Abstract
The most relevant challenges in the water supply system (WSS) are high water losses and the waste of electric energy. This paper aimed to assess the capacity of the Geographic Information System (GIS) in the analysis of the hydro-energy performance of WSSs. The Stage 1 comprises the selection of data and the respective hydro-energy indexes are defined; cartographic data are defined in Stage 2 and a geo-referenced database is constructed in Stage 3. In the stage 4, the data of the Central Water Supply Zone administered by the Water Works Company of the state of Para in Belem, Brazil were employed to assess its applicability, in which the sectors with the worst hydro-energy performance were identified, such as Sector 9, with the highest water loss rates (59.11%) and electric energy consumption per m 3 of water produced (1.57 kwh m - ³). The results shows that geo-referential assessment of the hydro-energy performance of WSSs provided accurate information for decision-taking related to the rational use of water and electricity in the systems.
Highlights
The electricity, one of the most relevant products in the Water Supply System (WSS), is targeted for several types of control and costs saving. Barry (2007) reports that pumping systems causes the highest consumption and expenditure rates of WSS electric energy, which, according to the Brazilian Information System on Water Works (SNIS), totaled BRL 3,070.6 million, or 10.9% of total water expenditure
Geographic Information System (GIS) was applied to WSSs in downtown Belem, Brazil, according to methodology described above
The layer ‘Adductors’ is composed of cartographic items in the shape of a line, representing the WSS pipelines; the layer ‘Units’ is composed of items in the shape of points / which represent WSS units; the layer ‘Sectors’ is composed of cartographic items in the shape of polygons which represent the limits of the WSS sectors (Figure 3)
Summary
The electricity, one of the most relevant products in the Water Supply System (WSS), is targeted for several types of control and costs saving. Barry (2007) reports that pumping systems causes the highest consumption and expenditure rates of WSS electric energy, which, according to the Brazilian Information System on Water Works (SNIS), totaled BRL 3,070.6 million, or 10.9% of total water expenditure. Barry (2007) reports that pumping systems causes the highest consumption and expenditure rates of WSS electric energy, which, according to the Brazilian Information System on Water Works (SNIS), totaled BRL 3,070.6 million, or 10.9% of total water expenditure. The electricity, one of the most relevant products in the Water Supply System (WSS), is targeted for several types of control and costs saving. It ranks second, below expenditure with personnel, with BRL. The data above reveals that hydraulic and energetic efficiency are crucial for the performance of the water supply systems
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