Agreement analysis of precipitation data estimated by Remote Sensing in mesorregions of the state of Pernambuco - Brazil

Authors

DOI:

https://doi.org/10.55761/abclima.v36i21.19499

Keywords:

Hydrological Monitoring, CHIRPS, GPM-IMERG, Statistical Validation

Abstract

The most common way to measure precipitation is through ground-based rain gauges. However, such monitoring systems present some operational difficulties. In this context, precipitation measurements by Remote Sensing offer an effective and low-cost alternative, demonstrating the ability to solve existing difficulties in each region. This research aims to analyze the agreement of CHIRPS and GPM-IMERG satellite products in two mesoregions of the state of Pernambuco, Brazil, on daily, monthly and annual time scales. For this purpose, well-established statistical methodologies were used, such as Root Mean Square Error (REMQ), Nash-Sutcliffe Efficiency (NSE), Percent Bias (PBIAS), Pearson's Correlation Coefficient (r) and Willmott's Index of Agreement (d). From the results, it was identified that CHIRPS presented a greater capacity to approach the values measured by the rain gauges when compared to GPM-IMERG. The CHIRPS r and d values were better than those of GPM-IMERG for monthly and annual data, however, regarding daily data, GPM-IMERG presented slightly better values. In relation to PBIAS, it was observed that CHIRPS has a tendency to underestimate precipitation values, while GPM-IMERG tends to overestimate them.

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Author Biographies

Frederico Antonio Peregrino Wanderley da Costa Neto, Federal University of Pernambuco

Agricultural and Environmental Engineer graduated from the Federal Rural University of Pernambuco (UFRPE), in 2020 and pursuing a master's degree in Civil Engineering from the Federal University of Pernambuco (UFPE). I currently work in the area of ​​Water Resources consultancy, assisting in the development of projects, audits and consultancy for tailings and waste rock dams and drained piles. I also work with sizing surface drainage systems and evaluating their hydraulic safety.

Camila Oliveira de Britto Salgueiro, Federal University of Pernambuco

Civil Engineer from the Federal University of Pernambuco (2021), with participation in the Institutional Program for Initiation Scholarships in Technological Development and Innovation (PIBIT) in 2017-2018, in the Institutional Program for Scientific Initiation Scholarships (PIBIC) in 2018-2019 and monitoring in the Applied Hydrology 1 discipline, from the Civil and Environmental Engineering department during the semester of 2019.2. He is currently a Product Assistant at TPF Engenharia LTDA, starting in June/2021, developing activities focused on Water Resources and Geotechnics in the area of ​​dams.

Rebecca Borja Gonçalves Gomes de Menezes, Federal University of Pernambuco

Holds a bachelor's and master's degree in Civil Engineering from the Federal University of Pernambuco (2021). She worked as a scholarship monitor for Technical Drawing 3 in 2018 and also as a volunteer monitor for Three-Dimensional Graphic Geometry in 2017. She was part of the junior company Prisma Consultoria e Projetos de Engenharia working in the area of ​​People Management and in the execution of engineering projects. He interned at the National Electric System Operator in the Water Resources area, where he developed his knowledge in the area of ​​hydraulic programming and flow forecasting.

Sylvana Melo dos Santos, Federal University of Pernambuco

Has a degree, master's degree and doctorate in Civil Engineering from the Federal University of Pernambuco (UFPE), with a period of 2 years of studies (sandwich doctorate) in Germany (Institut für Erdmessung - Universität Hannover). She is currently a Full Professor at UFPE, Department of Civil and Environmental Engineering. Permanent member of the Postgraduate Program in Civil Engineering (PPGEC) at UFPE, the Postgraduate Program in Civil and Environmental Engineering (PPGECAM) at UFPE and the Professional Master's Degree in National Network in Management and Regulation of Water Resources (ProfAgua) . He coordinated PPGECAM from 2010 to 2012 and ProfÁgua (UFPE) from 2019 to 2021. Coordinates/acts on projects in the area of ​​Civil Engineering, with an emphasis on Hydrology, mainly on the following topics: groundwater, soil subsidence, alternative technologies for semiarid region (cisterns) and compensatory techniques for urban drainage (ecological roofs).

Leidjane Maria Maciel de Oliveira, Federal University of Pernambuco

PhD in Civil Engineering from the Federal University of Pernambuco - Environmental Technology and Water Resources (2012), Post-doctorate in Civil Engineering from the Federal University of Pernambuco (UFPE), Master's degree in Civil Engineering from the Federal University of Pernambuco - Environmental Technology and Water Resources ( 2007) and a degree in Civil Engineering from the Catholic University of Pernambuco (1991). She is currently an Adjunct Professor at the Federal University of Pernambuco - Center for Technology and Geosciences (CTG) - Department of Civil Engineering, Permanent Member of the Postgraduate Program in Civil Engineering (PPGEC), Permanent Member of the Professional Master's Degree in the National Network in Management and Water Resources Regulation (ProfÁgua). He was a Permanent Member of the Postgraduate Program in Geodetic Sciences and Geoinformation Technologies at UFPE from 2016 to 2021. He was a DTI scholarship holder - Study and Project Financier - FINEP and the National Council for Scientific and Technological Development-CNPq of the BEER/REHISA Project and Distance Tutor in Water Resources Management in the Technology in Environmental Management Course by the Open University Program of Brazil - UAB with the executing body being IFPE - Federal Institute of Education, Science and Technology of Pernambuco. He has experience in the area of ​​Civil Engineering, with an emphasis on Environmental Technology and Water Resources, working mainly on the following topics: Hydrology, remote sensing, water resources, experimental basin and lysimetry.

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Published

21/04/2025

How to Cite

Peregrino Wanderley da Costa Neto, F. A., Oliveira de Britto Salgueiro, C., Borja Gonçalves Gomes de Menezes, R., Melo dos Santos, S., & Maria Maciel de Oliveira, L. (2025). Agreement analysis of precipitation data estimated by Remote Sensing in mesorregions of the state of Pernambuco - Brazil. Brazilian Journal of Climatology, 36(21), 452–477. https://doi.org/10.55761/abclima.v36i21.19499

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Vol. 36 (2025)

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