These results agree with previously published PRB field data and simultaneously conducted geochemical monitoring and mass balance calculation, indicating that both the geochemical and hydraulic environment of the PRB play an important role in determining barrier lifespan.
The system included a pressure transducer built in a hydraulic environment, a heavily shielded EMG recording element, and a visual feedback structure for online monitoring of force and/or EMG signal, by the subject positioned in the scanner during an fMRI experiment.
The purpose of the study was to evaluate the first three methods for their ability to provide reasonable estimates of relatively low groundwater flow velocities in such low-hydraulic-gradient environments.
The typical EGS system does not exist because - as shown in the tables and in the figures - there are several possible (and significantly different) geological, petrophysical, thermal, hydraulic and geomechanical environments where high temperature can be tapped underground.
The role of trees in improving watershed functions and the importance of hydraulic lift in dryland environments are also considered.
As American companies begin scouting for shale-gas overseas, the regulatory environment for hydraulic fracturing at home seems poised to tighten, especially in the wake of the BP oil spill in the Gulf of Mexico, which has increased public skepticism about the oil and gas industry's safety assurances.
Spatial impact assessments are critical for improving understanding of the impacts of hydraulic fracking on the environment and society.
Resonant frequency (RF) and mechanical properties including stiffness, first cracking strength, ultimate tensile strength and tensile strain capacity were experimentally determined for ECC specimens that were preloaded to 1% strain and exposed to sulfate and sulfate-chloride solutions to simulate the service environment of hydraulic structures.
The summit recommended actions and policies to safeguard the health of North Carolina's citizens and environment if hydraulic fracturing occurs in the state (Research Triangle Environmental Health Collaborative 2013).
These results demonstrate that ECC material remains durable under sulfate-chloride environment, which is beneficial for improving the long-term performance of hydraulic structures in such aggressive environments.
