Study Sites:
River Basins of the Arid Americas

United States: Santa Cruz (factsheet), San Bernardino

Mexico: Sonora (factsheet), Yaqui (factsheet)

Chile: Maipo (factsheet), Elqui/Limari (factsheet)

Peru: Piura (factsheet), Chancay-Lambayeque (factsheet)

Argentina: Mendoza-Tunuyan (factsheet)

Brazil: Pajeu, Capibaribe (factsheet)