Sandra Owen-Joyce


1978-1993: Investigated the hydrology of the stream-aquifer systems on the Verde and Colorado Rivers to appraise water resources, develop water budgets to estimate groundwater return flow and consumptive use, use remote-sensing technology to estimate evapotranspiration, evaluate the spatial and temporal differences of the variables collected at weather stations for use with satellite-image data in estimating evapotranspiration, map the aerial distribution of evapotranspiration in relation to soil moisture using geographic information system software, compare methodology results, and combine methodologies to develop an accounting system to estimate and distribute consumptive use to water users. 1993-1995: Group Leader in the Arizona District overseeing projects related to lower Colorado River funded by the Bureau of Reclamation related to Decree accounting which included the accounting surface/well inventory project. Negociated the continuation of the well inventory work along the lower Colorado River to provide data to the accounting-surface method, which involves inventoring wells, coding/entry of the data into the NWIS database, developing an image-based database for photographs of the wells, and coordinating work between Reclamation and USGS employees, the States of Arizona, California, Nevada, and Utah, and the Colorado River Indian Tribes. Education MS, South Dakota School of Mines & Technology, 1975, Geology BS, State University of New York at Stony Brook, 1972, Earth & Space Sciences, Geology, Biology