Artykuły w czasopismach: „EARTHEN DAM”

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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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Thanh, Luong Duy, Nguyen Canh Thai, Nguyen Manh Hung, Nguyen Cong Thang i Luong Thi Thanh Huong. "SELF-POTENTIAL METHOD FOR DETECTION OF WATER LEAKAGE THROUGH DAMS". Earth Science Malaysia 4, nr 2 (7.10.2020): 152–55. http://dx.doi.org/10.26480/esmy.02.2020.152.155.

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The self-potential (SP) method is a passive, non-invasive and cost-effective geophysical method based on the measurement of electrical potential naturally occurring on the earth’s surface. One of the main causes for the electrical potential at the earth’s surface is water seepage under the ground. In this work, we perform the SP measurement on a small artificial earthen dam built at Thuyloi University. Our result shows that the selection of electrode types is crucial in the SP measurements. Namely, Cu/CuSO4 porous pots are much better than copper stake electrodes for the SP measurement. Additionally, it is shown that the SP measurement using suitable electrodes can be applied to detect underground water leakage and flow direction in the dam based on an anomaly and variation of electric potential with position on the survey area.

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Gebregziabher, H. F., i F. Gebrehiwot. "Overall Stability Analysis of Ribb Earthen Dam in Ethiopia". International Journal of Advanced Science and Engineering 8, nr 2 (15.11.2021): 2181. http://dx.doi.org/10.29294/ijase.8.2.2021.2181-2187.

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WHITE, R. S. "The Risk of Earthen Dam Failure Due to Earthquakes". Environmental & Engineering Geoscience III, nr 4 (1.12.1997): 585–87. http://dx.doi.org/10.2113/gseegeosci.iii.4.585.

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AKHMETOV, Yermek M., Kambar M. ASSEMOV i Victor N. SHAYTOROV. "Geophysical survey of earthen dam using the electrical prospecting methods". Contributions to Geophysics and Geodesy 50, nr 2 (29.07.2020): 249–59. http://dx.doi.org/10.31577/congeo.2020.50.2.4.

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The hydraulic structures for the land reclamation needs and their operation are the objects of careful attention. The water-bearing earth dams of small height pose an extra danger, where the accident occurs the most often. Such facilities should be constantly monitored to prevent the dangerous incidents. The article discusses an alternative method for studying the filtration properties of earth dams by the electrical parameters – resistivity, induced polarization and self-potential. The relative polarizability was used to exclude the influence of electrical resistivity to the induced polarization data. A study of advanced technology to identify the filter zones was carried out on an earthen dam in the Almaty region, Kazakhstan. The measurement data for three profiles are presented as the sections form in the parameters of resistivity and relative polarizability. Their complex interpretation with the respect of self-potential data, is given as a diagram of probable filtration paths. This is possibly due to the local increased watering in the dam loamy body. Then, the electric and self-potential parameters were evaluated to determine the filtering zones. The study results of above parameters have identified several water-saturated zones in the dam body. This technology could be used to estimate the condition of such objects and their engineering-geological monitoring.

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Belmihoub, H., A. Hamza i N. Mesboua. "Modelling of in Earthen Dam Under the Effect of Seismic Loading, Case of the Taksebt Dam (Algeria)". Journal of Applied Engineering Sciences 12, nr 1 (1.05.2022): 17–26. http://dx.doi.org/10.2478/jaes-2022-0003.

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Abstract The prediction of displacements in earthen dams after seismic loading is necessary to ensure their proper functioning. In this study, the finite element software plaxis 2D is used to model the nonlinear dynamic behavior (elasto-plastic) of the embankment dam solicited by real seismic records. The earth dam considered in our case study is the Taksebt dam located in the north-east of Algeria. The main steps of the modeling are the following: first the dam of Taksebt was analyzed under seismic stresses without water (empty). Then the dam of Taksebt is subjected to the same seismic records with water (full). The comparison of the study cases allows us to estimate the displacements in the two main directions (horizontal and vertical).The results obtained show the ability to estimate the displacements in an embankment dam under seismic excitation. In addition, the analysis time will be reduced considerably by considering the two extreme cases of seismic loading.

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Sun, Yiqing, Zhenzhong Shen, Liqun Xu, Lei Gan, Wenbing Zhang, Jinmeng Yang, Hongwei Zhang i in. "Sensitivity Study of the Computational Parameters for the Deformation of Homogeneous Earth Dams". Mathematical Problems in Engineering 2021 (26.11.2021): 1–17. http://dx.doi.org/10.1155/2021/2216366.

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The deformation of dams has always been the focus of dam safety research. To more accurately study the effect of the Duncan–Chang model on the deformation of homogeneous Earth dams, this paper simulates the displacement variation of a homogeneous Earth dam through the finite element method based on the Duncan–Chang E-B model. The sensitivity of the Duncan–Chang E-B model parameters and the dam material density on the displacement of a homogeneous earthen dam in Gansu Province, China, were investigated using single-factor and multifactor analysis methods. The results show that the displacement variation of the dam during the completion and operation periods is consistent with the general rule for Earth and rock dams; the three parameters R f , φ 0 , and Δ φ are more sensitive to dam deformation; and the three parameters m , n , and K are less sensitive to dam deformation.

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CHARATPANGOON, Bhuddarak, Junji KIYONO, Aiko FURUKAWA i Chayanon HANSAPINYO. "FAILURE OF AN EARTHEN DAM AND ITS POSSIBLE STRENGTHENING METHODS". Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)) 71, nr 4 (2015): I_179—I_190. http://dx.doi.org/10.2208/jscejseee.71.i_179.

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Gordan, Behrouz, i Azlan Bin Adnan. "Dynamic Analysis of Homogenize Earthen Dam Using Blanket Layer Technique". International Journal of Geotechnical Earthquake Engineering 4, nr 1 (styczeń 2013): 68–82. http://dx.doi.org/10.4018/jgee.2013010105.

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Construction of earthen dams has developed quickly to access water and electricity. The earthquake phenomena can generate cracks at the crest, and transferred them to the structural body. It has occurred during the interaction between structure and reservoir. In this context, some reinforcement techniques have experienced according to the literature. They have included a perpendicular drain, prefabricated vertical drain, Geosynthetic in some layers within the structure, Pile, injection and cut off wall system on the dam foundation. Most of them controlled this aspect costly. The Finite-element method has applied via plane strain aspect using the ANSYS13. This paper evaluated effects of using blanket layer between a short homogenized earthen dam and weak foundation on the dynamic behavior throughout the seismic process. As a result, clay soil in the blanket layer with a modulus elasticity ratio equal to 2.50 between it, and loose sand of foundation has indicated the optimal approach. It has revealed that, this method can be changed the situation of the minimum and maximum value of shear stress when it has located in the middle of the foundation without the blanket layer at the end of vibration.

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Chen, Sheng-shui, Qi-ming Zhong i Guang-ze Shen. "Numerical modeling of earthen dam breach due to piping failure". Water Science and Engineering 12, nr 3 (wrzesień 2019): 169–78. http://dx.doi.org/10.1016/j.wse.2019.08.001.

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Panulinova, Eva, i Slavka Harabinova. "Methods for Analyzing the Stability of an Earthen Dam Slope". Advanced Materials Research 969 (czerwiec 2014): 245–48. http://dx.doi.org/10.4028/www.scientific.net/amr.969.245.

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The slope stability of a water construction in four cross-profiles is analyzed in the article and the factors of safety reviewed. The GEO 5 software package for slope stability calculations is an essential component of work. The computer software was employed to simulate and calculate the stability in the particular profiles of the downstream and upstream slopes of the Domaša Dam. Bishop, Petterson and Sarma methods were applied to determine the critical factors of safety.

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Tung, Smita, Gupinath Bhandari i Sibapriya Mukherjee. "Behavior of sheet pile as seepage cutoff below earthen dam". International Journal of Geotechnical Engineering 10, nr 2 (12.01.2016): 162–73. http://dx.doi.org/10.1080/19386362.2015.1105620.

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KRUTOV, D. A. "SEISMIC STRENGTHENING OF THE EARTHEN DAM: DETAIL DESIGN AND CALCULATIONS". Prirodoobustrojstvo, nr 1 (2020): 79–88. http://dx.doi.org/10.26897/1997-6011/2020-1-79-88.

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Loginov, V. A., i V. A. Shabanov. "Filtration flows in the upper wedge of an earthen dam". Power Technology and Engineering 45, nr 5 (styczeń 2012): 338–40. http://dx.doi.org/10.1007/s10749-012-0272-6.

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Kyaw, Pa Pa Shwe Sin, i Taro Uchida. "Assessment of the Breaching Event, Breach Parameters and Failure Mechanisms of the Spillway Collapse in the Swa Dam, Myanmar". Water 15, nr 8 (12.04.2023): 1513. http://dx.doi.org/10.3390/w15081513.

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The spillway of the Swa earthen dam, constructed in Yedashe Township, Bago Region, Myanmar, collapsed suddenly on 29 August 2018 and resulted in a huge flood to downstream areas causing fatalities and the displacement of thousands of localities. This study aimed to assess the spillway breaching process in terms of the breaching parameters such as the average breach width, failure time and peak outflow, and failure mechanisms. We analyzed the event from the changes in the study site before and after the event and used water discharge conditions from satellite data and water level records during the event. We compared the breaching parameters using empirical equations from past failed events with tested scenarios for failure mechanisms, such as overtopping and piping. According to satellite data, 97% of the storage from the reservoir was discharged, and the peak breach outflow rate was 7643 m3/s calculated from the water level records. The selected empirical formulas were applied, and the estimated average breach widths, failure times and peak discharge from the formulas were larger in overtopping and nearer in piping than that of the observed data for the Swa Dam. Thus, a concrete spillway might impact the erodibility rate of breaching compared with concrete-faced and earthen dam types.

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Al-Fares, Walid. "Characterization of the leakage problem in Salhab earthen dam using electrical resistivity tomography and SP measurements, Syria". Contributions to Geophysics and Geodesy 49, nr 4 (1.12.2019): 441–58. http://dx.doi.org/10.2478/congeo-2019-0023.

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Abstract The earthen dam of Salhab is located in the southern margins of Al-Ghab plain at 3–4km of Salhab town northern-west of Syria. The dam consists of two separated embankments: the main one extends east-west along a distance of 895 m with 14.5 m height, while the second embankment towards northwest-southeast over a distance of 510 m and 11 m of height. The dam crest has a constant topographic elevation of 220 m above sea level (a.s.l). Electrical Resistivity Tomography surveys (ERT) combined with a Self-Potential measurements (SP), were implemented at the upstream and at the top of the main and the secondary embankments of the dam in order to identify the possible leakage zones under the dam’s body. The interpretation of the ERT sections and the SP measurements, carried out at the upstream side, revealed a distinct zone of leakage extending along the beginning and the end parts under the main embankment. Moreover, many punctual anomalous spots of low resistivity values were recognized within the dam’s clay core. One of those spots was confirmed by the implementation of a detailed ERT profile and by a piezometric borehole drilled at the top of the dam. Whereas, the clay core of the secondary embankment seems relatively coherent and homogeneous as well as a trace of a tectonic fault was identified under the end part of the embankment body but no manifestations of leakage were observed under and behind the secondary dam body.

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Khan, Muhammad Israr, Shuhong Wang i Zhangze . "ANALYSIS OF EARTH FILL HYDRAULIC DAM WITH VARYING CREST LENGTH AND PERMEABILITY TO DEVELOP CORRELATIONS". Engineering Heritage Journal 4, nr 2 (27.07.2020): 34–38. http://dx.doi.org/10.26480/gwk.02.2020.34.38.

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In this paper, an earthen dam is analysed using different soil layers having different soil properties and dimensions. Normally a slope fail when the shear strength reduces from the minimum required value which keeps it stable. Internal erosion is the main cause which causes a dam to fail and it is mainly due seepage with time. A detail analysis of a predefined dam slope is performed in different layers to check the seepage variation as well as the factor of safety. Different soil layers and properties were used such that it is investigated from a fail condition to a complete stable condition. Limit equilibrium and finite element approaches are used. Correlations for factor of safety between these two approaches are also developed. These correlations and results could be used as guidelines in any dam or slope safety calculation.

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Tran, Chau Kim. "Sensitivity Analysis of Dam Breach Parameters for Variation Capacity Earthen Dams". Asian Journal of Water, Environment and Pollution 18, nr 3 (29.07.2021): 1–9. http://dx.doi.org/10.3233/ajw210023.

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Sensitivity analysis is an effective tool to determine the robustness of an assessment by examining the extent to which the results are affected by changes in input. In this study, the FAST method was applied to analyse the sensitivity to the earth dam failure process. Four (04) input variables were selected including breach development time, breach width, side slope, and initial breach position. The effects of these parameters on the two (02) outputs i.e., the maximum outflow, and rising time were assessed. The study was applied to 08 reservoirs with different capacities. The sensitivity analysis showed that the development time and initial breach location dominantly affect these outputs. Additionally, development time is the most important factor in rising time. The lateral slope has an insignificant effect on outputs. The effect of breach width can be neglected to rising time, however, its influence on maximum outflow is significant. The results of this study show the role of input variables in the flow hydrograph due to dam failure. Through this research, the workload of the breach parameter analysis process can be substantially reduced.

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Olimpiev, D. N., A. Makhmudov, M. Mamazhanov, B. Shakirov i Y. Sattiev. "Stress - strain state dams on a loess subsidence base". IOP Conference Series: Earth and Environmental Science 954, nr 1 (1.01.2022): 012002. http://dx.doi.org/10.1088/1755-1315/954/1/012002.

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Abstract The article presents the calculation of the stress-strain state of an earthen dam on a loess base on a computer. The calculation of the joint operation of the dam with the foundation was carried out using finite difference methods using shifted approximating grids (displacements and velocities are determined at the nodes of one mesh; deformations and stresses at the nodes on the other). The use of the developed algorithm, on the one hand, and the improvement of the mathematical model of the soil, based on experimental studies of samples for expansion, on the other hand, make it possible to assess the formation of trenches by calculation methods. The obtained calculation results are compared with the data of experimental model studies of the stress-strain state of an earthen dam with a subsidence base on a centrifuge. The correctness of the previously stated position was confirmed that for calculations of crack formation, the values of the limiting extensibility of the soil should be taken. It is necessary to determine these values by simulating the complex stress state of soil samples in laboratories. The areas of the dam have been identified as potentially the most in terms of cracking (a ridge zone with low compressive loads, close to uniaxial expansion in terms of operating conditions, and near-edge buried in places of a sharp break in the slope of the banks with significant stresses and destruction of soil material in a complex stress state by tension with sliding).

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Kurzekar, Ujwal. "Design of Kawlewada Dam and its Components". International Journal for Research in Applied Science and Engineering Technology 9, nr VII (10.07.2021): 100–108. http://dx.doi.org/10.22214/ijraset.2021.36245.

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This paper presents the design and stability analysis of Kawlewada dam (a concrete gravity dam situated in kawlewada village of gondia district) and its components. Through, the demanding years, it has been observed that failures of dams due to many factors are common. So, it is the essential to analysis the various components, parts of dam against all its modes of failures, forces acting on it, uncontrollable disasters such as earthquake, disaster, etc. For this, the preliminary data of the dam required for design, such as control levels, dimensions, crest width, base width, etc. was collected through the Inspection Engineer, posted at Dhapewada Lift Irrigation Office, Tirora, Dist. Gondia. On the basis of collected data the elementary profile and practical profile of dam was estimated, further all the major and the minor force forces acting on dam were calculated, stability analysis of designed dam against all modes of failure and for various load combinations was carried out in STAAD PRO software and was checked for permissible limits. Design of spillway, stilling basin and earthen dam was also carried out for the designed dam. Further, canal originating from the dam and carrying water to culturable command area was also designed by taking care of peak discharge as required by crops.

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Chakrabort, Debarghya, i Deepankar Choudhury. "Investigation of the Behavior of Tailings Earthen Dam Under Seismic Conditions". American Journal of Engineering and Applied Sciences 2, nr 3 (1.03.2009): 559–64. http://dx.doi.org/10.3844/ajeassp.2009.559.564.

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Demianiuk, Alla V., i Dmytro V. Stefanyshyn. "Identification of Earthen dam seepage regime under condition of data ambiguity". Environmental safety and natural resources 30, nr 2 (3.07.2019): 30–43. http://dx.doi.org/10.32347/2411-4049.2019.2.30-43.

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Himanshu, N., i A. Burman. "Seepage and Stability Analysis of Durgawati Earthen Dam: A Case Study". Indian Geotechnical Journal 49, nr 1 (30.10.2017): 70–89. http://dx.doi.org/10.1007/s40098-017-0283-1.

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Kahot, Zakariae, Rachid Dkiouak i Abdellatif Khamlichi. "Reliability analysis of slope stability in earthen dams following rapid drawdown". International Review of Applied Sciences and Engineering 10, nr 1 (czerwiec 2019): 101–12. http://dx.doi.org/10.1556/1848.2018.0011.

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This work was dedicated to assessing reliability of slope stability in earthen dams following rapid drawdown. Modeling of the problem physics was based on saturated-unsaturated seepage flow through the nonlinear Richards equation, under the assumption of two-dimensional approximation in steady state and transient state. The modeling of seepage taking place inside the earth dam infill materials included soil parameters, the negative pore water pressure-hydraulic conductivity relationship as well as the negative pore water pressure-volumetric water content. Slope stability was analyzed by using safety factor as evaluated by the Bishop's simplified method. Solution of the governing equations in terms of pore water pressure and fluid flow velocity was performed by using the modules SEEP/W and SLOPE/W of the Finite Element based software package GeoStudio. The drawdown phenomenon was then analyzed and its influence on dam stability assessed by using surface response method and Monte Carlo simulation. A design formula was proposed in order to bound the probability of failure associated to slope stability.

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Wise, Jarrett, Sherry Hunt i Mohammed Al Dushaishi. "Prediction of Earth Dam Seepage Using a Transient Thermal Finite Element Model". Water 15, nr 7 (6.04.2023): 1423. http://dx.doi.org/10.3390/w15071423.

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With the majority of the United States Department of Agriculture-Natural Resources Conservation Service (USDA-NRCS)-sponsored earthen dams exceeding their planned service life, seepage is a concern since it is a common failure mechanism among earthen dams as a whole. Seepage occurs when water penetrates a hydraulic barrier to create open pathways, channels, or piping leading to internal erosion or stability issues due to increased effective stress. Due to the complex geometries of these hydraulic structures, time-dependent boundary conditions, and complicated failure analyses, numerical approaches have been used to estimate seepage. However, the existing numerical models are either computationally expensive or assume steady-state conditions. This work develops the framework for using a transient thermal finite element analysis (FEA) model as an analogy to predict transient seepage. The FEA model is compared to a transient analytical model to verify the approach. A sensitivity analysis of the FEA model shows that the time aspect of seepage flow is dependent on the medium, i.e., soil, and not on the fluid properties.

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Říha, Jaromír, Stanislav Kotaška i Lubomír Petrula. "Dam Break Modeling in a Cascade of Small Earthen Dams: Case Study of the Čižina River in the Czech Republic". Water 12, nr 8 (17.08.2020): 2309. http://dx.doi.org/10.3390/w12082309.

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Failures of small dams can pose a serious threat to people and property even if the size of the schemes is relatively low. In many cases, small dams are situated in a cascade along streams, meaning that the failure of the uppermost dam may cause the dams downstream to fail. In this paper, a cascade of three small reservoirs, Lichnov II (14.6 m high), Lichnov III (10 m high), and Pocheň (8.5 m high), is the subject of the dam break analyses carried out via various methods such as empirical formulae, analogy, and hydraulic modeling. The dam-break flood routing was simulated using a shallow water flow hydraulic model. The simulations confirm that the attenuation effect of the peak discharge is governed by the flood volume, slope, and morphology of the floodplain and increases with the distance from the breached dam following an approximately exponential trend. When estimating peak discharge, empirical formulae derived for a single dam break should be applied carefully as they may underestimate the peak outflow by up to 10% in the case of a dam cascade. The attenuation volume of small reservoirs is small when compared to the flood volume, meaning that the attenuation of the peak discharge usually varies between 5–10%.

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Zhang, R. V., A. A. Yakimov, A. A. Zhang i P. S. Zabolotnik. "Assessment of flood-control dam stability in Yakutsk (Russia)". Arctic and Subarctic Natural Resources 28, nr 1 (4.04.2023): 56–67. http://dx.doi.org/10.31242/2618-9712-2023-28-1-56-67.

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The article presents the results of an investigation of the permafrost conditions of the embarkment dam in Yakutsk, which is located in the low floodplain of the Lena River. Dam site 3 rests on thawed soils represented by multi-grained water-saturated alluvial sands of various densities. The measured soil temperature alters from +6 to +6.4°C at a depth of 10 m. The high temperature was attributable to the discharge of warm water from the Combined heat and power (CHP) plant in Yakutsk into the enclosed cooling pond. Electrical resistivity tomography (ERT) is a highly effective geophysical method for delineating seepage zones in the earthen dam body, and determining the upper permafrost table at the base of construction. We have provided recommendations for the static and filtration stability of the study site.

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Kishida, Tadahiro, DongSoon Park, Rita L. Sousa, Richard Armstrong i Young-Ji Byon. "Modulus reductions of dam embankment materials based on downhole array time series". Earthquake Spectra 36, nr 1 (28.11.2019): 400–421. http://dx.doi.org/10.1177/8755293019878182.

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A database of three-component acceleration time series recorded at downhole arrays in earthen dam cores was published by the Japan Commission on Large Dams. This study reviews the acceleration time series in nine earthfill and rockfill dams in Japan. The apparent shear wave velocities between downhole sensors in each dam during strong shakes are determined by calculating the wave travel time between the recorded time series. Transient shear strains are calculated from the differences in the displacement time series between sensors through the double integration of filtered acceleration time series. The modulus reduction curves of the in situ core materials are constructed by combining the apparent shear wave velocities and shear strains. The modulus reduction data are then compared with empirical models. Observations show considerable uncertainties and dam-dependent characteristics in the extracted in situ shear modulus. Accordingly, this study proposes a methodology to update the empirical modulus reduction model for dam core materials on the basis of observed data on downhole time series.

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Vivekananda, Sankarpana, i Chappidi Hanumantha Rao. "Probabilistic stability analysis of narasimharaya sagar earthen dam by using geo-studio software". E3S Web of Conferences 391 (2023): 01039. http://dx.doi.org/10.1051/e3sconf/202339101039.

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Since every potential failure scenario might result in significant losses in both lives and property, the construction of dams needs extensive research to ensure the safety and feasibility of these large engineering structures. In this article, the Analyses should be performed upon specifically to evaluate seepage, slope stability, and soil liquefaction of significant earthen dam. A numerical technique employing the finite element method (FEM) was used in this article. Finite element software (GEO-STUDIO 2022) was used to carry out both steady-state and transient seepage analyses and pseudo-static ground motion That deals with the present work behavior of the Narasimharaya Sagar (Gorakallu Balancing Reservoir) earthen dam which is in the earthquake prone area of Zone II (as per IS 1893-2002).Geostudio 2022’s SLOPE/W, SEEP/W, and QUAKE/W tools examine the stability characteristics slope, seepage, and earthquake (finite element modelling based software). The model with the reservoir at full capacity is initially examined using SEEP/W to identify the piezometric line, which serves as the foundation for SLOPE/W to determine slope stability. Afterwards, it is exposed to a 0.1 peak ground acceleration earthquake motion using QUAKE/W to know its dynamic stability.

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Mullo-Sinaluisa, Anthony, Carla Oquendo-Borbor, Andrés Velastegui-Montoya, Bethy Merchan-Sanmartín, Miguel Chávez-Moncayo, Viviana Herrera-Matamoros i Paúl Carrión-Mero. "Hill Dam Design to Improve Water Use in Rural Areas—Case Study: Sacachún, Santa Elena". Sustainability 14, nr 19 (27.09.2022): 12268. http://dx.doi.org/10.3390/su141912268.

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The Sacachún commune in Ecuador currently faces a lack of water for its agricultural development; this reduces its possibilities of socio-economic development and causes migration to urban areas. This research proposes a presa colinar (hill dam) design that uses ancestral knowledge and classic engineering techniques to promote water use during the dry season in semi-arid regions. The methodology consisted of: (i) a systematic compilation of the ancestral structures used for water planting and harvesting in Ibero-American; (ii) selecting an appropriate place to build the hill dam; (iii) the dam’s body design; (iv) and creating a proposal for agricultural water use. The results helped define a good location for the hill dam implementation. In addition, a 10 m high and 40 m wide earthen dam was designed, with a storage capacity of 114,341 m3, extending agriculture to 7.5 ha through a polyculture system of six different plants. The embankment has a cofferdam located downstream, which provides stability in static and pseudo-static conditions. In addition, the dam slopes have a 2:1 ratio, and a spillway channel and filter drain were dimensioned to protect the dam.

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Rajković, Radmilo, Daniel Kržanović, Miomir Mikić i Emina Požega. "Rehabilitation of the landslide at the "Landfill 3" in the zone of the Čukaru Peki flotation tailing dump". Mining and Metallurgy Engineering Bor, nr 2 (2022): 27–34. http://dx.doi.org/10.5937/mmeb2202027r.

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The "Landfill 3" was formed at the location of the flotation tailing dump "Čukaru Peki", where the earthen material, created during the dam construction of the flotation tailing dump was placed. A part of the deposited material and substrate at this landfill has slipped that endangers the local road and "Kusak" stream at the landfill foot. That is why this landslide needs to be rehabilitated.

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Adams, Ryan F., Benjamin V. Miller, Wade H. Kress, Scott J. Ikard, Jason D. Payne i Walter H. Killion. "Evaluation of Electrical and Electromagnetic Geophysical Techniques to Inspect Earthen Dam and Levee Structures in Arkansas". Journal of Environmental and Engineering Geophysics 26, nr 4 (grudzień 2021): 287–303. http://dx.doi.org/10.32389/jeeg20-063.

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Within the State of Arkansas, there is an increasing number of aging dams and levees that have little to no documentation concerning their construction or composition. Surface geophysical surveys offer a non-intrusive method for investigating these structures to describe their lithologic makeup, evaluate the materials constructed upon, and identify potential flow paths through them. Techniques such as electrical resistivity tomography, seismic refraction, and electromagnetic induction have been used to image dams and levees. They require additional information from geologic outcrops, geotechnical borings, or drill cores to make informed geologic interpretations of the geophysical models. These geologic models then allow the owners of these structures to make more informed decisions about their operation and maintenance. Between 2011 and 2018, the U.S. Geological Survey conducted geophysical and geotechnical investigations of three earthen structures in Arkansas. Electrical and electromagnetic geophysical data were used to develop lithologic models of these structures and characterize the underlying geology. Self-potential surveys were utilized to detect the movement of water through these structures and identify any possible seepage pathways. Geotechnical methods such as electric and hydraulic direct-push well logs and cores acted as a control on the geophysical interpretations and a confirmation of anomalies. This integrated approach detected the lack of an impermeable core within a levee, imaged a change in lithology of the bedrock forming the seal beneath a gravity dam, and identified a potential seepage feature within the core of an earthen dam. These results further support that this method of extending known lithologic features via surface and borehole geophysics is a useful approach for characterizing earthen water-control structures.

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Wang, Cuizhen, Grayson Morgan i Michael E. Hodgson. "sUAS for 3D Tree Surveying: Comparative Experiments on a Closed-Canopy Earthen Dam". Forests 12, nr 6 (22.05.2021): 659. http://dx.doi.org/10.3390/f12060659.

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Defined as “personal remote sensing”, small unmanned aircraft systems (sUAS) have been increasingly utilized for landscape mapping. This study tests a sUAS procedure of 3D tree surveying of a closed-canopy woodland on an earthen dam. Three DJI drones—Mavic Pro, Phantom 4 Pro, and M100/RedEdge-M assembly—were used to collect imagery in six missions in 2019–2020. A canopy height model was built from the sUAS-extracted point cloud and LiDAR bare earth surface. Treetops were delineated in a variable-sized local maxima filter, and tree crowns were outlined via inverted watershed segmentation. The outputs include a tree inventory that contains 238 to 284 trees (location, tree height, crown polygon), varying among missions. The comparative analysis revealed that the M100/RedEdge-M at a higher flight altitude achieved the best performance in tree height measurement (RMSE = 1 m). However, despite lower accuracy, the Phantom 4 Pro is recommended as an optimal drone for operational tree surveying because of its low cost and easy deployment. This study reveals that sUAS have good potential for operational deployment to assess tree overgrowth toward dam remediation solutions. With 3D imaging, sUAS remote sensing can be counted as a reliable, consumer-oriented tool for monitoring our ever-changing environment.

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Hussain, Ruqiya Abed, i Asmaa Al-samarrae. "Theoretical Analysis and Development of an Artificial Neural Network Model to Evaluate Earthen Dam Slope Stability". Tikrit Journal of Engineering Sciences 29, nr 4 (5.11.2022): 1–9. http://dx.doi.org/10.25130/tjes.29.4.1.

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In the design of earth dams, it must be considered that the water leakage through the earth dam generates upward and pore pressure, in addition to leakage forces that cause internal erosion, which has a direct influence on the structural stability of this system. Also, the rising and dropping in the water level has a direct effect on the stability of the dam's face slope. One way to solve these issues is the installation of a core or a horizontal water drainage system. The present study relied on the GEO-Studio computer tool to evaluate cross-sectional models of earthen dams by determining the safety factor under different situations represented by a change in filter type, and the flow state as a result of raising and lowering the water level at the dam reservoir and the full fill condition of the dam reservoir. The research found that the existence of a core substantially contributed to improving the safety coefficient for the case of rising the water level (2m) and rapidly rising by assigning it the greatest safety coefficient values. The absence of a filter had an opposite influence on the safety coefficient by decreasing it. Also, the factor of safety for the downstream slope was affected by less than 5% for different flow conditions, compared with the higher effect generated by the upstream slope. Furthermore, an artificial neural network model with an accuracy ratio of more than 97% was developed for the predicted safety factor.

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Kamdi, Sumit, Sunny Durge, Pranay Dhoble, Sumit Bhoyar, Akash Uge, Pratik Patankar, Subodh Panday i Dr M. S. Dhande. "Fabrication of Floating Solar Power Plant". International Journal for Research in Applied Science and Engineering Technology 10, nr 6 (30.06.2022): 832–35. http://dx.doi.org/10.22214/ijraset.2022.43839.

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Abstract: Recently, the technology of floating photovoltaic panels has demonstrated several advantages over land installations, including faster deployment, less maintenance cost, and higher efficiency. Jayakwadi Dam is the second largest Earthen Dam in India with a surface area of 350 square km. Evaporation of water causes loss of very precious and scarce resources: freshwater. Fortunately, the lake is also located in a very rich area in solar energy. This paper presents a study to utilize Jayakwadi Dam surface for massive production of solar energy, while significantly reducing the loss of water by evaporation from the lake surface. The project has the potential to be one of the largest producers of low-cost clean electric energy in India. The study shows that the first phase of the project is expected todeliver about 86.12 MW/Day of electricity and save about 5.5 TMC per year of freshwater. The subsequent phases will provide low- cost green energy to replace the combustible fuels in Europe by 2045, while saving up to 10-12 billion m3 of freshwater lost by evaporation from Jayakwadi Dam. Keywords: Renewable energy, Evaporation Rate, solar power plants, floating Solar System, Case Study, Land Accusation.

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Dhadve, Aniket A., Buddhabushan R. Gaikwad, Vaibhav E. Damse, Prashant T. Hake i Dr N. V. Khadake. "Providing an Attempt to Reduce Evaporation Losses of Dam, By Providing Solar Panels: A Case Study of Jayakwadi Project". International Journal for Research in Applied Science and Engineering Technology 10, nr 4 (30.04.2022): 3268–72. http://dx.doi.org/10.22214/ijraset.2022.42065.

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Abstract: Recently, the technology of floating photovoltaic panels has demonstrated several advantages over land installations, including faster deployment, less maintenance cost, and higher efficiency. Jayakwadi Dam is the second largest Earthen Dam in India with a surface area of 350 square km. Evaporation of water causes loss of very precious and scarce resources: freshwater. Fortunately, the lake is also located in a very rich area in solar energy. This paper presents a study to utilize Jayakwadi Dam surface for massive production of solar energy, while significantly reducing the loss of water by evaporation from the lake surface. The project has the potential to be one of the largest producers of low-cost clean electric energy in India. The study shows that the first phase of the project is expected todeliver about 86.12 MW/Day of electricity and save about 5.5 TMC per year of freshwater. The subsequent phases will provide low- cost green energy to replace the combustible fuels in Europe by 2045, while saving up to 10-12 billion m3 of freshwater lost by evaporation from Jayakwadi Dam. Keywords: Renewable energy, Evaporation Rate, solar power plants, floating Solar System, Case Study, Land Accusation.

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Chanson, Hubert, i R. L. Whitmore. "Gold Creek dam and its unusual waste waterway (1890-1997): design, operation, and maintenance". Canadian Journal of Civil Engineering 25, nr 4 (1.08.1998): 755–68. http://dx.doi.org/10.1139/l98-005.

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Completed in 1885, the Gold Creek dam is an earthen dam located on the outskirts of Brisbane, Australia. The spillway system was refurbished three times, each time to increase the maximum overflow capacity. In 1890, a concrete stepped waterway was built to replace the damaged unlined-rock channel. This staircase chute is an unique structure: it is the first large man-made waste waterway built in Queensland, it is the only stepped weir built in Queensland before 1900, and it is, so far as the writers are aware, the first concrete-stepped spillway built for a large dam. The characteristics of the dam and its unusual stepped spillway are reviewed in a historical context. The design is compared with contemporary structures and present knowledge in stepped spillway design. The authors believe that the Queensland engineers gained expertise from overseas and within Australia for the stepped spillway design. However, the selection of concrete for the step construction was made by the local engineers and the reasons behind the decision are not yet understood.Key words: spillway design, engineering heritage, concrete construction, stepped weir, spillway operation, spillway refurbishment, 19th century structure.

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SEGHIR, Tarek, Ali FOURAR, Abdelatif ZEROUAL i Fawaz MASSOUH. "DYNAMIC MODELLING OF THE BEHAVIOUR OF THE OUARKISS EARTHEN DAM UNDER SEISMIC LOADS". GeoScience Engineering 66, nr 1 (31.03.2020): 40–52. http://dx.doi.org/10.35180/gse-2020-0029.

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Macchione, Francesco. "Model for Predicting Floods due to Earthen Dam Breaching. I: Formulation and Evaluation". Journal of Hydraulic Engineering 134, nr 12 (grudzień 2008): 1688–96. http://dx.doi.org/10.1061/(asce)0733-9429(2008)134:12(1688).

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Wang, Zhengang, i David S. Bowles. "Three-dimensional non-cohesive earthen dam breach model. Part 1: Theory and methodology". Advances in Water Resources 29, nr 10 (październik 2006): 1528–45. http://dx.doi.org/10.1016/j.advwatres.2005.11.009.

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Wang, Zhengang, i David S. Bowles. "Three-dimensional non-cohesive earthen dam breach model. Part 2: Validation and applications". Advances in Water Resources 29, nr 10 (październik 2006): 1490–503. http://dx.doi.org/10.1016/j.advwatres.2005.11.010.

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