Ferramenta on-line para consulta e estimativa de recarga aquífera (FOCER): desenvolvimento e aplicação

Abstract

In view of the strategic importance attributed to groundwater, its exploitation for consumption purposes in the Grande and Corrente river basins in the area of influence of the Urucuia Aquifer System, and the current gap in the National Water Resources Information System about a tool capable of helping to obtain quantitative data on the recharge rate and base flow, fundamental parameters to support studies, plans and projects that aim to implement good practices of water resources management, this work proposed, developed and applied an online tool following the templates of web applications adopted by the National Water and Sanitation Agency, allowing quick consultation of base flow values and aquifer recharge rates, constantly updated based on data collected by the National Hydrometeorological Network. As the methodology used to estimate the recharge values, the base flow separation method was adopted through the application of numerical filters. The filters implemented in the developed tool are the Eckhardt and Lyne & Hollick filters, which are very well suited to the study area where the base flow contribution is significant due to the Urucuia Aquifer System, and Chapman & Maxwell, which although it does not present good suitability for the study area can be applied to other situations commonly observed in Brazilian water courses that do not present significant baseflow contribution. In addition, the developed tool also allowed the user to enter their own data, which is a positive factor to expand its use, in addition to providing the essential input for the application of numerical filters, previously calibrated for the study area through a web map application integrated into the tool. The developed tool was submitted to a comparison of its results with tools that are already established in the market, where it presented similarity with the results obtained.