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)