Comparison of the power spectra of TDS time series from different locations on the Lower Colorado River is useful in showing changes in salinity and for indicating physical factors influencing salinity. Similarities between the power spectra of the Lee Ferry and Grand Canyon tine series indicated that lateral inputs and evaporation are not greatly influencing the salinity cycle. The salinity change within this reach was approximated by a constant concentration change of 66.6 ppm. A similar model form was used for the Hoover Dam to Parker Dam reach. Dissimilarities between power spectra indicated that additional inputs are significant and must be accounted for in any model of such reaches. The model for Lake Mead required compensation for evaporation and for the inputs of the Virgin River and Las Vegas Wash. The modeled salinity increase between Parker Dam and Yuma contained a trend factor to allow for the effect of irrigation return flows and seepage. The crosscovariance function was used to approximate the time lag between data stations. Time series statistics, including coherence, response function spectra, and overall unit response, were used and are of utility in estimating salinity in a river system.

Researchers within the criminal justice field have examined recidivism to discover effective methods to deter criminals from re-offending. Typically, incarceration provided specific deterrence for offenders but recidivism after release proved problematic. Using secondary data analysis, the present study evaluates a cognitive behavioral therapy [CBT] program, Reasoning and Rehabilitation, which the state of Colorado implemented in 1995 among juveniles on intensive probation. The original research team collected the data through pre- and post-questionnaires and interviews with probation officers. The pre- and post-test data are utilized to specifically analyze certain variables including self-control, empathy and problemsolving abilities. The focus of the present study is to determine the level of change in these particular variables as an outcome of completing the CBT program. This analysis also explores the value of CBT programs and examines how the programs alter an offender's level of selfcontrol, empathy and problem-solving abilities thus reducing recidivism after completion.

Call number: LD2668 .T4 1978 K53 / Master of Science

This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.

3 pp. / This fact sheet briefly describes the research protocol of the Colorado River Indian Tribes reservation.

No description available.

Until the 1930s, flows of the Colorado River maintained approximately 781,060 hectares of wetlands in its delta. These wetlands provided important feeding and nesting grounds for resident and migratory birds as well as spawning and protection habitat for many fish and other invertebrate species. However, the Delta's wetlands started to disappear as water was used for agricultural and urban uses in the United States and Mexico. The 1944 United States-Mexico water treaty, which allocates 1.8 million m��/year to Mexico, did not define a minimum flow to maintain the Delta's ecosystems. The resulting degraded Delta lead to the perception in the 1980s that the Delta was a dead ecosystem. This study investigates whether this "dead Delta" perception is valid. Its central hypothesis is that regenerated vegetation in riparian and flood plain zones is associated with surplus river flows during the 1990s. A vegetation analysis, using satellite imagery and field methods, shows that native trees have regenerated during the last 20 years, and now account for 23% of vegetation in a 100 km, non-perennial, stretch of river below the United States-Mexico border. A spatial trend analysis using multi-temporal data on percent vegetation cover indicates that there are 6,320 hectares that show a significant increasing trend (p-value<0.05) in vegetation cover, with the Delta's riparian zone having at least 18% of its area showing this trend. The study estimates that once in four years February to April flow of 300 million m�� (at 80-120 m��/s) is sufficient to germinate and establish new cohorts of native trees, and highlights the need for smaller but more periodic flows in order to maintain wetland areas. It is concluded that there is clear evidence of the resilience of the Delta's ecosystems and that the "dead Delta" perception is no longer valid. There exist critical habitat in the Delta that needs to be protected, while there also exist short and long term opportunities to ecologically enhance and expand current habitat. Hydrological and ecological studies are needed to estimate specific water requirements for these areas in order to efficiently target them for immediate and long term conservation actions. / Graduation date: 2003

This dissertation is a historical biography on the life, suffrage and educational contributions of Mary Carroll Craig Bradford, a wife, mother, suffragist, teacher and educational administrator in the state of Colorado. The purpose of this dissertation was to find out exactly what Bradford?s contributions were to her state. The initial observation was that she was an educator, but after analyzing the data, it was learned that she was so much more. She began as a woman?s rights activist and had a part in the Colorado and national suffrage campaigns. Her activism and popular reputation gained her the respect of the Colorado Democratic Party and she was nominated to run for political office. The research was accomplished by collecting and analyzing many documents. Data was found in the town of Leadville, Colorado, where she first lived and in the archives in Denver, Colorado, where she lived the remainder of her days. Pictures, letters, newspaper clippings, superintendent reports and various other documents were found that gave a perspective on her life. This dissertation described her journey to becoming an elected official and focused on her roles as a suffrage activist and eventually State Superintendent of Public Instruction. The role of state superintendent is one that is not often written about as noted in this dissertation. Several studies have been done on county or city superintendents, but very few have been done on female state superintendents. This dissertation will make a contribution to this field of research.

Thesis (Ph. D.) in Biological Sciences--University of Maine, 2001. / Includes vita. Advisory Committee: Eleanor Groden, Assoc. Prof. of Entomology, Advisor; Francis Drummond, Prof. of Insect Ecology; Seanna Annis, Asst. Prof. of Mycology; David Lambert, Assoc. Prof. of Plant Pathology; John D. Vandenberg, Research Entomology, USDA-ARS. Includes bibliographical references (leaves 158-175).

Terrace deposits along a 40 mile segment of the Colorado River between Austin and Bastrop, Texas, are mapped in detail. The following deposits have been delineated (lowest to highest): Floodplain, Sixth Street Terrace, Montopolis Terrace, Capitol Terrace, Hornsby Terrace, Asylum Terrace, and Delaney Terrace. The Hornsby Terrace deposits and the Montopolis Terrace deposits were previously unrecognized. A program of mechanical analysis was conducted on samples taken from the terrace deposits and the floodplain. Cumulative frequency curves of grain size from five samples collected up to 15 miles apart from the Asylum Terrace gravel, are distinctively grouped--different from all other samples. Cumulative frequency curves from five samples from the Hornsby Terrace gravel also plot in a close grouping distinct from other samples. Over short distances where abrasion is not a dominant factor it seems that grain size distribution may be useful as a means of correlation of terrace remnants. Analysis of the lithologies of these samples indicate that the Hornsby, Asylum and Delaney Terrace gravels are practically without limestone clasts, in a drainage basin that is, presently, composed dominantly of limestone. This suggests that the Commanche Series in the Edwards Plateau region was not extensively exposed but was covered by the Gulf Series at the time of the formation of these terraces. The Manor lag gravel, an upland gravel in the thesis area, is thought to be the remnant of a high terrace deposit of the Colorado River. All terrace gravels except the Capitol and Montopolis Terrace gravels are thought to be the result of lateral planation by a stream at or near grade. The Montopolis and Capitol Terrace gravels are thought to be the result of a lengthy episode of lateral planation by the Colorado River accompanied by slow degradation. / text