AVALIAÇÃO DO GPR NA ESTIMATIVA DA BATIMETRIA DE UMA CAIXA DE DECANTAÇÃO EMPREGANDO O APLICATIVO GRATUITO "GPR BATHYMETRY" NA ANÁLISE DOS RADARGRAMAS/Evaluation of the GPR in the bathymetry estimate of a decanting water treatment plant using the free software "GPR Bathymetry" in the radargrams analysis

This paper aims to evaluate the performance of the GPR (Ground Penetrating Radar) for bathymetric applications in a controlled environment, as well as evaluate the "GPR Bathymetry" software designed to bathymetric radargrams analysis. The study was realized in a decanting water treatment p...

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Bibliographic Details
Published in:Boletim de Ciências Geodésicas 2017-01, Vol.23 (1), p.39
Main Authors: de Faria, Sandro Henrique, Rodrigues, Dalto Domingos, Medeiros, Nilcilene das Graças, Aranha, Paulo Roberto Antunes
Format: Article
Language:Portuguese
Subjects:
Bathymeters
Bathymetry
Decantation
Digital Elevation Models
Freeware
Ground penetrating radar
Interfaces
Performance evaluation
Reinforced concrete
Software
Water treatment
Water treatment plants
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Summary:This paper aims to evaluate the performance of the GPR (Ground Penetrating Radar) for bathymetric applications in a controlled environment, as well as evaluate the "GPR Bathymetry" software designed to bathymetric radargrams analysis. The study was realized in a decanting water treatment plant (WTP), where has the as-built obtained with total station, it will be used in validation tests. Was realized three comparison tests: from points comparisons; from Digital Elevation Models (DEM) generated from interpolating Top to Raster; and between volumes calculated from DEMs. In the point comparison, the greatest difference between averages was 8 cm. For the discrepancies sample between DEMs, the amplitude was 9 cm, average of 2 cm, estimate accuracy of 4 cm and RMS equal to 3 cm. In the volumetric comparison, we obtained the amount of 800.6 m3 with reference data and 806.4 m3 with the GPR data, resulting in a 1% difference between models. We conclude that for a reservoir built in reinforced concrete, depths ranging from 3 to 3.5 meters, the survey of the bottom relief employing a GPR showed promising results and a DEM with an estimate accuracy of 4 cm and discrepancies that may reach 9 cm.
ISSN:1413-4853
1982-2170
DOI:10.1590/S1982-21702017000100003