Rivera-Santiago, Félix O.

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High precision GPS monitoring for landslide hazard and land stability evaluation in the Cerca del Cielo urbanization, Ponce, Puerto Rico
(2015) Rivera-Santiago, Félix O.; Joyce, James; College of Arts and Sciences - Sciences; Gilbes-Santaella, Fernando; López-Venegas, Alberto M.; Wang, Guoquan; Department of Geology; Morales-Vélez, Alesandra C.
Geodetic measurements in of the Cerca del Cielo landslide indicate that the displacement is controlled by the amount of precipitation. The decrease in creep rate over the years is considered to be the result of the lower precipitation accumulation rates. Long term changes in displacement coincide with the decrease and increase in the rate of precipitation accumulation. This study establishes a linear relation between displacement rates and precipitation accumulation rates and proposes a model to estimate future surge displacement. Precipitation equal or greater than 100mm per day on a 5-day period on the landslide should follow the estimated 0.98mm per day for the horizontal displacement and 0.49mm per day for the vertical displacement. GPS measurements outside of the landslide showed no evidence of displacements or correlation with precipitation. However we were able to establish the detection limit of the GPS to determine stable and unstable areas.