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Journal articles on the topic 'CHANNEL SLOPE'

Author: Grafiati

Published: 11 September 2023

Last updated: 31 July 2025

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1

Zhang, Zhiming, Sai Wu, Huimin Miao, and Tong Zhang. "Numerical Investigation of Flow Channel Design and Tapered Slope Effects on PEM Fuel Cell Performance." Sustainability 14, no. 18 (2022): 11167. http://dx.doi.org/10.3390/su141811167.

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High-power proton exchange membrane (PEM) fuel cell vehicles are important for the realization of carbon neutrality in transportation. However, it is difficult to maintain enough fuel supply and quick water removal capacity at a high current density where reactant gas transportation and water concentration are directly affected by flow channel configurations. This study aims to investigate the tapered slope effects of a flow channel on fuel cell performance using a 3-D CFD model. The positive, negative, zero and hybrid tapered slopes are proposed to illustrate the fuel cell voltage, reactant g

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2

Moldamuratov, Zh N., A. A. Iglikov, E. B. Madaliyeva, S. Zh Daurbekova, and A. Sh Asylbekov. "CROSS-SECTION CHANNELS OF HYDRAULICALLY AND STATICALLY STABLE SHAPE." Bulletin of Kazakh Leading Academy of Architecture and Construction 86, no. 4 (2022): 199–209. http://dx.doi.org/10.51488/1680-080x/2022.4-20.

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The article presents the results of research on the substantiation of giving a stable shape of cross-section to the channels of hydro-reclamation systems of southern Kazakhstan. The calculations on the stability of irrigation channel slopes were made, as well as their design features and practical substantiation of stable profiles were presented. The shapes of stable slope were determined using of actual values of geotechnical parameters of slope soils. The results showed that the slope profile takes a stable shape during the channel operation, close to the parabolic.

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3

Debabeche, Mahmoud, Sonia Cherhabil, Amin Hafnaoui, and Bachir Achour. "Hydraulic jump in a sloped triangular channel." Canadian Journal of Civil Engineering 36, no. 4 (2009): 655–58. http://dx.doi.org/10.1139/l08-136.

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The hydraulic jump in a sloped triangular channel of 90° central angle is theoretically and experimentally examined. The study aims to determine the effect of the channel's slope on the sequent depth ratio of the jump. A theoretical relation is proposed for the inflow Froude number as function of the sequent depth ratio and the channel slope. An experimental analysis is also proposed to find a better formulation of the obtained relation. For this motive, six positive slopes are tested. The relations obtained are recommended for designing irrigation ditches.

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Huyghe, Pascale, Michel Foata, Eric Deville, Georges Mascle, and Caramba Working Group. "Channel profiles through the active thrust front of the southern Barbados prism." Geology 32, no. 5 (2004): 429–32. http://dx.doi.org/10.1130/g20000.1.

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Abstract Submarine channels of the Orinoco River were analyzed using high-quality, dense- coverage bathymetric and seismic data provided by a recent marine survey on the southern Barbados prism. Analysis of the syntectonic sediments on seismic profiles shows that the four to five frontmost structures show evidence of recent tectonic movement. Slope analysis of the major channels was performed. From their headwaters to domains of little or no active tectonics, the channels display <0.2% slope and form levees. Slope and incision increase gradually in domains of moderate tectonics, but deep ca

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Locat, Jacques, Ali Azizian, Jim Stronach, et al. "Morphological signature of gully development by rapid slide retrogression in a layered coarse-grained delta foreslope." Geological Society, London, Special Publications 500, no. 1 (2020): 219–34. http://dx.doi.org/10.1144/sp500-2019-159.

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AbstractCoarse-grained deltas are often characterized by steep foreslopes (often more than 10°) that are traversed by delta-front channels. The channels thus erode into relatively steeply inclined bedding. In this context, the slopes flanking the channels can be steeper than the friction angle since they include a component of dip related to the delta-front slope as well as the channel-related erosion slope. In this study, part of the Busu River delta (Papua New Guinea) was imaged using a high-resolution multibeam bathymetry survey over an area where the angle of the slopes flanking the channe

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Sümeghy, Borbála, and Tímea Kiss. "Morphological and hydrological characteristics of paleo-channels on the alluvial fan of the Maros River, Hungary." Journal of Environmental Geography 5, no. 1-4 (2012): 11–19. http://dx.doi.org/10.14232/jengeo-2012-43803.

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The aim of our research was to identify and map the paleo-channel systems on the alluvial fan of the Maros River and to analyse their spatial characteristics. The study on flow directions, horizontal channel parameters and paleo-discharge of the channels can help to forecast the maximum flood discharge and channel changes influenced by climate variations. The paleo-channel generations on the Maros alluvial fan form 13 zones with well defined boundaries. These zones can be either dominated by meandering (5), braided (2), or the mixture of meandering and braided patterns (3). The remaining three

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Harishidayat, Dicky, and Wasif Rehman Raja. "Quantitative Seismic Geomorphology of Four Different Types of the Continental Slope Channel Complexes in the Canterbury Basin, New Zealand." Applied Sciences 12, no. 9 (2022): 4386. http://dx.doi.org/10.3390/app12094386.

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Modern marine seismic reflection data have allowed for the study of the morphology of submarine channels in a 3D perspective. This study presents a quantitative analysis of continental slope channel complexes morphology within the Canterbury Basin (New Zealand). It aims to characterize the morphology and seismic facies of submarine channels to better understand their formative sedimentary processes, paleoenvironment, and petroleum prospectivity. Submarine channel morphometric parameters are measured at 150 m intervals perpendicular to the axis of channels complexes. Based on the morphology ana

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8

Karapetyan, M. A., S. K. Toygambayev, and Kh A. Abdulmazhidov. "Experimental studies of slope stability of reclamation drainage channels." Prirodoobustrojstvo, no. 4 (2024): 52–57. http://dx.doi.org/10.26897/1997-6011-2024-4-52-57.

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The article presents the results of experimental studies of the stability of slopes of reclamation channels. Experimental studies were carried out on the Grand Channel of the Laboratory of Sprinkler Machines and Hydraulic Drive of the Department of Organization and Technologies of Irrigation and Reclamation and Construction Works of the Institute of Land Reclamation, Water Management and Construction named after A.N. Kostyakov. The work of the reclamation drainage system is accompanied by the appearance of sediments, siltation of herbaceous and shrubby vegetation at the bottom and slopes of th

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9

Ziqi, Chen. "Design of the System of an Assemblable Channel Slope Weeder." Journal of Energy Research and Reviews 16, no. 7 (2024): 37–46. http://dx.doi.org/10.9734/jenrr/2024/v16i7361.

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If the grass roots of the water conveyance channel slope dig into the soil, it may cause the soil structure to loosen, and then increase the risk of slope landslide. The operation of manual cleaning weeds is dangerous due to the large slope of the channel. In this context, the design of a channel slope weeder that can adapt to different slopes is very important for the protection of the water channel slope. The weeder concept vehicle designed in this paper is mainly composed of four parts: drive car, frame mechanism, track mechanism and weeder mechanism. At the same time, the structure is anal

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10

Lee, Kyutae, Ali R. Firoozfar, and Marian Muste. "Technical Note: Monitoring of unsteady open channel flows using the continuous slope-area method." Hydrology and Earth System Sciences 21, no. 3 (2017): 1863–74. http://dx.doi.org/10.5194/hess-21-1863-2017.

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Abstract. The advent of low-cost pressure transducers capable of directly measuring water surface elevation enables continuous measurements of dynamic water surface slopes. This opens up a new possibility of dynamically monitoring unsteady flows (i.e., hysteresis) during the course of flood wave propagation. Hysteresis in this context refers to a looped stage–discharge rating caused by unsteadiness of flows. Hysteresis is monitored in this study using a continuous slope area (CSA) method, which uses Manning's equation to calculate unsteady discharges based on continuously measured water surfac

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11

Gupta, S. K., and V. K. Dwivedi. "Experimental Evaluation of Hydraulic Jump Characteristics in Gradually Expanding Sloping Channel." Journal of Applied Fluid Mechanics 18, no. 7 (2025): 1843–60. https://doi.org/10.47176/jafm.18.7.3228.

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Understanding hydraulic jumps in gradually expanding sloping channels is crucial for designing eco-friendly water management systems that minimize environmental impacts. This study seeks to investigate how the expansion ratio and channel slope together influence the characteristics of hydraulic jumps. The experiments were performed on four different channel slopes (00, 20, 40, and 60) and four distinct expansion ratios (B = b1/b2) of 0.35, 0.45, 0.55 and 0.75. The Reynolds number was ranged from 7150 to 27750, while the Froude number varied between 2.5 and 8.5 during the experiments. Novel cor

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12

Sougnez, N., and V. Vanacker. "Spatial variability in channel and slope morphology within the Ardennes Massif, and its link with tectonics." Hydrology and Earth System Sciences Discussions 7, no. 5 (2010): 6981–7006. http://dx.doi.org/10.5194/hessd-7-6981-2010.

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Abstract. Geomorphic processes that produce and transport sediment, and incise river valleys are complex; and often difficult to quantify over longer timescales of 103 to 105 years. Morphometric indices that describe the topography of hill slopes, valleys and river channels have commonly been used to compare morphological characteristics between catchments and to relate them to hydrological and erosion processes. This work focuses on a wide range of slope and river channel morphometric indices to study their behavior and strength in regions affected by low to moderate tectonic activity. We sel

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13

Liu, Da, Jianglin Gao, Fang Chen, Songtao Hu, Xiaohua Zhao, and Yan Li. "Analysis of Mechanical Properties and Slope Stability of Red Bed Soft Rock: A Case Study in Xinjiang Irrigation Diversion Channel." Advances in Civil Engineering 2022 (November 16, 2022): 1–9. http://dx.doi.org/10.1155/2022/9453702.

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The channel slope in the red-bed soft rock area is prone to instability and collapse due to the influence of the channel flow movement, rainfall, weathering, and other factors. Under long-term operation conditions, the sediment stripped from the channel side wall is liable to silt along the process of water flow transportation in the channel, which seriously leads to elevation of the channel bottom, increase of channel width, and reduction of the horseway, which affect the normal water conveyance and operation safety of channels. In view of the collapse and instability of Zhetang diversion irr

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14

Turowski, Jens Martin. "Alluvial cover controlling the width, slope and sinuosity of bedrock channels." Earth Surface Dynamics 6, no. 1 (2018): 29–48. http://dx.doi.org/10.5194/esurf-6-29-2018.

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Abstract. Bedrock channel slope and width are important parameters for setting bedload transport capacity and for stream-profile inversion to obtain tectonics information. Channel width and slope development are closely related to the problem of bedrock channel sinuosity. It is therefore likely that observations on bedrock channel meandering yields insights into the development of channel width and slope. Active meandering occurs when the bedrock channel walls are eroded, which also drives channel widening. Further, for a given drop in elevation, the more sinuous a channel is, the lower is its

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15

A.Merry, Marwa. "EXPERIMENTAL STUDY FOR DETERMINE MANNING'S COEFFICIENT WITH DIFFERENT SLOPES AND CHANNEL BED MATERIALS." Kufa Journal of Engineering 8, no. 3 (2017): 76–88. http://dx.doi.org/10.30572/2018/kje/8031160.

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Water resources and hydraulic engineering projects have been upward rapidly in all over the world, accordingly the prediction of roughness coefficient is essential criteria to design open channels, and related hydraulic structures. The aims of this research are to find out the effect of changing beds materials and discharge on coefficient of roughness (n), the beds that used in the tests are smooth which represented by original channel bed (steel plate), rough bed material which is a gravel bed and waved bed .The experimental work was performed in a rectangular flume with dimension of (15 m* 0

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16

Sougnez, N., and V. Vanacker. "The topographic signature of Quaternary tectonic uplift in the Ardennes massif (Western Europe)." Hydrology and Earth System Sciences 15, no. 4 (2011): 1095–107. http://dx.doi.org/10.5194/hess-15-1095-2011.

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Abstract. Geomorphic processes that produce and transport sediment, and incise river valleys are complex; and often difficult to quantify over longer timescales of 103 to 105 y. Morphometric indices that describe the topography of hill slopes, valleys and river channels have commonly been used to compare morphological characteristics between catchments and to relate them to hydrological and erosion processes. This study aims to analyze the link between tectonic uplift rates and landscape morphology based on slope and channel morphometric indexes. To achieve this objective, we selected 10 catch

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17

Sun, Hui, Bo Hu, and Guo Qiang Zhang. "Analysis of Fissured Expansive Soil Slope Stability and its Reinforcement with Anti-Slippery Piles." Applied Mechanics and Materials 275-277 (January 2013): 1489–92. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.1489.

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Fissure is one of the most important characteristics in expansive soil. It’s an important factor affecting slope stability in the expansive soil area. With the study of expansive soils typical channel slope fissured characters in the South-to-North Water Diversion Project, different impaction on slope stability such as location and inclination of the fissure are analyzed. By using the limit equilibrium method, the stability of expansive soil slope is analyzed; the most adverse condition of expansive soil slope is concluded. Then anti-slippery pile reinforcement in expansive soil channel slope

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18

K, Olafiranye, Opeloye S A, Amigun J O, and Adeoye O M. "Application Of Enhanced Seismic Semblance Attribute To The Characterisation Of Elements Of Deepwater Upper Slope Channels, Offshore Western Niger Delta." Global Journal of Geological Sciences 22, no. 1 (2024): 47–55. http://dx.doi.org/10.4314/gjgs.v22i1.4.

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Deepwater depositional elements are the building blocks of submarine systems and represent the basic mappable elements in seismic volumes. This study utilizes good quality 3-D seismic data of 300 km2 areal coverage in water depth of 500 m to characterise the planform morphology and distribution of channel elements in the upper slope of deepwater western, Niger Delta. The seismic interval of interest (between 500 and 1650 milliseconds two-way time (TWT), informally termed ‘Channel System’, was subdivided into six (6) seismic units - Intra Channels (IC) 1, 2, 3, 4, top channel system (TCS), and

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19

Guo, Xudong, Dongyu Lu, Xuelin Li, et al. "Geomorphological Characteristics and Evolutionary Process of a Typical Isolated Carbonate Platform Slope in the Xisha Sea: A Case Study of the Northwestern Dongdao Platform." Water 17, no. 9 (2025): 1259. https://doi.org/10.3390/w17091259.

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The northwestern slope of the Dongdao Platform in the Xisha Sea exhibits a complex geomorphological structure. Utilizing high-resolution multibeam bathymetric data and 2D seismic profiles, this study systematically reconstructs the slope morphology and its evolutionary processes. The study area displays a distinct threefold zonation: the upper slope (160–700 m water depth) has a steep gradient of 15°–25°, characterized by deeply incised V-shaped channels and slump deposits, primarily shaped by gravity-driven erosion; the middle slope (700–1200 m water depth) features a gentler gradient of 10°–

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20

El Bouanani, Latifa, Khadija Baba, Ghizlane Ardouz, and Fatimaezzahraa Latifi. "APPLICATION OF CONCRETE LOZENGES CHANNELS IN SLOPE EROSION PROTECTION." Journal of Southwest Jiaotong University 57, no. 4 (2022): 262–71. http://dx.doi.org/10.35741/issn.0258-2724.57.4.23.

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Water erosion is a phenomenon that threatens not only agricultural land but also road and rail infrastructure. This article investigates the slope stability against water erosion for five embankments situated on the north axis and east axes of the Moroccan linear railroad infrastructure and proposes the use of concrete lozenges channels for slope erosion protection. Using RUSLE erosion model, the assessment of the sensitivity of these infrastructures to water erosion has enabled us to deduct the essential role of water, the type of soil and the slope inclination in triggering instabilities. Th

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21

Arnold, D. J., Y. M. Stokes, and J. E. F. Green. "Thin-film flow in helically-wound rectangular channels of arbitrary torsion and curvature." Journal of Fluid Mechanics 764 (December 23, 2014): 76–94. http://dx.doi.org/10.1017/jfm.2014.703.

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AbstractLaminar helically-symmetric gravity-driven thin-film flow down a helically-wound channel of rectangular cross-section is considered. We extend the work of Stokes et al. (Phys. Fluids, vol. 25 (8), 2013, 083103) and Lee et al. (Phys. Fluids, vol. 26 (4), 2014, 043302) to channels with arbitrary curvature and torsion or, equivalently, arbitrary curvature and slope. We use a non-orthogonal coordinate system and, remarkably, find an exact steady-state solution. We find that the free-surface shape and flow have a complicated dependence on the curvature, slope and flux down the channel. Mode

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22

Baljyan, Pargev, Arestak Sarukhanyan, Hrachya Karapetyan, and Hovhannes Kelejyan. "Forecast of Stabilized Channel Transformations in Prismatic River Channels." International Journal of Religion 5, no. 11 (2024): 3951–58. http://dx.doi.org/10.61707/fg84c375.

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The perfection of nature in its simplicity and harmony. It is revealed in the process of her cognition. A striking example of harmony is the relationship between a river flow and its bed. In one area the stream begins to wash away the river bed, in another the washed away soil is deposited. In both cases, over time, the processes practically die out and a long-term equilibrium is restored. The work considers the problem of predicting river bed transformations at the stage of their stabilization. The goal is to determine the slope of the transformed bed, which has a prismatic shape. It is noted

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23

Alibekov, A. K., and G. A. Аlibekov. "MODELS FOR DETERMINING MAXIMUM DEGREE FILLING CHANNELS OF CIRCULAR SECTION SHAPE." Herald of Dagestan State Technical University. Technical Sciences 46, no. 2 (2019): 28–36. http://dx.doi.org/10.21822/2073-6185-2019-46-2-28-36.

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Objectives The task was to obtain a model for determining the maximum possible degree of filling the circular section channels in the earthen channel based on the condition of ensuring the stability of slopes and the minimum volume of excavation during their construction, as well as finding the optimum degree of filling fortified channels of a closed profile corresponding to maximum throughput.Method In work analytical methods of differential calculus and the solution of implicit equations are used.Result The experience of domestic and foreign researchers was taken into account to solve the se

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24

Jiongxin, Xu. "Channel pattern discrimination based on the relationship between channel slope and width." Zeitschrift für Geomorphologie 48, no. 3 (2004): 391–401. http://dx.doi.org/10.1127/zfg/48/2004/391.

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GOLDING, MADELEINE J., and HERBERT E. HUPPERT. "The effect of confining impermeable boundaries on gravity currents in a porous medium." Journal of Fluid Mechanics 649 (April 13, 2010): 1–17. http://dx.doi.org/10.1017/s0022112009993223.

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The effect of confining boundaries on gravity currents in porous media is investigated theoretically and experimentally. Similarity solutions are derived for currents when the volume increases as tα in horizontal channels of uniform cross-section with boundary height b satisfying b ~ a|y/a|n, where y is the cross-channel coordinate and a is a length scale of the channel width. Experiments were carried out in V-shaped and semicircular channels for the case of gravity currents with constant volume (α=0) and constant flux (α=1). These showed generally good agreement with the theory.Typically, we

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Okechukwu, Ozueigbo. "Three New Approaches to Estimating Energy Losses in Stepped Spillways with the Channel Slope of 8.9\(^o\)." Journal of Engineering Research and Reports 27, no. 3 (2025): 173–85. https://doi.org/10.9734/jerr/2025/v27i31426.

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A stepped spillway is a hydraulic structure built at storage and detention dams to discharge flood water that cannot be safely kept in the reservoir. It was created to minimize the kinetic energy that would have produced dangerous scour at the natural river bed beneath the spillway. It discharges this energy in floodwater using their stepping nature. Several studies in the literature show the detrimental consequences of falling water's kinetic energy on the river bed underneath the structure. Only a handful of these studies, however, have evaluated the impact of energy losses caused by stepped

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27

Mendonça, Vinícius V. O., César A. da Silva, Claudia R. O. S. G. Mendonça, Cícero J. da Silva, and Claudinei M. Guimarães. "Lettuce production in hydroponic and fish-farming aquaponic under different channel slopes and nutrient solutions in the NFT system." Revista Brasileira de Engenharia Agrícola e Ambiental 27, no. 9 (2023): 746–54. http://dx.doi.org/10.1590/1807-1929/agriambi.v27n9p746-754.

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ABSTRACT The slope of cultivation channels and types of nutrient solutions in hydroponics and aquaponics influence nutrient absorption and plant production. This research aimed to evaluate lettuce production under different channel slopes and nutrient solutions in hydroponic and aquaponic systems using the nutrient film technique (NFT). A randomized block design was used, with three replicates, in a 3 × 5 split-plot scheme, with three nutrient solutions (conventional hydroponic solution and two wastewaters from the tilapia fish diets, with 15 and 18% of crude protein) and five slopes (2, 4, 6,

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Z. Al-Sabea, Saja, and Ali N. Hilo. "The effect of lateral intake slope on sedimentation transport." Wasit Journal of Engineering Sciences 12, no. 3 (2024): 152–64. http://dx.doi.org/10.31185/ejuow.vol12.iss3.561.

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Generally, The problem of sediments at the entrances to subsidiary channels is considered one of the most common problems for which water resources engineers seek to find appropriate solutions, as it causes significant damage to hydraulic installations, as the accumulation of these sediments in the canal rollers over time leads to the collapse of those channels, which results in many losses. In this study, a three-dimensional mathematical model was developed using the Ansys Fluent CFD program, and this model was matched with previous laboratory experiments, as this mathematical model showed cl

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Hansen, Bogi, Turið Poulsen, Karin Margretha Húsgarð Larsen, et al. "Atlantic water flow through the Faroese Channels." Ocean Science 13, no. 6 (2017): 873–88. http://dx.doi.org/10.5194/os-13-873-2017.

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Abstract. Through the Faroese Channels – the collective name for a system of channels linking the Faroe–Shetland Channel, Wyville Thomson Basin, and Faroe Bank Channel – there is a deep flow of cold waters from Arctic regions that exit the system as overflow through the Faroe Bank Channel and across the Wyville Thomson Ridge. The upper layers, in contrast, are dominated by warm, saline water masses from the southwest, termed Atlantic water. In spite of intensive research over more than a century, there are still open questions on the passage of these waters through the system with conflicting

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Chitrakar, Suman, Scott N. Miller, Edward W. Kempema, Paul A. Caffrey, and Justin Stern. "Impact of Channel Slope on Cutthroat Flume Performance." Transactions of the ASABE 61, no. 1 (2018): 117–20. http://dx.doi.org/10.13031/trans.12468.

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Abstract. Cutthroat flumes are widely used in field projects to estimate discharge via a stage-discharge relationship. Flumes are commonly tested and calibrated in a laboratory to develop the stage-discharge relationship, but field installations often occur under non-idealized conditions, specifically with respect to bed slope. We calibrated a cutthroat flume with dimensions of 0.91 m length and 0.35 m throat width for bed slopes ranging from 0% to 2% to represent a range of field conditions. The experiment was conducted in the Water Resources Lab of the College of Engineering at the Universit

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Faug, Thierry, Mohamed Naaim, and Florence Naaim-Bouvet. "Experimental and numerical study of granular flow and fence interaction." Annals of Glaciology 38 (2004): 135–38. http://dx.doi.org/10.3189/172756404781814870.

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AbstractDense snow avalanches are regarded as dry granular flows. This paper presents experimental and numerical modelling of deposition processes occurring when a gravity-driven granular flow meets a fence. A specific experimental device was set up, and a numerical model based on shallow-water theory and including a deposition model was used. Both tools were used to quantify how the retained volume upstream of the fence is influenced by the channel inclination and the obstacle height. We identified two regimes depending on the slope angle. In the slope-angle range where a steady flow is possi

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Mohd Yusof, Muhammad Azizol, Suraya Sharil, and Wan Hanna Melini Wan Mohtar. "THE HYDRODYNAMIC CHARACTERISTICS FOR VEGETATIVE CHANNEL WITH GRAVEL BED DUNES." Jurnal Teknologi 84, no. 2 (2022): 93–102. http://dx.doi.org/10.11113/jurnalteknologi.v84.17045.

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Aquatic plants are known to provide flow resistance and impact the turbulence intensity and turbulent kinetic energy within the vegetated area. This paper further investigates the impact of both vegetation and dunes in open channels to the hydrodynamic characteristic of flow. Emergent vegetations were built from rigid wooden rod in staggered arrangement with 0.5% vegetations density were applied in the flume. Experiments were conducted with flow rate of 0.0058 m3/s throughout the experiments. Dunes were constructed from gravel of 2 mm size diameter in the shape of standing waves of three diffe

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Mua, Kang Edwin, and Kometa Sunday Shende. "The Response of Stream Competence to Topographic and Seasonal Variations in The Bamenda-Menchum Drainage Basin, North West Region, Cameroon." Journal of Geography and Geology 11, no. 2 (2019): 21. http://dx.doi.org/10.5539/jgg.v11n2p21.

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The flow direction of streams remains an establishing mechanism in understanding drainage basin function and stream competence. The ability of streams to erode, transport and deposit loads in fluvial geomorphology exert a benchmark precursor for slope dynamics given the differential geological outcrop of the Bamenda-Menchum basin. Such competence in stream network generates slope instability as materials continuously move down slope from the volcanic escarpment face of Bamenda highlands to the sedimentary lowland area of Lower Bafut-Menchum basin. This paper investigate the influence of stream

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Sulistyono, Bambang Agus, and Suryo Widodo. "Preissmann Four-Point Methods for Solution of Simplified Saint-Venant Equations Applied to Flood Routing in Prismatic Open Channels." Science and Technology Indonesia 9, no. 1 (2024): 183–88. http://dx.doi.org/10.26554/sti.2024.9.1.183-188.

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This research goal to compare the flow properties in the rectangular and trapezoidal open channels by examining the influence of the channel side slope is depicted by simplified Saint Venant Equations. The solution of these equations has been completed numerically by using Preissmann four-point scheme. The model is simulated using the Matlab application to point out the flow properties. The proposed model is validated by the model without simplification which was selected from the literature. The validation outcomes indicate that in common, the simulation outcomes of the two models have a good

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Gao, Zhenran, Weijing Li, Yan Zhu, et al. "Wireless Channel Propagation Characteristics and Modeling Research in Rice Field Sensor Networks." Sensors 18, no. 9 (2018): 3116. http://dx.doi.org/10.3390/s18093116.

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Wireless channel propagation characteristics and models are important to ensure the communication quality of wireless sensor networks in agriculture. Wireless channel attenuation experiments were carried out at different node antenna heights (0.8 m, 1.2 m, 1.6 m, and 2.0 m) in the tillering, jointing, and grain filling stages of rice fields. We studied the path loss variation trends at different transmission distances and analyzed the differences between estimated values and measured values of path loss in a free space model and a two-ray model. Regression analysis of measured path loss values

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Zhang, Yu, Fei Yu, Shan Xiong Chen, Xiao Jie Chu, and Zhang Jun Dai. "A Study on the Settlement Character of High Fill Channels." Applied Mechanics and Materials 513-517 (February 2014): 2639–42. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.2639.

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The settlement of high fill channels has great influence on the structural stability of the impervious panels in the North Water Diversion Project. For the high fill channels, the settlement study on the filling body and water channel slope of the channels after the completion of the filling is systematically carried out. The study result shows that the post-settlement development law of the channels accord with the hyperbolic, the settlement of the slope is uneven, and the deformation and the deformation rate of the slope is mainly controlled by vertical settling.

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Chikwue, M. I., P. Ezedozie, C. D. Njoku, and D. James. "COMPARATIVE EVALUATION OF HYDROLOGICAL STORM WATER DRAINS IN FUTO USING GLOBAL MAPPER 15.0 SOFTWARE." Journal of Agricultural Mechanization 1 (November 30, 2021): 98–104. https://doi.org/10.5281/zenodo.13207674.

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Insufficient and inaccurate hydrological analysis of storm water drains can cause adverse effectssuch as flooding. This research evaluated and compares hydrological storm water drains at theFederal University of Technology, Owerri to ascertain their adequacy and accuracy using GlobalMapper 15.0 software. The Topographical-cadastral survey was carried out for the study areahaving maximum and minimum elevation of 67 and 44m respectively, and a mean terrain slope of1.3%. Shuttle Radar Topography Mission data of the study area were downloaded using GPScoordinates of the study area and the Digital

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Edwards, Chris, Sean McQuaid, Stewart Easton, et al. "Lateral accretion in a straight slope channel system: an example from the Forties Sandstone of the Huntington Field, UK Central North Sea." Geological Society, London, Petroleum Geology Conference series 8, no. 1 (2017): 413–28. http://dx.doi.org/10.1144/pgc8.33.

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AbstractA rich dataset of core, well logs and 3D seismic data has been integrated to establish a depositional hierarchy of a Paleocene-aged, Forties slope channel system of the Huntington Field, Block 22/14b of the Central North Sea. The reservoir consists of a mix of high-concentration turbidites and muddy and sandy debrites deposited as a series of laterally offset, slope channel fills. Seismic data reveal that the channels were remarkably straight and devoid of meander bends, more commonly associated with sinuous slope channel networks. Paradoxically, the internal offlapping architecture dr

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Zhang, Li, Tiejian Li, Guangqian Wang, et al. "How canyons evolve by incision into bedrock: Rainbow Canyon, Death Valley National Park, United States." Proceedings of the National Academy of Sciences 117, no. 26 (2020): 14730–37. http://dx.doi.org/10.1073/pnas.1911040117.

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Incising rivers may be confined by low-slope, erodible hillslopes or steep, resistant sidewalls. In the latter case, the system forms a canyon. We present a morphodynamic model that includes the essential elements of a canyon incising into a plateau, including 1) abrasion-driven channel incision, 2) migration of a canyon-head knickpoint, 3) sediment feed from an alluvial channel upstream of the knickpoint, and 4) production of sediment by sidewall collapse. We calculate incision in terms of collision of clasts with the bed. We calculate knickpoint migration using a moving-boundary formulation

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Wallert, M. A., M. J. Ackerman, D. Kim, and D. E. Clapham. "Two novel cardiac atrial K+ channels, IK.AA and IK.PC." Journal of General Physiology 98, no. 5 (1991): 921–39. http://dx.doi.org/10.1085/jgp.98.5.921.

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Two K(+)-selective channels in neonatal rat atrial cells activated by lipophilic compounds have been characterized in detail. The arachidonic acid-stimulated channel (IK.AA) had a slope conductance of 124 +/- 17 pS at +30 mV in symmetrical 140 mM potassium and a mean open time of approximately 1 ms, and was relatively voltage independent. IK.AA activity was reversibly increased by lowering pH to 6.0. Arachidonic acid was most effective in activating this channel, although a number of lipophilic compounds resulted in activation. Surprisingly, choline, a polar molecule, also activated the channe

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Fayziev, Kh, T. K. Khojiyev, Sh A. Rakhimov, K. T. Zhuraev, and M. B. Khalikov. "Ensuring the Stability of Channel Linings Under Unsteady Filtration." International Journal of Membrane Science and Technology 10, no. 2 (2023): 4026–36. http://dx.doi.org/10.15379/ijmst.v10i2.3301.

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When assessing the stability of the slopes of the banks of reservoirs and channels, the filtration regime that occurs with a rapid decrease in the water level in the upstream, which is due to the nature of the operation of structures before floods, discharges, emergency situations, is of particular interest. A change in the water levels in the upstream causes a change in the position of the depression surface and the parameters of the filtration flow (pressure gradients, filtration rates and flow rates) in the coastal massif. At the same time, unsteady filtration occurs in the coastal massif a

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Hu, Qingfeng, Yingchao Kou, Jinping Liu, et al. "TerraSAR-X and GNSS Data for Deformation Detection and Mechanism Analysis of a Deep Excavation Channel Section of the China South–North Water-Diversion Project." Remote Sensing 15, no. 15 (2023): 3777. http://dx.doi.org/10.3390/rs15153777.

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Due to expansive soils and high slopes, the deep excavated channel section of the China South–North Water-Diversion Middle-Route Project has a certain risk of landslide disaster. Therefore, examining the deformation law and mechanism of the channel slope in the middle-route section of the project is an extreme necessity for safe operation. However, the outdated monitoring method limits research on the surface deformation law and mechanism of the entire deep excavation channel section. For these reasons, we introduced a novel approach that combines SBAS-InSAR and GNSS, enabling the surface doma

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Barnes, S., and B. Hille. "Veratridine modifies open sodium channels." Journal of General Physiology 91, no. 3 (1988): 421–43. http://dx.doi.org/10.1085/jgp.91.3.421.

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The state dependence of Na channel modification by the alkaloid neurotoxin veratridine was investigated with single-channel and whole-cell voltage-clamp recording in neuroblastoma cells. Several tests of whole-cell Na current behavior in the presence of veratridine supported the hypothesis that Na channels must be open in order to undergo modification by the neurotoxin. Modification was use dependent and required depolarizing pulses, the voltage dependence of production of modified channels was similar to that of normal current activation, and prepulses that caused inactivation of normal curre

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Setiyadi, Setiyadi. "PEMROGRAMAN SLOPE MINIMUM DAN KONSENTRASI SEDIMEN MAKSIMUM SEBAGAI ALTERNATIF PENDIMENSIAN SALURAN." Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH 1, no. 1 (2020): 54–65. http://dx.doi.org/10.33541/cen.v1i1.1431.

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ABSTRACT Design of dimension channel can use Minimum Slope and Maximum Concentration Sediment method. Minimum Slope is slope of channel, where is condition it the energy of flow is minimum, so channel condition is stabile. Maximum Sediment Concentration is method of sediment transport capacity, resistant and optimum it. Two methods are to produce of the same dimension of channel.

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Jarosch, A. H., and M. T. Gudmundsson. "A numerical model for meltwater channel evolution in glaciers." Cryosphere Discussions 5, no. 5 (2011): 2605–28. http://dx.doi.org/10.5194/tcd-5-2605-2011.

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Abstract. Meltwater channels form an integral part of the hydrological system of a glacier. Better understanding of how meltwater channels develop and evolve is required to fully comprehend supraglacial and englacial meltwater drainage. Incision of supraglacial stream channels and subsequent roof closure by ice deformation has been proposed in recent literature as a possible englacial conduit formation process. Field evidence for supraglacial stream incision has been found in Svalbard and Nepal. In Iceland, where volcanic activity provides meltwater with temperatures above 0 °C, rapid enlargem

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Tofelde, Stefanie, Sara Savi, Andrew D. Wickert, Aaron Bufe, and Taylor F. Schildgen. "Alluvial channel response to environmental perturbations: fill-terrace formation and sediment-signal disruption." Earth Surface Dynamics 7, no. 2 (2019): 609–31. http://dx.doi.org/10.5194/esurf-7-609-2019.

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Abstract. The sensitivity of fluvial systems to tectonic and climatic boundary conditions allows us to use the geomorphic and stratigraphic records as quantitative archives of past climatic and tectonic conditions. Thus, fluvial terraces that form on alluvial fans and floodplains as well as the rate of sediment export to oceanic and continental basins are commonly used to reconstruct paleoenvironments. However, we currently lack a systematic and quantitative understanding of the transient evolution of fluvial systems and their associated sediment storage and release in response to changes in b

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Kosaj, Rasool, Rafid S. Alboresha, and Sadeq O. Sulaiman. "Comparison Between Numerical Flow3d Software and Laboratory Data, For Sediment Incipient Motion." IOP Conference Series: Earth and Environmental Science 961, no. 1 (2022): 012031. http://dx.doi.org/10.1088/1755-1315/961/1/012031.

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Abstract In this paper, the laboratory data were compared with computational fluid dynamics (CFD) Flow3D for predicting the beginning of sediment incipient motion in rigid boundary channel for two types of sands, irrigation, and sewer types, in rectangular flume (0.5*0.5)m cross-section. Tests were made for soil samples with different diameters, specific weights. The testing was performed in slopes ranging from 0.001-0.003 for irrigation types and 0.0025-0.025 for sewer types depending on the original parameter. The Flow-3D software has simulated the laboratory work using scouring models MPM a

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Zhu, Yi, Jianqi Zhuang, and Yong Zhao. "Failure Process of High-Loess-Filled-Slopes (HLFSs) during Precipitation under Different Mitigation Measures." Applied Sciences 14, no. 1 (2024): 419. http://dx.doi.org/10.3390/app14010419.

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The problems of gully and soil erosion caused by large-scale urban construction and agricultural development in China have become more and more serious in recent years. In an effort to solve this problem, a series of gully stabilization and highland protection projects have been carried out on the Loess Plateau, and this has resulted in a large number of high-loess-filled-slopes (HLFSs). Although these filled slopes uses several different mitigation measures, the HLFSs have been eroded and destroyed under the action of water. In order to study the influence of different mitigation measures on

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Yang, Tan Shu, Yang Qu Tan, and Cui Juan Luo. "Application of Pine Piles for Strengthening High Slope Channel Retaining Walls on Soft Soil Subgrade." Applied Mechanics and Materials 438-439 (October 2013): 1190–94. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.1190.

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In the modification of narrow deep soil channels of early urban excavation, because of great depth and steep slope, the gravity retaining wall slope will be needed. The problems of soft soil subgrade treatment at channel bottom have to be solved. Combined with the old channel treatment project of a city, as practical example, the method by which the soft subgrade of channel retaining walls strengthening with pine piles, is described. By application of Coulomb Theory, the stability calculation for gravity pitch-up oblique retaining walls is conducted. The results show that using pine piles is a

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Mei, Han, Hu Xiewen, and Hu Kai. "Comparative study between debris flow of wide-gentle and narrow-steep channel based on numerical simulation and prevention measures." Journal of Nepal Geological Society 55, no. 1 (2018): 167–72. http://dx.doi.org/10.3126/jngs.v55i1.22808.

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Along the Duwen freeway in the Wenchuan earthquake area, there are two main types of debris flow channels, that is, wide-gentle channel and narrow-steep channel. The wide-gentle channel has the feature of gentle longitudinal slope, large mean width and catchment area. Whereas the narrow-steep one generally shows opposite features with narrow longitudinal slope, small mean width and catchment area. During the heavy rainfall, these channels are subject to large-scale debris flows due to huge amount of earthquake-induced collapsing and sliding materials. With field investigation on the form

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