Applied research project (D. Min.)--School of Theology and Missions, Oral Roberts University, 2008. / Includes abstract and vita. Includes bibliographical references (leaves 167-171).

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Cognition and social values prevail in urban evolution. Analysis of these values reconstruct an era that has largely vanished; the context is historic downtown Tucson, and the significance is the Mexican enclave that had La Placita as its social focus. The historical evolution and the urban character of La Placita and its surrounding barrio is documented with emphasis on the social meaning of its change. A newly developed cognitive theory of vantages and coordinates provides a model to depict the viewpoints that defined urban development in Tucson. The analysis of personal viewpoint provides a statement of the manner that social values and cognition shaped architecture and urban change throughout the years of growth in the center of Tucson.

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In the 1690s, Father Kino described Tucson as a highly suitable place to establish a mission community. Once founded, Mission San Agustin del Tucson became a visit a of the neighboring Mission San Xavier del Bac, which served as the cabecera. After Mexico gained its independence from Spain in 1821, the nearby Pima village of El Pueblito was abandoned, and the mission fell into ruin as the church property was homesteaded, given away, or sold. Physical evidence of the mission, including a convento and gardens, was further compromised after a brick manufacturing plant and, later, a landfill took their toll on the archaeological record. By the middle of the twentieth century, the last evidence of the mission era was destroyed. Mission San Agustin can be interpreted as an example of colonial failure that does not conform to traditional culture contact models of a unilinear sequence from diffusion to acculturation and, ultimately, to assimilation. San Agustin was for a short period a thriving, productive, complex mission community that overshadowed its neighboring cabecera, San Xavier del Bac. Using a historical archaeological approach, this paper describes the cultural context in which Tucson's mission was constructed, abandoned, fell into ruin, and disappeared. Major historical events and processes are suggested as possible causes for this failure.

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From the Proceedings of the 1975 Meetings of the Arizona Section - American Water Resources Assn. and the Hydrology Section - Arizona Academy of Science - April 11-12, 1975, Tempe, Arizona / Since 1955 secondary treated effluent from the city of Tucson treatment plant has been released into the Santa Cruz River, the principal drainage tributary of the Tucson basin. Because the river is ephemeral, it has functioned essentially as an artificial recharge facility for sewage effluent. In past years the total volume of effluent artificially recharged amounted to about 31,000 ac-ft per year. Such recharge has affected not only the groundwater levels in the vicinity of the river, but also water quality. Recharge of nitrate is of particular concern.