Drought Propagation in Semi-Arid River Basins in Latin America: Lessons from Mexico to the Southern Cone
A. Scott, Christopher
AffiliationUniv Arizona, Udall Ctr Studies Publ Policy
Univ Arizona, Sch Geog & Dev
standardized drought indices
semi-arid river basins
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CitationOertel M, Meza FJ, Gironás J, A. Scott C, Rojas F, Pineda-Pablos N. Drought Propagation in Semi-Arid River Basins in Latin America: Lessons from Mexico to the Southern Cone. Water. 2018; 10(11):1564.
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AbstractDetecting 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.
NoteOpen access journal
VersionFinal published version
SponsorsBecas 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)