The potential of the integrated use of A-DInSAR data and 3D groundwater flow and geomechanical models to capture and assess aquifer dynamics is performed. The approach has been applied to investigate the response during and after pumping of a portion of the Madrid aquifer. The short time delay (about one month) between the groundwater pumping and the system response (land displacements) are likely due to a minor role played by the clayey layers.

This paper summarizes a workshop held in Parker, AZ, USA, to discuss planned scientific drilling in the Miocene(?) or early Pliocene Bouse Formation, a controversial deposit (of lacustrine, marine, or some hybrid origin) found in the lower Colorado River valley. The drilling project is intended to address this controversy as well as shed light on Pliocene climates of southwestern North America during an important period of past climate change.