Gotowe bibliografie tematyczne / EARTHEN DAM

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Gotowa bibliografia na temat „EARTHEN DAM”

Autor: Grafiati

Data publikacji: 11 września 2023

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Artykuły w czasopismach na temat "EARTHEN DAM"

Vasoya, Kamal, i Nayankumar Soni. "Seepage Analysis of Core Section of Jhuj Dam". International Journal for Research in Applied Science and Engineering Technology 10, nr 5 (31.05.2022): 713–17. http://dx.doi.org/10.22214/ijraset.2022.42312.

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Abstract: Zoned type Earthen dams are the type of Rolled fill Earthen dam because the soil is compacted by mechanical rollers in thin layers of 20-30 cm having central impervious core surrounded by shell as pervious material. These dams made since early days of civilization and constitute to be the most common type, because it is generally built of locally available soils proved to be most economical. The soil used in earthen dam are suspectable to seepage through the body of dam due to their permeability. Due to seepage soil gets reduces its strength and failures of dam may occurs. Past studies on earthen dam failures concluded that about 30% of dam failed due to seepage. An impervious central core is used in zoned type earthen dam to reduce the seepage quantity through the body of the dam and protects against the seepage failure of dam like piping and sloughing. Earthen dams are vulnerable to failures due to seepage that take place in the core since all soils are pervious to some extent. One of the best ways to control seepage problem in earthen dam is by using proper impervious soil for core section which provides the water tightness to flow through it. Thus, this paper analyses the usage of locally available soils with different combinations with central impervious vertical core and to study the seepage discharge by using Darcy law. The results obtained from the study is compared with actual seepage data obtained with existing soil in central core. Keywords: Impervious core, Permeability and Seepage, Smear effects, Phreatic line, Flow net

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Nandi, N., Roy Chowdhury i S. C. Dutta. "Effect of Seepage on Change in Stress Distribution Scenario in Static and Seismic Behaviour of Earthen Dams". International Journal of Applied Mechanics and Engineering 23, nr 1 (1.02.2018): 121–36. http://dx.doi.org/10.1515/ijame-2018-0008.

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AbstractThe present study makes an effort to understand the damage of earthen dams under static and seismic loading condition. To make the investigation more realistic, behaviour of earthen dams considering the occurrence of a phreatic line indicating the submerged zone due to seepage within the dam body is considered. In case of earthen dams, homogeneous or nonhomogeneous, the consideration of the occurrence of a phreatic line or seepage line through the dam body is an important part of the earthen dam design methodology. The impervious material properties in the submerged zone below the phreatic line due to seepage may differ a lot in magnitudes as compared to the value of the same materials lying above this line. Hence, to have the exact stress distribution scenarios within the earthen dam, the different material properties above and below the phreatic line are considered in this present study. The study is first carried out by two-dimensional as well as three-dimensional finite element analysis under static loading condition. The work is further extended to observe the effect of seepage due to the consideration of the phreatic line on dynamic characteristics of earthen dams. Free vibration analysis and seismic analysis based on the Complete Quadratic Combination (CQC) method by considering twodimensional and three-dimensional modeling are carried out to present the frequencies, mode shapes and the stress distribution pattern of the earthen dam.

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Rasskazov, L. N., i M. V. Smirnova. "Selecting the Type of Earthen Dam". Power Technology and Engineering 48, nr 2 (lipiec 2014): 85–88. http://dx.doi.org/10.1007/s10749-014-0489-7.

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Hood, K., R. A. Perez, H. E. Cieplinski, T. V. Hromadka, G. E. Moglen i H. D. McInvale. "Development of an Earthen Dam Break Database". JAWRA Journal of the American Water Resources Association 55, nr 1 (29.11.2018): 89–101. http://dx.doi.org/10.1111/1752-1688.12703.

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Салямова, К., Klara Salyamova, Х. Турдикулов, H. Turdikulov Husanboy Hudoynazarovich, И. Мифтахова i I. Miftahova. "CALCULATION OF HIGH EARTHEN DAM TAKING INTO ACCOUNT THE STRESSED CONDITION AND PORE PRESSURE (CONSIDERING THE DATA OF NATURAL OBSERVATIONS)". Bulletin of Belgorod State Technological University named after. V. G. Shukhov 4, nr 7 (21.07.2019): 24–32. http://dx.doi.org/10.34031/article_5d35d0b7694ea7.79490804.

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Large-scale design, construction and operation of groundwater structures (dams) in the seismic zone of the Republic of Uzbekistan challenges researchers with the task of continually improving methods for calculating the basic loads (gravitational forces, hydrostatics), as provided by the design standards. Accidents or damage to water supporting structures can lead to catastrophic consequences. Static calculation of plane models of earthen dams on a rigid and pliable base is made on the basis of the developed set of applied programs. It takes into account the structural heterogeneity under its own weight and hydrostatic pressure on the upper slope. Finite element discretization of models is used in the calculation. The accuracy and convergence of the results obtained is shown in a test example. Numerical calculations are performed on the example of Charvak earthen dam. On the basis of developed programs, calculations are carried out and the effect of the base compliance on the stress-strain condition of the earthen dam under its own weight is investigated. Studies of the stress-strain condition of a soil structure revealed a violation of strength in the central part of a heterogeneous soil dam near the core and adjacent areas, on a part of the surface and at the foot of the side slopes, regardless of the base flexibility. It is shown that pore pressure dispersion in the clay core of the stone-earthen dam of the Charvak Hydroelectric Station is very slow. This may contribute to the formation of an unfavorable stress-strain condition of the dam, which changes over time.

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Zhao, Mingjie, Pan Liu, Li Jiang i Kui Wang. "The Influence of Internal Erosion in Earthen Dams on the Potential Difference Response to Applied Voltage". Water 13, nr 23 (1.12.2021): 3387. http://dx.doi.org/10.3390/w13233387.

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Internal erosion is widely perceived as contributing to the failure of earthen dams. To reduce the failure risk, timely monitoring of internal erosion is an effective method in observing their internal structure evolution. A set of earthen dam model experiments were conducted. Under an applied voltage, the response potential differences (PD) at the slope of the dam models were collected before and after the impoundment of the upstream reservoir. The discrepancy among the four dam models, the influence of soil moisture content on PD, and the impact of internal erosion on PD were studied. The results show that it is acceptable to employ different dam models to simulate the development of internal erosion, although the discrepancy among the models is inevitable. The moisture content of the soil significantly affects the PD response to applied voltage. The PD increases with an increase in soil moisture content until the soil is saturated. The change in PD is correlated with the development of internal erosion. With the progression of internal erosion, the starting position for the steep increase in PD distribution continues to move toward the dam toe. In addition, the electrode stability is noted to have an effect on measured PD, which requires further studies to be clarified. This study sets the stage for the PD-based monitoring method in observing the evolution of internal erosion in earthen dams.

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Harabinova, Slavka, i Eva Panulinova. "Impact of Seismicity on Stability of Earthen Dam Slopes". Advanced Materials Research 969 (czerwiec 2014): 208–11. http://dx.doi.org/10.4028/www.scientific.net/amr.969.208.

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The impact of seismicity on stability of earthen dam slopes is discussed in the article. The analysis of the slope stability of the Domaša Dam was carried out. Petterson, Bishop and Sarma methods were employed for the calculations while taking into account the seismic actions according to EN1998-1.

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Salyamova, K. D. "Dynamic calculation of a plane “Earth Dam-Base” system under seismic impact". E3S Web of Conferences 401 (2023): 05086. http://dx.doi.org/10.1051/e3sconf/202340105086.

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Design, construction, as well as reliable and safe operation of earthen hydraulic structures (earth dams) in the Republic of Uzbekistan, located in a seismically hazardous zone, require constant improvement of load calculation methods, as required by building codes, including constant loads (static - gravity, hydrostatic) and temporary dynamic loads (seismic). The current normative method does not take into account the non-one-dimensional behavior and piecewise heterogeneity of the soil characteristics of the structure and foundation. It does not allow determining the stress-strain state (SSS) of an earthen dam, which is especially important for reliable and safe operation in seismic areas. A mathematical formulation of the dynamic problem of an earthen dam in a flat elastic formulation is given. The problem is solved numerically by the finite element method. The eigenfrequencies and modes of vibrations of the flat system “structure-foundation” are determined taking into account the piecewise inhomogeneous characteristics of the foundation soil. Based on the results of these parameters, an appropriate behavior analysis is performed. The SSS of the “dam-foundation” system was studied at the calculated natural frequencies. The result of the calculation was the isocline of equal displacements, normal and shear stresses in the “dam-foundation” system.

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Ikard, S. J., J. Rittgers, A. Revil i M. A. Mooney. "Geophysical Investigation of Seepage Beneath an Earthen Dam". Groundwater 53, nr 2 (17.03.2014): 238–50. http://dx.doi.org/10.1111/gwat.12185.

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Patil, Anuja Kiran, i D. S. Patil. "Earthen Dam Failure and Recommendation- A Case Study". IOSR Journal of Mechanical and Civil Engineering 13, nr 04 (kwiecień 2016): 131–39. http://dx.doi.org/10.9790/1684-130407131139.

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Rozprawy doktorskie na temat "EARTHEN DAM"

Shaheed, Salma 1966. "Analysis of unsteady flow through an earthen dam using the boundary element method". Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278155.

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Unsteady flow through an earthen dam has been investigated using the Boundary Element Method in which the upstream reservoir level may vary in a cyclic manner. The seepage surface at the upstream face is included in the computer model when the water level drops in the upstream reservoir. The use of this model has been illustrated by studying the variation of the phreatic surface in a beach along the Colorado river in the Grand Canyon. The potentials at various internal points are also calculated and compared with those measured in the field. Very good agreement is obtained between the results using the Boundary Element Method and field data.

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Charatpangoon, Bhuddarak. "SEISMIC SAFETY EVALUATION OF EARTH DAM AND POSSIBLE REHABILITATION METHODS". 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/192169.

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Haeri, Seyed Mohsen. "Response of earth and rockfill dams to strong earthquakes including dam-foundation interaction effects". Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47094.

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Al-Riffai, Mahmoud. "Experimental Study of Breach Mechanics in Overtopped Noncohesive Earthen Embankments". Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31505.

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A comprehensive experimental program dealing with three-dimensional overtopping and breach development as well as two-dimensional overtopping physical tests of noncohesive earth embankments has been conducted on scale models in the Hydraulic Laboratory at the Department of Civil Engineering at the University of Ottawa. The experimental program which consisted of three phases focused on geotechnical and hydraulic aspects of the embankment breach mechanism. The first two phases focused on two test series for the three-dimensional breach overtopping tests: drainage and compaction. The test series were designed to determine the embankment breach characteristics using test parameters which have not been adequately identified or controlled in past noncohesive physical models: initial soil-water state and optimum dry unit weight. Both parameters were controlled in laboratory tests by means of compaction effort and seepage through the embankment body, respectively. The dynamic compaction technique employed in the preliminary experimental phase was refined to represent a more realistic method. A novel method was thus designed to simulate the construction of a real-size prototype embankment, where a vibratory and static load was used to apply and control, respectively, the compaction effort. The hydraulic aspects of the embankment breach mechanism were also investigated. For the first time, scale series tests have been used to assess the Froude criterion using tilted and quasi-exact geometric scales under very low inflow within the scope of three-dimensional breach overtopping. Data measurements included a time-history of water surface levels and video footage captured from three locations: upstream, downstream and above the embankment models. The analysis for the spatial breach overtopping tests involved measurement of the breach outflow hydrograph and breach channel evolution at the upstream slope, using hydrologic routing and a developed photogrammetric technique using the video footage, respectively. An expression which estimates the breach outflow based on this apparent upstream control section was therefore derived. The relationship between the measured and estimated breach outflow was expressed in terms of breach discharge efficiency. The third phase of the experimental program was comprised of two-dimensional overtopping tests to investigate the erodibility of a steep slope in overtopped noncohesive embankment models. A novel experimental two-dimensional configuration used to measure the pore-water-pressures within the embankment model body was developed using micro and standard tensiometer-transducer-probe assemblies, designed, assembled and tested at the Geotechnical Engineering Laboratory. A transient flownet analysis was developed using ArcGIS and the time-history of the pore-water-pressure measurements. All flow parameters were computed using the free water surface and bed profiles captured using a photogrammetric technique and the developed hydrologic routing method. Using the one-dimensional Saint-Venant equations, an analytical expression for the bed shear stress was derived to take into account the effects of unsteady flow, boundary seepage and steep slopes. Using the measured erosion rates and the sediment continuity principle, the bed mobility relationship expressed by the Shields and transport parameters was revisited to account for the effects of unsteady and supercritical flow on a downstream steep slope in the presence of boundary seepage. This novel transient flownet approach will lead to the development of new sediment mobility relationships for breach flows, instead of the classical sediment transport-capacity formulations which are based on steady, subcritical and normal flow conditions.

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Smiderle, Camila de Souza Dahm. "Segurança de barragens : análise da instrumentação da barragem de Itaúba". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/115274.

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Neste trabalho foi feita a análise das leituras da instrumentação da barragem de terra e enrocamento de Itaúba, localizada no centro do estado do Rio Grande do Sul, coletada ao longo de 35 anos. A auscultação por instrumentação atual inclui medidores de vazão, piezômetros, marcos de deslocamento superficial e medidor de recalque tipo KM, compondo um banco de dados de 10.000 dados de leitura. Foi observado que as vazões medidas através dos drenos de fundação da barragem reduziram pela metade desde o primeiro ano de operação da barragem até o final de 2013, embora os níveis piezométricos do sistema de drenagem à jusante não tenham sofrido alteração. As vazões dos filtros inclinado e vertical são afetadas pelas chuvas, mesmo assim foi possível concluir que as vazões reduziram 1/3 em comparação com a vazão logo após o segundo enchimento do reservatório. A vazão pela barragem e fundação era de 1.800 l/min no primeiro ano de operação decrescendo para 930 l/min (dez / 2013). Observou-se que até o fim do período construtivo já haviam ocorrido 101,75cm de recalque (92% de todo o recalque medido). Os recalques do núcleo estabilizaram entre o 5° e 10° ano de operação da barragem, isto é, desde 1988 a barragem não apresenta recalques significativos. O recalque total de Itaúba foi de 109,6cm que representa 1,2% da altura da seção onde o medidor de recalque está instalado. A análise permite concluir que a Barragem de Itaúba esta estabilizada quanto aos deslocamentos verticais e horizontais. Apesar de tratarse de dados de leituras coletados desde 1976, as informações apresentadas aqui são de relevante interesse e ainda não haviam sido publicadas.
In this work, the analysis of Itauba dam instrumentation is carried out. This earth and rock fill dam is located in the center of Rio Grande do Sul state and the readings cover its 35 years of operation. The currentinstrumentation includes flow meters, piezometers, surface displacement and settlements gauge type KM, composing a 10,000 reading database. It was observed that the flow rates measured through the dam foundation drains reduced to half since the first year of dam operation, although the piezometric levels of the downstream drainage system showed no significant change. Flow rates of inclined and vertical filters are affected by the rains, even so it was still possible to conclude that the flows reduced circa of 1/3 compared to the flow after the second filling of the reservoir. The flow through the dam and foundation which was 1,800 l / min in the first year of operation decreased to 930 l / min (Dec / 2013). It was observed that by the end of the construction period had occurred 101,75cm of settlement (92% of all the measured settlement). The settlement core stabilized between the 5 th and 10th year of dam operation, that is, since 1988 the dam does not present significant settlements. The total discharge of Itaúba was 109,6cm representing 1.2% of the section height where repression meter is installed. The analysis shows that the Itaúba dam has stabilized its vertical and horizontal displacements.

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Soliday, Stanley Jr. "Limits of limit equilibrium and finite element techniques applied to cracked debris dams on collapsing foundations". PDXScholar, 1991. https://pdxscholar.library.pdx.edu/open_access_etds/4428.

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Limits of slope stability, limit equilibrium methods, and of the finite element code FEADAM are reached in the application of these methods to the problem of cracked dams constructed on collapsing soils.

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Ikard, Scott. "Geoelectric monitoring of seepage in porous media with engineering applications to earthen dams". Thesis, Colorado School of Mines, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3602502.

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A monitoring methodology is developed for investigating seepage and internal erosion in earthen dams with time-lapse measurements of self-potential anomalies associated with conservative salt and non-conservative heat tracer migration in the subsurface. The method allows for 1) detecting seepage zones in earthen dams and determining the preferential flow paths through seepage zones in a non-invasive manner from the ground surface, 2) monitoring the transient evolution of seepage path geometry, flow velocity, and permeability in real-time if high frequency measurements can be made, and 3) long-term non-invasive monitoring with wired or wireless sensors The method is first theoretically developed and tested in a laboratory using a conservative tracer, and then demonstrated at a 12 m high, 100 m long leaking earthen dam with complex, unknown seepage paths. The method is shown to be capable of rapidly detecting seepage zones discovered during a reconnaissance survey, and delineates the predominant seepage directions through the dam from the time-lapse self-potential anomalies. The time-lapse monitoring approach ensures improved spatial resolution, increased measurement frequencies, and improved data analysis capabilities relative to traditional approaches to seepage detection, and a cost-reduction for the application of this methodology is anticipated to follow advancements in wireless sensing and monitoring technologies. This method is designed to be a more cost-effective means of interrogating earthen dams and levees to answer questions such as: Is the dam safe? What are the geometries of the seepage zones inside of the dam, and over what spatial scale does anomalous seepage occur? What are preferential paths through the seepage zones? Is internal erosion actively occurring? At what rates are the geometries, permeabilities and flow rates of preferential seepage paths evolving?

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Lau, Tak Chi. "Fully-coupled earthquake response analysis of earth dam including anisotropic effect /". View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202008%20LAU.

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Guo, Xiangfeng. "Probabilistic stability analysis of an earth dam using field data". Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALI017.

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Compte tenu de la nature des sols, des incertitudes sur leurs propriétés sont largement rencontrées en géotechnique, en particulier dans le domaine des barrages en terre. Actuellement, il est de plus en plus nécessaire de tenir compte de ces incertitudes pour l'évaluation de la sécurité des grands barrages, notamment dans le cadre des études d’analyse de risques. Cependant, les analyses probabilistes sont complexes et difficiles à mettre en œuvre en raison du nombre limité de mesures, des temps de calcul importants et des limites des méthodes fiabilistes implémentées dans les outils de simulation commerciaux. De plus, la plupart des études précédentes sont basées sur des cas académiques et des données hypothétiques.Ce travail tente de résoudre les problèmes mentionnés ci-dessus en fournissant une étude d'analyse probabiliste pour la stabilité d'un barrage réel en terre en considérant les données in-situ disponibles. Cette étude inclut les éléments principaux suivants: (1) définition de la variabilité des sols en utilisant les mesures disponibles; (2) développement des modèles déterministes; (3-4) analyses probabilistes bu barrage en utilisant des approches en variables aléatoires et en champs aléatoires; (5) analyse 3D de la fiabilité du barrage considéré. Des méthodes fiabilistes avancées (par exemple le métamodèle adaptatif) sont introduites. Cela permet d'estimer précisément la probabilité de rupture du barrage et les valeurs statistiques des facteurs de sécurité avec un temps de calcul significativement réduit. En outre, certaines questions, qui restaient floues dans le domaine de l'analyse probabiliste des barrages, sont discutées (e.g. l’analyse de sensibilité globale des paramètres hydrauliques et géo-mécaniques des sols ; l’étude des performances de cinq méthodes de fiabilité; la simulation/comparaison de trois types de champs aléatoires : générique, conditionnel et non-stationnaire). Le travail présenté, basé sur des données réelles, pourrait être un bon complément aux études probabilistes existantes des ouvrages géotechniques. Les lecteurs pourront également trouver des informations utiles à partir des résultats obtenus afin de mieux résoudre les problèmes pratiques de géo-ingénierie dans un cadre probabiliste
Uncertainties of soil properties are widely encountered in the field of geotechnical engineering especially for earth dams which are constructed with earthen materials. In recent years, there is an increasing need, motivated by the deficiencies of the traditional deterministic approach or guided by the national regulations such as in France, of accounting for these uncertainties for a safe assessment of large dams particularly in the framework of risk analysis studies. However, probabilistic analyses are still complex and not so easy to implement in practice due to the limited number of in-situ measurements, expensive computation efforts and lack of implementation of reliability methods in commercial simulation tools. Moreover, most of the previous studies are based on academic cases and hypothetic data.This work attempts to deal with the aforementioned issues by providing a probabilistic analysis study for the stability of a real earth dam using available field data. This study includes the following main elements: (1) definition of the soil variability by using the available measurements; (2) development of the deterministic models; (3-4) dam probabilistic analyses using the random-variables and random-fields approaches; (5) three-dimensional reliability analysis of the considered dam. Advanced reliability methods, such as the adaptive surrogate modelling, are introduced for the studied earth dam problem. This allows accurately estimating the dam failure probability and the safety factor statistics with a significantly reduced calculation time. In addition, some issues, that remain unknown or unclear in the field of the dam probabilistic analysis, are discussed (e.g. global sensitivity analysis of the soil hydraulic and shear strength parameters; performance survey of five reliability methods; simulation/comparison of three different kinds of random fields: generic (unconditional-stationary), conditional and nonstationary). The presented work, based on real measurements, could be a good supplement to the existing probabilistic studies of geo-structures. Readers will find useful information from the obtained results in order to better solve the practical geotechnical problems in a probabilistic framework

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Ersayın, Deniz Tayfur Gökmen. "Studying Seepage In A Body Of Earth-Fill Dam By (Artifical Neural Networks) Anns/". [s.l.]: [s.n.], 2006. http://library.iyte.edu.tr/tezler/master/insaatmuh/T000350.pdf.

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Książki na temat "EARTHEN DAM"

Division, Montana Water Resources. Small earthen dam construction: A guidebook for planning and construction of small earthen embankments. Helena, MT: Montana Dept. of Natural Resources and Conservation, Dam Safety Program, 2004.

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United States. Federal Emergency Management Agency., red. Technical manual for dam owners: Impacts of animals on earthen dams. [Washington, DC]: FEMA, 2005.

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Parulekar, Y. M. Seismic analysis of tailings earthen dam at Jaduguda: A case study. Mumbai: Bhabha Atomic Research Centre, 2007.

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Johnson, Douglas L. Periodic dam safety inspection report: Sinlahekin Dams. Olympia, Wash: Shorelands & Water Resources Program, Dam Safety Section, Washington State Dept. of Ecology, 1996.

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Johnson, Douglas L. Periodic dam safety inspection report: Leader Lake Dams, Okanogan County, Washington. Olympia, Wash: Washington State Dept. of Ecology, 2001.

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Johnson, Douglas L. Periodic dam safety inspection report: Serenity Lake Dam. Olympia, Wash: Water Resources Program, Dam Safety Office, Washington State Dept. of Ecology, 2001.

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Johnson, Douglas L. Periodic dam safety inspection report: Rose Lake Dam. Olympia, Wash: Washington State Dept. of Ecology, 1994.

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Johnson, Douglas L. Periodic dam safety inspection report: Lake Limerick Project. [Olympia, Wash.]: Washington State Dept. of Ecology, 1998.

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Johnson, Douglas L. Periodic dam safety inspection report: Tsugawa Brothers Reservoir Dam. Olympia, Wash: Shorelands & Water Resources Program, Dam Safety Section, Washington State Dept. of Ecology, 1995.

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Johnson, Douglas L. Periodic dam safety inspection report: Indian Creek Dam. Olympia, Wash: Shorelands & Water Resources Program, Technical Support Section, Washington State Dept. of Ecology, 1997.

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Części książek na temat "EARTHEN DAM"

Sharma, Rohit, i Bappaditya Manna. "Failure Analysis of Homogeneous Earthen Dam". W Lecture Notes in Civil Engineering, 829–37. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6564-3_68.

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Joshi, Sandhya, Himanshu Pratap Singh i Suprakash Biswas. "Analysis of Seismic Behavior of an Earthen Dam". W Lecture Notes in Civil Engineering, 641–53. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1890-4_51.

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Mohammed, Asif Ali, S. Sasanka Mouli i J. Y. V. Shiva Bhushan. "Design of Core of Earthen Dam by Replacement with Geosynthetics". W Lecture Notes in Civil Engineering, 69–77. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5601-9_7.

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Kar, Saurav Shekhar, i L. B. Roy. "Slope Stability Analysis of an Earthen Dam Using GEOSTUDIO 2007 Software". W Lecture Notes in Civil Engineering, 693–704. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6346-5_60.

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Trivedi, Hridesh Kumar, Nikita Choudhari i Sumit Gandhi. "Geotextile Filters in Earthen Dam—A Review Study on Construction and Rehabilitation". W Springer Proceedings in Energy, 79–94. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6879-1_10.

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Preethi, R. S., L. Govindaraju, K. S. Swamy i R. M. Thejaswini. "A Case Study on the Evaluation of Seismic Response of Earthen Dam". W Lecture Notes in Civil Engineering, 321–33. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4005-3_27.

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Onderka, Zdzislaw, i Robert Schaefer. "Markov chain based management of large scale distributed computations of earthen dam leakages". W Vector and Parallel Processing — VECPAR'96, 49–64. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/3-540-62828-2_112.

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Kumar, V., P. Samui, A. Burman i N. Himanshu. "Multivariate Adaptive Regression Spline Based Reliability Analysis of Stability of Durgawati Earthen Dam". W Lecture Notes in Civil Engineering, 81–93. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6233-4_6.

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Tung, Smita, Sibapriya Mukherjee i Gupinath Bhandari. "Effect of Seepage Barrier in Steady Seepage Below Earthen Dam by Centrifuge Modeling". W Dynamics of Soil and Modelling of Geotechnical Problems, 179–93. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-5605-7_17.

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Rout, Shuvranshu, Anup Mandal, Biswajit Das i Manos De. "Retrofitting of Existing Earthen Fly Ash Dam by Finger Drains and Gabion Wall". W Lecture Notes in Civil Engineering, 863–74. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6564-3_71.

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Streszczenia konferencji na temat "EARTHEN DAM"

Yue, Sheng, Emile Damisse i Matahel Ansar. "Methodology for Earthen Dam Breach Analysis". W World Environmental and Water Resources Congress 2016. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784479872.011.

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Case, Jared, Craig Hickey i Gregory Hanson. "Earthen Embankment Dam Inspection Using Electrical Resistivity Tomography". W Symposium on the Application of Geophysics to Engineering and Environmental Problems 2012. Environment and Engineering Geophysical Society, 2012. http://dx.doi.org/10.4133/1.4721881.

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Abdul Jabbar JAMEL, Asmaa. "EVALUATE STRESSES GENERATED IN EARTHEN DAMS USING GEO-STUDIO". W V. International Scientific Congress of Pure, Applied and Technological Sciences. Rimar Academy, 2022. http://dx.doi.org/10.47832/minarcongress5-1.

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Water leakage through the earth dam and the foundation is an important phenomenon that must be considered when designing earth dams, as it generates pore water pressure and causes internal erosion of the dam material that affects the stability of the dam by generating stresses and strain in it. There are a variety of technical methods available to minimize these concerns, such as using core, horizontal filter system, or by modifying the dam's geomatics specifications. The current study observed that at steady state flow through earth dam with horizontal filter, core, and no filter. Increasing the slope of the upstream dam reduces the amount of pore water pressure inside the dam body, while the maximum increase in pore water pressure occurs in the case of no filter. Furthermore, the highest stress at the dam's base is increased by the decrease in upstream slope. Furthermore, the dam's upstream slope has a significant effect on the values of the vertical and horizontal displacements created with in dam. Since the presence of the core generates the greatest increase in the horizontal displacement of the dam and foundation section. Changing the permeability coefficient of the dam body also produces a modification in the stresses at the dam's base by about ± 2%. Also, when utilizing the core, there is the lowest increase in seepage discharge, however when using the horizontal filter, there is the greatest rise in discharge (53.78 %) compared to the case without a filter. Furthermore, while using a horizontal filter, the percentage increase was (1.13%) as compared to when no filter being used

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Brown, Christopher J., Raphael Crowley i Nick Hudyma. "Geo-Hydro Forensic Investigation of an Earthen Dam Failure". W Eighth International Conference on Case Histories in Geotechnical Engineering. Reston, VA: American Society of Civil Engineers, 2019. http://dx.doi.org/10.1061/9780784482155.012.

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Carnevale, Mario, Jutta L. Hager i Robert A. S. Buller. "Investigation of Source of Seeps beneath Earthen Dam, Central Massachusetts". W Symposium on the Application of Geophysics to Engineering and Environmental Problems 2011. Environment and Engineering Geophysical Society, 2011. http://dx.doi.org/10.4133/1.3614118.

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O’Donal, Heather, Matthew Czapiga, Ezzat Elalfy, Enrica Viparelli i M. Hanif Chaudhry. "Effect of Dam Height on Breaching due to Overtopping of Non-Cohesive Earthen Dams". W World Environmental and Water Resources Congress 2023. Reston, VA: American Society of Civil Engineers, 2023. http://dx.doi.org/10.1061/9780784484852.021.

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Howell, Mark J., i Scott J. Ludlow. "Investigation of Seepage through an Earthen Dam Using Ground Penetrating Radar". W Symposium on the Application of Geophysics to Engineering and Environmental Problems 2001. Environment and Engineering Geophysical Society, 2001. http://dx.doi.org/10.4133/1.2922870.

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Ying, Xinya, i Sam S. Y. Wang. "2D Numerical Simulation of Breaching Process of Unlined Cohesive Earthen Dam". W World Environmental and Water Resources Congress 2010. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41114(371)141.

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J. Howell, Mark, i Scott J. Ludlow. "Investigation Of Seepage Through An Earthen Dam Using Ground Penetrating Radar". W 14th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2001. http://dx.doi.org/10.3997/2214-4609-pdb.192.chp_4.

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Raporty organizacyjne na temat "EARTHEN DAM"

Bell, Gary, i Duncan Bryant. Red River Structure physical model study : bulkhead testing. Engineer Research and Development Center (U.S.), czerwiec 2021. http://dx.doi.org/10.21079/11681/40970.

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The US Army Corps of Engineers, St. Paul District, and its non-federal sponsors are designing and constructing a flood risk management project that will reduce the risk of flooding in the Fargo-Moorhead metropolitan area. There is a 30-mile long diversion channel around the west side of the city of Fargo, as well as a staging area that will be formed upstream of a 20-mile long dam (referred to as the Southern Embankment) that collectively includes an earthen embankment with three gated structures: the Diversion Inlet Structure, the Wild Rice River Structure, and the Red River Structure (RRS). A physical model has been constructed and analyzed to assess the hydraulic conditions near and at the RRS for verification of the structure’s flow capacity as well as optimization of design features for the structure. This report describes the modeling techniques and instrumentation used in the investigation and details the evaluation of the forces exerted on the proposed bulkheads during emergency operations for the RRS.

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Blundell, S. User guide : the DEM Breakline and Differencing Analysis Tool—gridded elevation model analysis with a convenient graphical user interface. Engineer Research and Development Center (U.S.), sierpień 2022. http://dx.doi.org/10.21079/11681/45040.

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Gridded elevation models of the earth’s surface derived from airborne lidar data or other sources can provide qualitative and quantitative information about the terrain and its surface features through analysis of the local spatial variation in elevation. The DEM Breakline and Differencing Analysis Tool was developed to extract and display micro-terrain features and vegetative cover based on the numerical modeling of elevation discontinuities or breaklines (breaks-in-slope), slope, terrain ruggedness, local surface optima, and the local elevation difference between first surface and bare earth input models. Using numerical algorithms developed in-house at the U.S. Army Engineer Research and Development Center, Geospatial Research Laboratory, various parameters are calculated for each cell in the model matrix in an initial processing phase. The results are combined and thresholded by the user in different ways for display and analysis. A graphical user interface provides control of input models, processing, and display as color-mapped overlays. Output displays can be saved as images, and the overlay data can be saved as raster layers for input into geographic information systems for further analysis.

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Hungerman, Daniel, i Vivek Moorthy. Every Day is Earth Day: Evidence on the Long-term Impact of Environmental Activism. Cambridge, MA: National Bureau of Economic Research, kwiecień 2020. http://dx.doi.org/10.3386/w26979.

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Heffernan, Andrea, Ashley McAskill, Sara Snyder, Karl Burhop, Zak Hingst, Liz Levy i Suyun Ma. The Making of the 2010 Keep Columbus Beautiful Earth Day Celebration. University of Iowa, maj 2010. http://dx.doi.org/10.17077/qzxm-8td3.

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Lawrence, T., i G. R. Brooks. Stop 2-6: 1908 Notre-Dame-de-la-Salette earth flow. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2011. http://dx.doi.org/10.4095/289576.

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Puetz, Angela M., R. C. Olsen i Brian Anderson. Effects of LIDAR Point Density on Bare Earth Extraction and DEM Creation. Fort Belvoir, VA: Defense Technical Information Center, styczeń 2009. http://dx.doi.org/10.21236/ada534534.

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Dudley, J. P., i S. V. Samsonov. SAR interferometry with the RADARSAT Constellation Mission. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329396.

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The RADARSAT Constellation Mission (RCM) is Canada's latest system of C-band Synthetic Aperture Radar (SAR) Earth observation satellites. The system of three satellites, spaced equally in a common orbit, allows for a rapid four-day repeat interval. The RCM has been designed with a selection of stripmap, spotlight, and ScanSAR beam modes which offer varied combinations of spatial resolution and coverage. Using Differential Interferometric Synthetic Aperture Radar (DInSAR) techniques, the growing archive of SAR data gathered by RCM can be used for change detection and ground deformation monitoring for diverse applications in Canada and around the world. In partnership with the Canadian Space Agency (CSA), the Canada Centre for Mapping and Earth Observation (CCMEO) has developed an automated system for generating standard and advanced deformation products and change detection from SAR data acquired by RCM and RADARSAT-2 satellites using DInSAR processing methodology. Using this system, this paper investigates four key interferometric properties of the RCM system which were not available on the RADARSAT-1 or RADARSAT-2 missions: The impact of the high temporal resolution of the four-day repeat cycle of the RCM on temporal decorrelation trends is tested and fitted against simple temporal decay models. The effect of the normalization and the precision of the radiometric calibration on interferometric spatial coherence is investigated. The performance of the RCM ScanSAR mode for wide area interferometric analysis is tested. The performance of the novel RCM Compact-polarization (CP) mode for interferometric analysis is also investigated.

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Papasodoro, C., D. Bélanger, G. Légaré-Couture i H. Russel. Assessment of approaches and costs associated with the correction of the HRDEM product data in the Canadian Arctic. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331974.

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The High-Resolution Digital Elevation Model (HRDEM) was created as part of the National Elevation Data Strategy to provide detailed elevation data across the country. For the Canadian Arctic, the HRDEM was based on the ArcticDEM initiative with additional post-processing by the Canada Centre for Mapping and Earth Observation to create a 2-meter Digital Surface Model (DSM) covering a geographic region of approximately 4.6 million km2. This report provides details on the investigation of the data issues within HRDEM in the North, available open and commercial sources of elevation data that could be used to improve the product, and technologies available to generate high resolution DSM at similar levels of accuracy and resolution than the current HRDEM. In addition, the report summarizes the results of a research into the common, as well as more advanced (e.g., machine learning), methods for improving the product. In summary, the intent of this investigation was to provide supporting information to address the data anomalies in HRDEM and present a path forward.

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Wiltsche, Harald. Lifeworld and Science. Linköping University Electronic Press, grudzień 2022. http://dx.doi.org/10.3384/9789179295752.

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To say that we—and with “we” I mean humanity as a whole—have big challenges ahead of us would be a massive understatement. The earth’s climate crossed several crucial tipping points this year. Our lives are still overshadowed by a pandemic whose societal repercussions we do not even begin to fathom. And we are at the brink of a new era in which our biggest evolutionary advantage so far—our intellect—will be outrivaled massively by machines. I take it for granted that the only realistic chance to deal with these challenges is science and the technology we build on the basis of scientifc insight. Of course, I am not saying that science alone will be able to save the day. But just like it took a scientifcally engineered vaccine to turn things around with COVID-19, we will need more than thoughts and prayers to preserve a su¡ciently stable biosphere for our children and grandchildren...

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Hodul, M., H. P. White i A. Knudby. A report on water quality monitoring in Quesnel Lake, British Columbia, subsequent to the Mount Polley tailings dam spill, using optical satellite imagery. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/330556.

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In the early morning on the 4th of August 2014, a tailings dam near Quesnel, BC burst, spilling approximately 25 million m3 of runoff containing heavy metal elements into nearby Quesnel Lake (Byrne et al. 2018). The runoff slurry, which included lead, arsenic, selenium, and vanadium spilled through Hazeltine Creek, scouring its banks and picking up till and forest cover on the way, and ultimately ended up in Quesnel Lake, whose water level rose by 1.5 m as a result. While the introduction of heavy metals into Quesnel Lake was of environmental concern, the additional till and forest cover scoured from the banks of Hazeltine Creek added to the lake has also been of concern to salmon spawning grounds. Immediate repercussions of the spill involved the damage of sensitive environments along the banks and on the lake bed, the closing of the seasonal salmon fishery in the lake, and a change in the microbial composition of the lake bed (Hatam et al. 2019). In addition, there appears to be a seasonal resuspension of the tailings sediment due to thermal cycling of the water and surface winds (Hamilton et al. 2020). While the water quality of Quesnel Lake continues to be monitored for the tailings sediments, primarily by members at the Quesnel River Research Centre, the sample-and-test methods of water quality testing used, while highly accurate, are expensive to undertake, and not spatially exhaustive. The use of remote sensing techniques, though not as accurate as lab testing, allows for the relatively fast creation of expansive water quality maps using sensors mounted on boats, planes, and satellites (Ritchie et al. 2003). The most common method for the remote sensing of surface water quality is through the use of a physics-based semianalytical model which simulates light passing through a water column with a given set of Inherent Optical Properties (IOPs), developed by Lee et al. (1998) and commonly referred to as a Radiative Transfer Model (RTM). The RTM forward-models a wide range of water-leaving spectral signatures based on IOPs determined by a mix of water constituents, including natural materials and pollutants. Remote sensing imagery is then used to invert the model by finding the modelled water spectrum which most closely resembles that seen in the imagery (Brando et al 2009). This project set out to develop an RTM water quality model to monitor the water quality in Quesnel Lake, allowing for the entire surface of the lake to be mapped at once, in an effort to easily determine the timing and extent of resuspension events, as well as potentially investigate greening events reported by locals. The project intended to use a combination of multispectral imagery (Landsat-8 and Sentinel-2), as well as hyperspectral imagery (DESIS), combined with field calibration/validation of the resulting models. The project began in the Autumn before the COVID pandemic, with plans to undertake a comprehensive fieldwork campaign to gather model calibration data in the summer of 2020. Since a province-wide travel shutdown and social distancing procedures made it difficult to carry out water quality surveying in a small boat, an insufficient amount of fieldwork was conducted to suit the needs of the project. Thus, the project has been put on hold, and the primary researcher has moved to a different project. This document stands as a report on all of the work conducted up to April 2021, intended largely as an instructional document for researchers who may wish to continue the work once fieldwork may freely and safely resume. This research was undertaken at the University of Ottawa, with supporting funding provided by the Earth Observations for Cumulative Effects (EO4CE) Program Work Package 10b: Site Monitoring and Remediation, Canada Centre for Remote Sensing, through the Natural Resources Canada Research Affiliate Program (RAP).

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