN,
the water loss rate has varied around 55% in the last decade and the main causes of these losses
have been identified as irregular consumption through clandestine connections, old networks,
in addition to the lack of micro-measurement, causing lack of water in the communities and
annual loss of revenue from the service provider. In order to maintain the proper functioning of
the supply system and avoid water collapse, this study aimed to comparatively evaluate the
economic viability among the alternatives proposed for the city of Natal: to reduce the rate of
physical losses or to use new water sources through the implantation of a water main.
underlying river basins. To meet the demands, the implementation of a pipeline to import water
from the Maxaranguape River basin, which is 30 km from Natal and has sufficient surface
water, in quantity and quality, was used as a proposed alternative. current Christmas demands.
In this context, the present work projected the population and the water demands necessary for
the city of Natal to reach 20 years, through two different scenarios, one with loss reduction
according to goals established in the Municipal Basic Sanitation Plan (PMSB) in Natal and the
other maintaining the current loss rate and importing water through the design of a new pipeline.
The amount of R $ 462,193,557.48 was obtained for the implementation of all goals for
reducing the loss indexes through a 37% adjustment with the National Civil Construction Cost
Index (INCC) and R $ 162,391,178.70 for the implementation of the pipeline considering
materials, equipment and services, based on the National System of Prices and Indices for Civil
Construction. The alternative that showed the best economic feasibility among the proposed
measures was the implementation of the pipeline, which has any less costly value than the
implementation of meeting the goals for reducing losses. However, the pipeline has fixed
operating costs, which in the long run, have reached total values to meet all loss reduction
actions. Thus, the reduction of the loss rate is the most sustainable option for the project horizon,
considering that the fulfillment of the goals established by the PMSB will provide flow rates
higher than the demanded consumption and avoid the waste of the water resource, preserving
the environment. |
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