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Portal Tuesday, January 13, 2026    15:27 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 Ancient agricultural hummocks in the Altiplano, near Lake Titicaca, Peru (1995)  510.  One-page summary 520.  Biographical sketch 530.  Recent expertise 540.  Career achievements 550.  All publications 560.  Google Scholar h-index 570.  Research accomplishments 580.  Other accomplishments 590.  Summary Ocean view at Olinda, Pernambuco, Brazil Portal   Civil and Environmental   Engineering   SDSU