Operational methodology to obtain historical rainfall data from the satellite Tropical Rainfall Measuring Mission. Validation of results with rain gauge data.

SEBASTIAN GAVILAN; ANABELLA FERRAL ; JUAN IGNACIO PASTORE; ANDRÉS LIGHEZZOLO; JAVIER URANGA; PABLO ACEÑOLAZA

Revista de la Facultad de Agronomía, Universidad Nacional de la Plata

Facultad de Ciencias Agrarias y Forestales, UNLP, Argent

Lugar: La Plata; Año: 2019 vol. 118 p. 115 - 125

0041-8676

Precipitation information is critical for understanding the hydrological equilibrium on a global scale. Rain, with other conditions, represents a factor of interest for agricultural production. Therefore, the need of carrying out studies that make possible to understand spatial and temporal variability of rain becomes evident. This paper presents a methodology that allows the automatic downloading of time series of precipitation data from the Tropical Rainfall Measurement Mission (TRMM) from the Google Earth Engine (GEE) platform and validate it with a series of meteorological data. The system was developed under the GEE platform for downloading the TRMM data. As a case of study, the Arroyo Las Conchas basin in the Entre Ríos province, in Argentina was established. To validate the results, a set of data was generated with rainfall information in 16 year period, by measuring the rain gauges for the area of influence at the meteorological station in the Instituto Nacional de Tecnología Agropecuaria (INTA) Station at Oro Verde, Paraná, Entre Ríos, Argentina. The results through the evaluation process show a close relationship between both sources of information. The proposed methodology will allow generating sets of historical rainfall data to study the hydrological regime of the Las Conchas Stream basin.