Evaluating the Performance of CHIRPS Satellite Rainfall Data for Streamflow Forecasting
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Date
2019
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Springer Netherlands rbk@louisiana.edu
Abstract
Streamflow forecasting can offer valuable information for optimal management of water resources, flood mitigation, and drought warning. This research aims in evaluating the effectiveness of CHIRPS satellite rainfall data in comparison with IMD gridded Rainfall Data and development of various flow forecasting models. Daily rainfall data for three decades (1983–2012) over the Nethravathi Basin, Karnataka, India is used for analysis. The analysis is carried out for the monsoon season (June–September), out of which 70% data considered for training the model and remaining for testing. Different input combinations are developed, and soft-computing methods like ANFIS, GRNN, PSO-ANN, and ELM are applied for flow forecasting on a temporal scale. The model performance is evaluated using various statistical indices like NNSE, RRMSE, and MAE. The results indicate that CHIRPS rainfall showed better performance in comparison with IMD data. ELM expressed an enhanced effect when compared to all other methods. The usefulness and effectiveness of CHIRPS data compared to IMD data has been explored. © 2019, Springer Nature B.V.
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Keywords
Chirp modulation, Forecasting, Rain, Satellites, Soft computing, Stream flow, Water management, CHIRPS, Model performance, Optimal management, Satellite rainfall data, Satellite rainfalls, Soft computing methods, Statistical indices, Streamflow forecasting, Information management, algorithm, computer simulation, flow modeling, forecasting method, rainfall-runoff modeling, satellite data, satellite imagery, streamflow, India, Karnataka, Netravathi River
Citation
Water Resources Management, 2019, 33, 11, pp. 3913-3927