Electrical analog model study of the alluvial aquifer in the Yabucoa Valley, Puerto Rico; Phase 2, the planning, construction, and use of the model

Geochemical properties and saline-water intrusion in the Valle de Yabucoa alluvial aquifer, southeastern Puerto Rico

“…The value for evapotranspiration in the Valle de Yabucoa may be similar to this amount, which is less than the reported annual pan evaporation. The 40 percent value is in agreement with previous studies of the hydrology of the area (Anders, 1971;Robison and Anders, 1973), which assumed that evapotranspiration was about 50 percent of precipitation.…”

“…The hydrogeology of the Valle de Yabucoa alluvial aquifer has been previously described by Anders (1971) and Robison and Anders (1973). These studies were conducted when the main economic activity in the valley was the growing and processing of sugar cane and prior to the construction of the major industries now operating in the valley.…”

“…Anders (1971) gives a detailed description of factors that influence the hydrogeology of the area. Robison and Anders (1973) report on the results of an analog model that was constructed to simulate the effects of long-term pumping.…”

“…Anders (1971) reports seven values of specific capacity and transmissivity from aquifer tests at different wells completed in the alluvial aquifer. Transmissivity at these sites ranged from 20 to 340 Robison and Anders (1973) constructed an electrical analog model of the aquifer to simulate the effects of long-term pumping. Based on their model, at o a ground-water pumping rate of about 6 m /s saline water would not reach theoretical production wells along the Zanja Barra for about 200 years.…”

Atlas of ground-water resources in Puerto Rico and the U.S. Virgin Islands

“…Dashed where approximated. Contour interval is variable --------DRAINAGE DIVIDE THAT LIMITSBOUNDARY , 1989;Robison and Anders, 1973; Adolphson and others, 1977…”