Pontificia Universidad Católica de Chile Pontificia Universidad Católica de Chile
Oertel M., Meza F.J., Gironás J., Scott C.A., Rojas F. and Pineda-Pablos N. (2018)

Drought propagation in semi-arid river basins in Latin America: Lessons from Mexico to the Southern Cone

Revista : Water
Volumen : 10
Número : 11
Páginas : 21pp
Tipo de publicación : ISI Ir a publicación


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-basinscale, (2) including several variables, and (3) considering hydro-meteorological processes from outside its boundaries.