Validation of chirps gauge – satellite based rainfall dataset over Nicaragua, 2011 - 2021

Authors

  • Jassy D. Rivera Solís Facultad de Tecnología de la Construcción. Universidad Nacional de Ingeniería. Managua, Nicaragua
  • Edwin. A. Ojeda Olivares Universidad Nacional de Ingeniería. Sede Juigalpa. Juigalpa, Nicaragua
  • Francisco E. Chamorro Blandón Facultad de Tecnología de la Construcción. Universidad Nacional de Ingeniería. Managua, Nicaragua

DOI:

https://doi.org/10.5377/nexo.v36i05.17284

Keywords:

Pentadal, NSE, POD, CSI

Abstract

Rainfall is a key input for many weather and climate numerical models. Therefore the strong need to have a dense enough monitoring network for this parameter. Satellite-based rainfall products have emerged in recent decades as an alternative to the more expensive gauge stations. However, a proper validation of such satellite-based products against gauge data must be performed before using their data. This study presents a validation of CHIRPS dataset against gauge data for 17 stations across Nicaragua. The performance of the product was validated at different temporal scales (daily, pentadal, monthly and annual) by different error metrics. A total of six quantitative error metrics was assessed: Bias Percentage (PBIAS), Mean Error (ME), Mean Absolute Error (MAE), Root Mean Square Error (RMSE), Pearson’s r and Nash Stucliffe Efficiency (NSE). A total three categorical indices were assessed at daily time scale: Probability of Detection (POD), False Alarm Ratio (FAR) and Critical Success Index (CSI). The results showed that CHIRPS dataset have better performance at monthly and annual time scales, while it is not capable of adequately represent the daily variability.

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Published

2023-11-30

How to Cite

Rivera Solís, J. D., Ojeda Olivares, E. A., & Chamorro Blandón, F. E. (2023). Validation of chirps gauge – satellite based rainfall dataset over Nicaragua, 2011 - 2021. Nexo Scientific Journal, 36(05), 63–74. https://doi.org/10.5377/nexo.v36i05.17284

Issue

Vol. 36 No. 05 (2023): In commemoration of the 40th anniversary of the founding of the National University of Engineering

Section

Articles

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Copyright (c) 2023 Array

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