Change orders have a strong potential to become difficult, because of its significant increase in cost and contract duration extension. This research identifies and evaluates the causes of change orders in design build ...

Coal has been a major energy source since the Industrial Revolution. Despite its environmental problems, coal consumption is still growing because of the lack of alternatives such as natural gas and petroleum resources. ...

In order to aid in the establishment of “reference” criteria the nutrient status and dynamics of soils, water and stream sediments of a secondary forested watershed is being compared with the dynamics of an “historically” ...

A handful of biochemical processes occur in aquatic environments. One of the problems that are mostly encountered in such environments is caused by excess nutrient input and subsequent algal bloom. A series of studies were ...

This report presents the seismic and landslide monitoring system installation process used in the Guajataca earth dam which is located at the boundary of the municipalities of San Sebastian, Quebradillas and Camuy, Puerto ...

The transit planning in the Metropolitan Area of San Juan in Puerto Rico has a challenging problem because of its low sponsorship. Several reasons for the lack of sponsorship discussed among the community are urban sprawl, ...

Este proyecto es parte de un proyecto de investigación realizada para la oficina del Comisionado de Seguros de Puerto Rico. El proyecto consiste en la generación de mapas de tipos de suelo para el municipio de Arecibo. Las ...

Seismic Tomography has been used by researchers to obtain information about the internal structure of the Earth at different depths. This method is applied to identify and visualize the seismic wave velocity propagation ...

The hydraulic behavior of a new potable water transmission line that flows from Villalba to Coamo was analyzed using computer modeling. The modeling considered steady-state and transient simulations. All the input data in ...

Due to the seismic risk of Puerto Rico, this project was conducted to estimate the fundamental periods of vibration of the soil deposits in the areas of Jardines del Caribe and La Playa, respectively communities of Mayagüez ...