Thesis (M.S.)--University of Wyoming, 2007. / Title from PDF title page (viewed on June 17, 2008). Includes bibliographical references.

Thesis (M.S.)--West Virginia University, 2005. / Title from document title page. Document formatted into pages; contains x, 150 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 72-73).

Thesis (M. Eng.)--Colorado School of Mines, 1993. / Thesis advisor: Eileen Poeter, Dept. of Geology and Geological Engineering. Includes bibliographical references (leaves 93-97). Includes bibliographical references (p. 93-97). Also available in print version.

The foundation of the Jaburu I dam it is a classical performance case of foundations in sandstone sedimentary rock. The continuous monitoring of the dam has been the detected the non-regular seepages and adopted in establishing the planning and execution of the remediation campaigns in way to keep the foundation and damâs structures in safety conditions over three decades of operation, in despite of the ineffectiveness of conventional treatment foundation in sedimentary formation that had been used. Seepage anomalies indentified since the first filling of the reservoir in some regions of embankment and its foundation, detaching a significant flow in the left abutment which reached the maxima discharge of 47 l / s in 1988. Since then new points of resurgences have been identified and monitored by flow gages located in the downstream region. This monograph presents the events recorded in the flow gages and the remedial campaigns adopted to reduce the seepage in the foundation, embankment and abutments of the dam, as well as others specific interventions designed to recover the internal drain, stabilize the dam and to fill the cavities formed by the decomposition of the sandstone rock in the foundation. After the publication of the Law 12.334/2010, which established the National Policy of Dam Safety, it was established a complete list of responsibilities related to the safety of dams in Brazil, some of them already taken as routine by the Government of Cearà since 2002. This monograph recommends to the rock foundations of the dam, treatments with new sealing technologies that would mitigate the present anomalies. / A fundaÃÃo da Barragem Jaburu I apresenta comportamento clÃssico em se tratando de fundaÃÃes em rocha sedimentar tipo arenÃtico. O monitoramento contÃnuo deste empreendimento tem sido o principal indicador no estabelecimento do planejamento e execuÃÃo das aÃÃes de tratamento das fundaÃÃes e recuperaÃÃo das estruturas comprometidas no decorrer de trÃs dÃcadas, onde se pode verificar a pouca eficÃcia do tratamento convencional de fundaÃÃo em ambiente sedimentar. Desde o primeiro enchimento do reservatÃrio foram identificadas anomalias no maciÃo de terra e na fundaÃÃo, em forma de percolaÃÃo, juntando-se a estas uma significativa vazÃo na ombreira esquerda que alcanÃou um pico de 47 l/s, em 1988. Desde esta ocasiÃo, novos pontos de surgÃncias foram identificados e monitorados por meio de medidores de vazÃo na regiÃo de jusante. Apresentase, assim, os acontecimentos registrados na barragem e os programas de tratamentos adotados para reduzir as percolaÃÃes pela fundaÃÃo, do corpo da barragem e ombreiras, assim como outras intervenÃÃes realizadas com o propÃsito de drenar o fluxo, estabilizar a barragem e obturar as cavidades provenientes da decomposiÃÃo da rocha arenÃtica. Com o advento da Lei 12.334/2010, que instituiu a PolÃtica Nacional de SeguranÃa de Barragens, foi estabelecida uma cadeia completa de responsabilidades relacionadas à seguranÃa das barragens construÃdas no Brasil, sendo que algumas das aÃÃes propostas jà sÃo adotadas pelo Governo do CearÃ, desde 2002. Esta dissertaÃÃo conclui recomendando aÃÃes de reabilitaÃÃo da rocha de fundaÃÃo da barragem, com novas tecnologias de impermeabilizaÃÃo, de forma a mitigar as anomalias.

Estimation of seepage was done in 39 selected reaches of 11 irrigation canals in the Logan and Blacksmith Fork Irrigation Systems of Cache Valley, Utah. The measurements were performed from June to October, 2008, which includes part of the irrigation season for these canals. The inflow-outflow method was used to measure seepage, in which area and velocities were measured under steady flow conditions. Velocity measurements were done with an acoustic flow meter and the mean velocity was determined using the reduced-point method (velocity measurements at 0.2, 0.6 and or 0.8 of the depth from the water surface). As a result, reaches with the highest seepage losses were identified. Gaining streams, losing streams, and gaining-losing streams were also identified. Spatial variation was observed along each canal in which a descending trend of the mean seepage loss was found in the downstream direction. Additionally, spatial variation was found between canals, the reaches located in the east part of Logan city presented higher seepage losses than reaches on the west side of the city. Temporal variations were identified by a monthly comparison of seepage losses within reaches which indicated higher seepage losses during late July and August of 2008. Additionally, this report presents comments about the performance of the FlowTracker® ADV® in the present project.

No description available.

In recent years, there have been efforts to develop a design procedure for swale systems which could be applied to permeable soils. This design should consider space limitations or any other site restriction. Five existing swale sites in the Central Florida area were instrumented to determine flow rates and permeability’s. Twenty-two experiments were performed. It is concluded that the use of a double-ring infiltrometer to determine the infiltration rate is possible for existing swale sites. Another conclusion is that published values of permeability are very variable and accurate, nor specific enough to predict actual infiltration rates. However, very conservative values can be used in design. A swale design procedure, including an equation for the length of triangular and trapezoidal swales, was developed.

A tilting bed flume study was made to examine the relationships between velocity, suspended sediment and infiltration rate in alluvial channels for velocities from 2 to 5 feet per second and suspended sediment up to 0.6 percent. Preliminary experiments using samples from Rhllito Creek near Tucson, Arizona to define limits for the flume study included mechanical analyses of bed sediments, permeability and infiltration tests, and analyses of suspended sediment in flood waters. Flume experiments using bed materials from Rillito Creek were made with constant velocity and variable suspended sediment content, then with constant suspended sediment and variable velocity. Considerable variability was found in the mechanical analyses, permeability and infiltration tests, and suspended sediment content for samples from different locations. The flume studies indicated a direct relationship between velocity and infiltration rate and an inverse relationship between the suspended sediment content and infiltration rate in the ranges tested. Very poor correlation was found between the preliminary permeability and infiltration tests and the flume infiltration rates, but good correlation was obtained for the flume results with the flow losses and natural recharge occurring in the river channels in the Tucson area.

An experimental investigation of the behavior of soil water movement under unsaturated transient conditions is reported for the case of vertical infiltration into a sandy loam and silt loam soil material. Water was allowed to enter at a small constant suction into air-dry columns of soil and its subsequent distribution followed with a gamma radiation attenuation device. An analytic expression of water content as a function of depth and time was obtained by multiple regression analysis from which it was possible to determine the instantaneous flux and the water concentration gradient at given water contents. During the early stages of infiltration the relationship between the flux and gradient was linear as prescribed by the Darcy equation. At later times when the gradient became less steep linear proportionality broke down. Non-linearity at low water gradient was evidenced for both soils throughout a wide range of water contents. The magnitude and direction of the departure from linearity was similar for both soils indicating the deviations were possibly not due to specific soil properties, but rather to an inherent characteristic of the flow system itself. An empirical flow equation modeled after the Darcy equation fits the data very well. The behavior of the equation parameters was strongly reminiscent of those of the Darcy equation. Where flux was proportional to the gradient, the equation reduced to the Darcy equation. If flux were not proportional to the water gradient then the term representing the diffusivity of diffusion analysis became a function of both the water gradient and water content.

Thesis (M.S.)--West Virginia University, 2002. / Title from document title page. Document formatted into pages; contains xii, 210 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 100-101).