Proposta de exploração do Sistema Aquífero Serra Geral (SASG) e Sistema Aquífero Guarani (SAG) em Londrina-PR para o abastecimento público

Abstract

The continuous economic and population development in the municipality of Londrina, Paraná, triggered an increasing demand of water for supply in all sectors of activities. In view of this, it was evidenced the need for studies that evaluate the underground water sources as an alternative source of water supply. The objective of this study was to present different scenarios for the exclusive exploitation of the Guarani Aquifer System (SAG) and the Serra Geral General Aquifer System (SASG), aiming at municipal public water supply in order to assist, based on urban planning, the management of water resources. Data were collected from SIAGAS and the sanitation company in relation to the several deep tubular wells located in Londrina, Paraná, as well as the volumes of water currently exploited. Based on the population projections of each scenario, a calculation base was constructed for the water demand, the total costs of the work, as well as the economic comparison with the current system of abstraction and distribution. Underground springs were more advantageous, with the cost of m³ of groundwater varying between R $ 0.189 in SASG and R $ 0.45 in SAG, when compared to the average cost of R $ 0.68 of surface water sources, average reduction for the year 2040 of 33% in the SAG scenario and greater than 67% in the three scenarios presented in the SASG. It was possible to conclude with the present work that the underground water sources of the municipality are able to be used for public supply, generating a reduction in production costs, besides benefiting the population, helping to guarantee access to drinking water, improved quality of life and possible reduction in the value of water supply services.