ROJAS Juan Facundo
Drought Propagation in Semi-Arid River Basins in Latin America: Lessons from Mexico to the Southern Cone
MELANIE OERTEL ; FRANCISCO JAVIER MEZA; JORGE GIRONÁS ; CHRISTOPHER SCOTT; FACUNDO ROJAS; NICOLÁS PINEDA-PABLOS
MDPI Open Access Journals
Lugar: Basel; Año: 2018 vol. 10 p. 1564 - 1585
Detecting droughts as early as possible is important in avoiding negative impacts on economy, society, and environment. To improve drought monitoring, we studied drought propagation (i.e., the temporal manifestation of a precipitation deficit on soil moisture and streamflow). We used the Standardized Precipitation Evapotranspiration Index (SPEI), Standardized Streamflow Index (SSI), and Standardized Soil Moisture Index (SSMI) in three drought-prone regions: Sonora (Mexico), Maipo (Chile), and Mendoza-Tunuyán (Argentina) to study their temporal interdependence. For this evaluation we use precipitation, temperature, and streamflow data from gauges that are managed by governmental institutions, and satellite-based soil moisture from the ESA CCI SM v03.3 combined data set. Results confirm that effective drought monitoring should be carried out (1) at river-basin scale, (2) including several variables, and (3) considering hydro-meteorological processes from outside its boundaries.