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Portal Friday, April 4, 2025    13:12 hr   PDT  [UTC - 7]   About New Subdomains Videos Search/Index Contact Contact Us 100.  General 200.  Research 300.  Publishing 400.  Learning 500.  Biodata 600.  Restricted 700.  Reports 800.  Lectures 900.  Personal To refresh picture Rio Papaloapan, at Tlacotalpan, Veracruz, Mexico (2007)  210.  Ojos Negros valley 220.  Tlaxiaco constructed wetland 230.  Alamar hydrology 240.  Alamar hydroecology 250.  Alamar sustainable architecture 260.  Tecate Creek restoration 270.  Vitor valley 280.  Groundwater sustainability studies 290.  Ecohydrological studies Iguaçu Falls, on the Iguaçu river, on the border between Brazil and Argentina Portal   Civil and Environmental   Engineering   SDSU