Simulation of the use of rainwater in two schools in the public municipal education network in Aracaju-SE

With an increasing frequency periods of intense water scarcity are recorded in various parts of the planet. A measure that can be very efficient, is using rainwater, preserving potable water for use where it is needed, and contributing to the fight against urban floods. Considering the foregoing, this article aims to capture’s simulation and use of rainwater in two schools of the public municipal education network of Aracaju-SE, through the estimation of non-potable demand, estimation of the catchable volume, verification of the attendance of the estimated non-potable use and the impact of this action on the urban drainage system. Based on the roof area and the average’s data of precipitation, the volume of water captured by the roof was calculated, and finally, a demand for non-potable use was estimated, verifying if this demand is attended, in addition, the impact generated on the local urban drainage system was analyzed. The results indicate that: a) The Oviedo Teixeira School had an average demand of 258 m³, an average catchable volume of 326 m³ and an average reduction of 66% in the volume thrown into the drainage; b) The Anísio Teixeira School had an average demand of 60 m³, an average catchable volume of 140 m³, and an average reduction of 53% in the volume thrown into drainage. It is concluded that rainwater totally meets the estimated demand and rainwater harvesting positively impact on the drainage system, if used on a large scale.