O potencial de captação de água de chuvas: uma proposta para o uso de modelagem matemática.

Abstract

This research sought to estimate the potential of rainwater harvesting for non - potable use in buildings of the CDSA/UFCG. Within this theme, it was proposed a mathematical modeling project as a teaching-learning strategy, associated to the problematization and investigation of the reality which the students are inserted. The totals of the monthly consumption of drinking water and the coverage area of the Class Central I and II and the daily precipitation totals, between 1994 and 2017, were used, provided by the Executive Agency for Water Management of the State of Paraiba (AESA). The Quanti’s technique characterized the months from July to December as a critical period, subject to few rains. In the statistical analysis, the months of March to June stand out as the period of maximum peaks of the average monthly precipitation. However, in the other months the monthly precipitation is irregularly distributed, since the standard deviation has values greater than the means and the medians in almost every month. The Rippl and the Azevedo Neto Methods, applied to size the capacity of rainwater reservoirs, suggest that a reservoir with a volume varying between 71 and 84 m3, should theoretically meet the needs of the current non-potable water consumption of the two CDSA Class Central. The analysis of the cumulative volume of collected water and the cumulative demand imply adequate storage capacity between supply and demand over a period of one year. After all the steps of this research, the subject of drinking water showed how this subject is rich in mathematical information, which motivated the proposal for the development of mathematical modeling.