Renata Coura Borges
Researcher, Instituto Nacional de Tecnologia, Brazil
Title: The application of the GIS and IDW interpolator on the evaluation of environmental impacts on different matrixes and regions
Biography
Biography: Renata Coura Borges
Abstract
The Geographic Information Systems (GIS) are powerful computational tools, which allow the performance of complex analysis by integrating data from multiple sources and creating geo-referenced databases. Due to its wide range of applications, including topics such as agriculture, forestry, environment, cartography, urban registers, among others. There are at least three major ways to use GIS: as a tool for map production; as support for phenomena spatial analysis; and as a geographic database. The method of Inverse Distance Weighting interpolation (IDW) estimates the values of un sampled points by averaging the values of surrounding sampled points. This study aims to show the GIS application capacity on the environmental field through the use of IDW interpolation, the spatial distribution of lead (Pb) and nickel (Ni) in of Cunha Canal Watershed and West of Guanabara Bay-RJ, by building thematic maps for identification of the possible leach of rare earth elements on the phosphogypsum stacks in Imbituba-SC and also provide radionuclide distribution in soils maps of Fundão Island-RJ. Specific analytical techniques were used, Guanabara Bay was analyzed with the Optical Emission Spectrometry with Inductively Coupled Plasma; Imbituba and Fundão Island were analyzed with Gama Spectrometry. Using the IDW and GIS, high efficiency maps were generated to clearly inform the contamination which occurred in different evaluated areas of study in this work