Journal
WATER
Volume 10, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/w10111564
Keywords
drought assessment; drought propagation; standardized drought indices; semi-arid river basins; Latin-America
Categories
Funding
- Becas Conicyt
- Becas Conicyt, Programa de Formacion de Capital Humano Avanzado, Ministerio de Educacion de Chile
- Inter-American Institute for Global Change Research (IAI) - US National Science Foundation [CRN3056, GEO-1128040]
- Lloyd's Register Foundation (a charitable foundation helping to protect life and property by supporting engineering-related education, public engagement and the application of research)
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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-Tunuyan (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.
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