Portal 18:11 hr  PDT  [UT - 7]    Wednesday July 23, 2008   About Numbered New Subdomains Search/Index Contact Us Contact Us 100.  General 200.  Research 300.  Publishing 400.  Learning 500.  Biodata 600.  Restricted 700.  Reports 800.  Lectures 900.  Personal To refresh picture Confluence of the Rio Humea (left) with the Rio Guatiquia (right), Meta department, Colombia (2002)  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 studies 290.  Current research Iguaçu Falls, on the Iguaçu river, on the border between Brazil and Argentina Portal   Civil and Environmental   Engineering   SDSU