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Journal articles on the topic 'Hydraulisk modell'

Author: Grafiati

Published: 30 June 2021

Last updated: 29 July 2025

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1

Christoffersen, Bradley O., Manuel Gloor, Sophie Fauset, et al. "Linking hydraulic traits to tropical forest function in a size-structured and trait-driven model (TFS v.1-Hydro)." Geoscientific Model Development 9, no. 11 (2016): 4227–55. http://dx.doi.org/10.5194/gmd-9-4227-2016.

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Abstract. Forest ecosystem models based on heuristic water stress functions poorly predict tropical forest response to drought partly because they do not capture the diversity of hydraulic traits (including variation in tree size) observed in tropical forests. We developed a continuous porous media approach to modeling plant hydraulics in which all parameters of the constitutive equations are biologically interpretable and measurable plant hydraulic traits (e.g., turgor loss point πtlp, bulk elastic modulus ε, hydraulic capacitance Cft, xylem hydraulic conductivity ks,max, water potential at 5

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2

Belenkov, Yu A., A. V. Lepeshkin, V. E. Suzdaltsev, and I. V. Fateev. "Computer models of laboratory works for Hydraulics, hydromachines and hydraulic transmissions for distance learning system." Izvestiya MGTU MAMI 4, no. 2 (2010): 252–58. http://dx.doi.org/10.17816/2074-0530-69807.

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The paper suggest the methodology of virtual laboratory works for Hydraulics, hydromachines and hydraulic transmissions. Similar laboratory systems are needed for further progress of distance learning system in Russian Federation.

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3

Guo, Xiao Le, Zhi Ming Wang, and Zhi Hui Long. "Hydraulics Analysis System for Extended Reach Drilling in China and its Application." Applied Mechanics and Materials 241-244 (December 2012): 1349–53. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.1349.

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The extended reach drilling (ERD) is being adopted widely as an effective and economical way of developing oilfields in China. But it also brought a series of technical difficulties because of its own characteristics. Some progresses were made after several years of hard work in China about Hydraulics for extended reach drilling, which included cuttings transport models and rules, precise model of circulating system pressure loss calculation, hole cleaning calculating models and monitoring method, hydraulic extended limit calculation model and analysis, hydraulics design and optimization metho

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Vanderborght, Jan, Valentin Couvreur, Felicien Meunier, et al. "From hydraulic root architecture models to macroscopic representations of root hydraulics in soil water flow and land surface models." Hydrology and Earth System Sciences 25, no. 9 (2021): 4835–60. http://dx.doi.org/10.5194/hess-25-4835-2021.

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Abstract. Root water uptake is an important process in the terrestrial water cycle. How this process depends on soil water content, root distributions, and root properties is a soil–root hydraulic problem. We compare different approaches to implement root hydraulics in macroscopic soil water flow and land surface models. By upscaling a three-dimensional hydraulic root architecture model, we derived an exact macroscopic root hydraulic model. The macroscopic model uses the following three characteristics: the root system conductance, Krs, the standard uptake fraction, SUF, which represents the u

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5

Guo, Xiao Le, Zhi Ming Wang, and Zhi Hui Long. "Research Progresses of Hydraulics for Extended Reach Drilling in China, Part I: Cuttings Transport and Precise Calculation of Pressure Loss." Advanced Materials Research 524-527 (May 2012): 1557–60. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.1557.

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The extended reach drilling (ERD) is being adopted widely as an effective and economical way of developing oilfields in China. But it also brought a series of technical difficulties because of its own characteristics. Some progresses were made after several years of hard work in China about Hydraulics for extended reach drilling, which included cuttings transport models and rules, precise model of circulating system pressure loss calculation, hole cleaning calculating models and monitoring method, hydraulic extended limit calculation model and analysis, hydraulics design and optimization metho

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6

Wang, Yujie, and Christian Frankenberg. "Technical note: Common ambiguities in plant hydraulics." Biogeosciences 19, no. 19 (2022): 4705–14. http://dx.doi.org/10.5194/bg-19-4705-2022.

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Abstract. Plant hydraulics gains increasing interest in plant ecophysiology and vegetation modeling. However, the hydraulic properties and profiles are often improperly represented, thus leading to biased results and simulations, e.g., the neglection of gravitational pressure drop results in overestimated water flux. We highlight the commonly seen ambiguities and/or misunderstandings in plant hydraulics, including (1) the distinction between water potential and pressure, (2) differences among hydraulic conductance and conductivity, (3) xylem vulnerability curve formulations, (4) model complexi

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Ostendorf, David W., Don J. DeGroot, Wayne M. Shelburne, and Travis J. Mitchell. "Hydraulic head in a clayey sand till over multiple timescales." Canadian Geotechnical Journal 41, no. 1 (2004): 89–105. http://dx.doi.org/10.1139/t03-074.

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This paper presents an analysis of hydraulic head data measured every 2 h for 2 years in the leading edge of a drumlin that consists of weathered, brown clayey sand till and underlying unweathered gray clayey sand till. The brown till responds as an unconfined aquifer and acts as a boundary condition for the confined gray till aquifer. Analytical models are presented for interpretation of the hydraulic head data using annual, monthly, and daily timescales, for estimation of drumlin (landform) hydraulics and till (formation) properties. The annual average head data from open-standpipe piezomete

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8

Ndomba, Preksedis M., and Joel Nobert. "Problems and Prospects of Hydraulic Modelling For Environmental Flows Assessment Studies in East Africa." Tanzania Journal of Engineering and Technology 34, no. 2 (2013): 67–83. http://dx.doi.org/10.52339/tjet.v34i2.460.

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The objective of this paper is to document the problems and prospects of hydraulic modelling for Environmental Flows Assessment (EFA) studies based on selected case studies. Most of studies in East Africa use Holistic methodologies. An ideal data set for defining river hydraulics for most of these methods would be six data points of stage measurements over a good distribution of discharges, the stage of zero discharge and some flood-related data. Besides, in East African region EFA studies suffer from data scarcity (i.e., poorly gauged sites) and limited expertise and funding. The hydraulics s

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9

Berardi, L., and O. Giustolisi. "Calibration of Design Models for Leakage Management of Water Distribution Networks." Water Resources Management 35, no. 8 (2021): 2537–51. http://dx.doi.org/10.1007/s11269-021-02847-x.

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AbstractWater losses in urban water distribution networks (WDN) accelerate the deterioration of such infrastructures. The enhanced hydraulic modelling provides a phenomenological representation of WDN hydraulics, including the modelling of leakages as function of pipe average pressure and deterioration. The methodological use of such models on real WDN was demonstrated to support the planning of leakage management actions. Nonetheless, many water utilities are still in the process of designing flow/pressure monitoring, thus data available are not enough to perform detailed calibration of such

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10

Sweeney, D. G., N. J. Cromar, J. B. Nixon, C. T. Ta, and H. J. Fallowfield. "The spatial significance of water quality indicators in waste stabilization ponds - limitations of residence time distribution analysis in predicting treatment efficiency." Water Science and Technology 48, no. 2 (2003): 211–18. http://dx.doi.org/10.2166/wst.2003.0123.

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Over the past fifty years, considerable research in waste stabilization pond operation has led to the development of a number of models used to describe the hydraulic regime and predict treatment efficiency. Models range in complexity from plug or completely mixed simplifications to computational fluid dynamics (CFD) models which are able to predict flow hydraulics at a local level. Information about the exit age of pond effluent can be used to estimate pollutant decay. However, a mechanistic approach to understanding pond operation highlights the importance of knowing both the time and spatia

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11

Marthews, T. R., C. A. Quesada, D. R. Galbraith, et al. "High-resolution hydraulic parameter maps for surface soils in tropical South America." Geoscientific Model Development 7, no. 3 (2014): 711–23. http://dx.doi.org/10.5194/gmd-7-711-2014.

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Abstract. Modern land surface model simulations capture soil profile water movement through the use of soil hydraulics sub-models, but good hydraulic parameterisations are often lacking, especially in the tropics. We present much-improved gridded data sets of hydraulic parameters for surface soil for the critical area of tropical South America, describing soil profile water movement across the region to 30 cm depth. Optimal hydraulic parameter values are given for the Brooks and Corey, Campbell, van Genuchten–Mualem and van Genuchten–Burdine soil hydraulic models, which are widely used hydraul

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Mursinna, A., Erica McCormick, Katie Van Horn, Lisa Sartin, and Ashley Matheny. "Plant Hydraulic Trait Covariation: A Global Meta-Analysis to Reduce Degrees of Freedom in Trait-Based Hydrologic Models." Forests 9, no. 8 (2018): 446. http://dx.doi.org/10.3390/f9080446.

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Current vegetation modeling strategies use broad categorizations of plants to estimate transpiration and biomass functions. A significant source of model error stems from vegetation categorizations that are mostly taxonomical with no basis in plant hydraulic strategy and response to changing environmental conditions. Here, we compile hydraulic traits from 355 species around the world to determine trait covariations in order to represent hydraulic strategies. Simple and stepwise regression analyses demonstrate the interconnectedness of multiple vegetative hydraulic traits, specifically, traits

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Marthews, T. R., C. A. Quesada, D. R. Galbraith, et al. "High-resolution hydraulic parameter maps for surface soils in tropical South America." Geoscientific Model Development Discussions 6, no. 4 (2013): 6741–74. http://dx.doi.org/10.5194/gmdd-6-6741-2013.

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Abstract. Modern land surface model simulations capture soil profile water movement through the use of soil hydraulics sub-models, but good hydraulic parameterisations are often lacking, especially in the tropics. We present much-improved gridded datasets of hydraulic parameters for surface soil for the critical area of tropical South America, describing soil profile water movement across the region to 30 cm depth. Optimal hydraulic parameter values are given for the Brooks and Corey, Campbell, van Genuchten–Mualem and van Genuchten–Burdine soil hydraulic models, which are widely-used hydrauli

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14

Carleton, Tyler J., and Steven R. Fassnacht. "Linking Hydrologic and Hydraulic Data with Models to Assess Flow and Channel Alteration at Hog Park, Wyoming USA." Hydrology 7, no. 2 (2020): 29. http://dx.doi.org/10.3390/hydrology7020029.

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Transbasin diversions and dams allow for water uses when and where there is high demand and low supply, but can come with an expense to the environment. This paper presents a linkage of hydrologic and hydraulic modeling and datasets to assess the hydrologic and hydraulic stability within a transbasin watershed as an approach for meeting water use targets and safeguarding environmental sustainability. The approach used a Prediction in Ungauged Basin (PUB) regionalization technique that completed the parameterization of a study watershed hydrologic model by transferring calibrated parameters fro

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15

Parekh, Siddharth, Ali Pilehvari, and Robert Serth. "Prediction of Fluid Behavior Using Generalized Hydraulic Calculation Method in Hydraulic Fractures." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 81, no. 1 (2021): 120–30. http://dx.doi.org/10.37934/arfmts.81.1.120130.

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Hydraulic fracturing has been used as one of the stimulation techniques to economically increase oil and gas production by creating small cracks in subsurface geologic formations to allow oil or gas to move toward a producing well. Hydraulics plays a vital role in many oil field operations including drilling, completion, fracturing and production. In the case of fracturing, however, the role of hydraulics becomes important since optimized hydraulics can minimize the cost and conversely, any miscalculations may cause problems such as the fluid loss or may potentially even lead to loss of the we

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16

Rajaratnam, N., C. Katopodis, and R. Paccagnan. "Field studies of fishways in Alberta." Canadian Journal of Civil Engineering 19, no. 4 (1992): 627–38. http://dx.doi.org/10.1139/l92-072.

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This paper presents a detailed account of field studies performed on one pool-weir and several Denil and vertical slot fishways in the province of Alberta. The pictures show the broad features of the flow. The velocity profiles obtained in the field studies have confirmed the measurements made in the laboratory on scale models and have enhanced the general picture, particularly for the vertical slot fishways. This paper provides hydraulic engineers with information for understanding the primary hydraulic characteristics of fishways. Key words: fishways, field studies, hydraulics, open-channel

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17

Perrin, O., S. Christophe, F. Jacquinod, and O. Payrastre. "VISUAL ANALYSIS OF INCONSISTENCIES IN HYDRAULIC SIMULATION DATA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B4-2020 (August 25, 2020): 795–801. http://dx.doi.org/10.5194/isprs-archives-xliii-b4-2020-795-2020.

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Abstract. We present our contribution to the geovisualization and visual analysis of hydraulic simulation data, based on an interdisciplinary research work undertaken by researchers in geographic information sciences and in hydraulics. The positive feedback loop between researchers favored the proposal of visualization tools enabling visual reasoning on hydraulic simulated data so as to infer knowledge on the simulation model. We interactively explore and design 2D multi-scale styles to render hydraulic simulated data, in order to support the identification over large simulation domains of pos

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18

Farmani, Mohammad A., Ali Behrangi, Aniket Gupta, Ahmad Tavakoly, Matthew Geheran, and Guo-Yue Niu. "Do land models miss key soil hydrological processes controlling soil moisture memory?" Hydrology and Earth System Sciences 29, no. 2 (2025): 547–66. https://doi.org/10.5194/hess-29-547-2025.

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Abstract. Soil moisture memory (SMM), which refers to how long a perturbation in soil moisture (SM) can last, is critical for understanding climatic, hydrological, and ecosystem interactions. Most land surface models (LSMs) tend to overestimate surface soil moisture and its persistency (or SMM), sustaining spuriously large soil surface evaporation during dry-down periods. We attempt to answer a question: do LSMs miss or misrepresent key hydrological processes controlling SMM? We use a version of Noah-MP with advanced hydrology that explicitly represents preferential flow and surface ponding an

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19

Baird, Drew, Benjamin Abban, S. Scurlock, Steven Abt, and Christopher Thornton. "Two-Dimensional Numerical Modeling of Flow in Physical Models of Rock Vane and Bendway Weir Configurations." Water 13, no. 4 (2021): 458. http://dx.doi.org/10.3390/w13040458.

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While there are a wide range of design recommendations for using rock vanes and bendway weirs as streambank protection measures, no comprehensive, standard approach is currently available for design engineers to evaluate their hydraulic performance before construction. This study investigates using 2D numerical modeling as an option for predicting the hydraulic performance of rock vane and bendway weir structure designs for streambank protection. We used the Sedimentation and River Hydraulics (SRH)-2D depth-averaged numerical model to simulate flows around rock vane and bendway weir installati

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20

Paternina-Verona, Duban A., Oscar E. Coronado-Hernández, Hector G. Espinoza-Román, Vicente S. Fuertes-Miquel, and Helena M. Ramos. "Different Experimental and Numerical Models to Analyse Emptying Processes in Pressurised Pipes with Trapped Air." Applied Sciences 13, no. 13 (2023): 7727. http://dx.doi.org/10.3390/app13137727.

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In hydraulic engineering, some researchers have developed different mathematical and numerical tools for a better understanding of the physical interaction between water flow in pipes with trapped air during emptying processes, where they have made contributions on the use of simple and complex models in different application cases. In this article, a comparative study of different experimental and numerical models existing in the literature for the analysis of trapped air in pressurised pipelines subjected to different scenarios of emptying processes is presented, where different authors have

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21

Sanchez-Quijano, Miguel Angel, Alfonso Gutierrez-Lopez, and Fernanda Gonzalez Lagunas. "Advancing Forensic Flood Analysis Through Hydraulic Physical Models." JURNAL TEKNIK HIDRAULIK 15, no. 2 (2024): 129–40. https://doi.org/10.32679/jth.v15i2.794.

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Urban density significantly increases the multi-hazard risks caused by extreme weather events. In Latin America and the Caribbean (LAC) countries, flood damages in urban areas are considerable and have shown a consistent annual increase. This challenge has prompted innovative educational responses to address the growing need for understanding and managing urban flood risks effectively. As part of postgraduate education efforts, the International Flood Initiative under the Intergovernmental Hydrological Programme of UNESCO for the LAC region (IFI-LAC IHP-UNESCO) aims to enhance understanding of

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22

Radosavljević, Milan, Radovan Petrović, Boris Žeželj, Duško Belović, and Stefan Cvejić. "Mathematical Modeling and Experimental Tests of Working Parameters of Piston-Radial Pumps in Hydraulic Systems of Mobile Machines." Applied Sciences 14, no. 21 (2024): 9979. http://dx.doi.org/10.3390/app14219979.

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Modern methods of designing and constructing hydraulic pumps can no longer be imagined without the use of appropriate mathematical models, phenomena and processes that take place in concrete constructions. A mathematical model of a process represents an analytical interpretation with certain assumptions. Obtaining a mathematical model requires detailed theoretical research, based on knowledge of the laws of fundamental sciences and scientific disciplines, in order to fully understand and interpret the process, upon which assumptions are adopted and model equations are defined. As mobile machin

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Matus, Sean A., Francina Dominguez, Daniel R. Gambill, and Heidi R. Howard. "Embracing Uncertainty: Using Probabilistic Weather Forecasts to Make Ensemble Hydraulic Predictions at Remote Low-Water Crossings." Journal of Hydrometeorology 21, no. 5 (2020): 953–69. http://dx.doi.org/10.1175/jhm-d-19-0238.1.

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AbstractLow-water crossings are structures designed to be overtopped during high river flows. These structures are usually constructed in remote locations, making timely emergency response difficult in case of flooding. In this work, five historical flooding events were hindcasted at a remote low-water crossing in central Texas. An ensemble of model-simulated precipitation forcing cascades uncertainty through hydrologic and hydraulic models. Each precipitation ensemble member corresponds to an independent model run, resulting in an ensemble 24-h streamflow forecast initialized at 0000 UTC. In

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Randle, Timothy J. "Use of Multidimensional Models to Investigate Boundary Shear Stress through Meandering River Channels." Water 12, no. 12 (2020): 3506. http://dx.doi.org/10.3390/w12123506.

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Three-dimensional hydraulics were simulated through a wide range of synthetically generated meandering river channels to determine how channel curvature and width would correlate with the maximum boundary shear stress. Multidimensional models were applied, similar to a computational flume to simulate a wide range of 72 meandering channels, developed from sine-generated curves. Cannel sinuosity ranged from 1.1 to 3.0 and included five consecutive meander bends. Longitudinal slopes of the various channels spanned four orders of magnitude, while bankfull discharges spanned three orders of magnitu

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25

Mischuk, Dmitry. "HYDRAULIC CYLINDER OF THE VOLUMETRIC HYDRAULIC DRIVE RESEARCH OF THE DYNAMIC MODEL." Gіrnichі, budіvelnі, dorozhnі ta melіorativnі mashini, no. 87 (July 8, 2016): 74–81. http://dx.doi.org/10.26884/damu.a168713.

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26

Marengo, Humberto, Álvaro A. Aldama, and Ignacio Romero. "Un nuevo criterio para la estimación de rugosidad compuesta en modelos hidráulicos." Tecnología y ciencias del agua 11, no. 5 (2020): 171–224. http://dx.doi.org/10.24850/j-tyca-2020-05-05.

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27

Zanata, Igor Martins, Vicente de Paulo Santos De Oliveira, and Wagner Rambaldi Telles. "The use of Computational Modeling for Simulation and Comparison of Digital Elevation Models in Northwest Fluminense. Case Study: Pomba River and Paraíba do Sul River." Revista de Gestão Social e Ambiental 18, no. 4 (2023): e04610. http://dx.doi.org/10.24857/rgsa.v18n4-001.

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Purpose: The work proposes the location, simulation and comparison of Digital Elevation Models (DEM) in a section where the Pomba River and the Paraíba do Sul River meet, located in the northwest of the state of Rio de Janeiro, a region known for the reproduction of some species of fish threatened with extinction.  Methods: Searches for DEMs in the region were carried out on a free website, where a total of 10 DEMs were found. Several hydraulic simulations were carried out using computer modeling software called Iber, to verify the veracity and coherence of the data available.&#x0D

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28

Agung, Prijo Budijono, Nyoman Sutantra I, and Sigit Pramono Agus. "Optimizing regenerative braking on electric vehicles using a model-based algorithm in the antilock braking system." International Journal of Power Electronics and Drive Systems 14, no. 01 (2023): 131~139. https://doi.org/10.11591/ijpeds.v14.i1.pp131-139.

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The regenerative braking effectiveness of electric vehicles (EVs), with 8-25% range, requires designers to produce better braking systems. The antilock braking system (ABS) was chosen because it offers various advantages, such as enhanced safety considerations, vehicle maneuverability, and so on. The measurement findings revealed that ABS took longer to stop the wheels with the same wheel rotation speed. Because of the lesser differentiation of magnetic flux to time, it created lower induced emf in the generator. ABS 50 Hz performance was 19.5% at 4500 pm, whereas hydraulic brake performance w

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Loi, Nguyen Kim, Nguyen Duy Liem, Le Hoang Tu, et al. "Automated procedure of real-time flood forecasting in Vu Gia – Thu Bon river basin, Vietnam by integrating SWAT and HEC-RAS models." Journal of Water and Climate Change 10, no. 3 (2018): 535–45. http://dx.doi.org/10.2166/wcc.2018.015.

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Abstract The precise and reliable simulation of hydrologic and hydraulic processes is important for efficient flood forecasting and warning. The study proposes a real-time flood forecasting system which integrates a coupled hydrological-hydraulic modeling system, weather station network, and stream gauges in a web-based visualization environment. An automated procedure was developed for linking dynamically terrestrial rainfall-runoff processes and river hydraulics by coupling the SWAT hydrological model and the HEC-RAS hydraulic model. The flood forecasting system was trialed in the Vu Gia – T

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Martins, Ricardo, Jorge Leandro, and Rita Fernandes de Carvalho. "Characterization of the hydraulic performance of a gully under drainage conditions." Water Science and Technology 69, no. 12 (2014): 2423–30. http://dx.doi.org/10.2166/wst.2014.168.

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During rainfall events with low return periods (1–20 years) the drainage system can provide some degree of protection to urban areas. The system design is based not only on good hydraulic performance of the surface and the sewer network but also on their linking elements. Although the linking elements are of utmost importance as they allow the exchange of flow between the surface and the sewer network, there is a lack of studies that thoroughly characterize them. One crucial structural part of those elements is the gully. State-of-the-art dual-drainage models often use simplified formulae to r

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Mohammed, Abdulrasheed, Salisu Dan’Azumi, Abubakar Ahmed Modibbo, and Abubakar Abbas Adamu. "DEVELOPMENT OF RAINFALL INTENSITY DURATION FREQUENCY (IDF) CURVES FOR DESIGN OF HYDRAULIC STRUCTURES IN KANO STATE, NIGERIA." Platform : A Journal of Engineering 5, no. 2 (2021): 10. http://dx.doi.org/10.61762/pajevol5iss2art12706.

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Rainfall intensity is an essential parameter in the design of any hydraulic structure. The IDF curves are used to design hydraulic structures such as culverts, bridges, roads, urban drainage systems, and many more. Colonial masters developed the first IDF curve for Kano State based on records of 1938 - 1944 (6 years) followed by Oyenbade (1982), and since then, it has not been reviewed or updated. As a result of changes in rainfall patterns that have taken place over time and the climate change, the Oyenbade IDF curves might no longer be suitable for hydraulics design in Kano State. Therefore,

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Avramova, M., A. Velazquez-Lozada, and A. Rubin. "Comparative Analysis of CTF and Trace Thermal-Hydraulic Codes Using OECD/NRC PSBT Benchmark Void Distribution Database." Science and Technology of Nuclear Installations 2013 (2013): 1–12. http://dx.doi.org/10.1155/2013/725687.

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The international OECD/NRC PSBT benchmark has been established to provide a test bed for assessing the capabilities of thermal-hydraulic codes and to encourage advancement in the analysis of fluid flow in rod bundles. The benchmark was based on one of the most valuable databases identified for the thermal-hydraulics modeling developed by NUPEC, Japan. The database includes void fraction and departure from nucleate boiling measurements in a representative PWR fuel assembly. On behalf of the benchmark team, PSU in collaboration with US NRC has performed supporting calculations using the PSU in-h

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Bolea, Yolanda, Vicenç Puig, and Antoni Grau. "Discussion on Muskingum versus Integrator-Delay Models for Control Objectives." Journal of Applied Mathematics 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/197907.

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A comparative study about two models, Muskingum and integrator-delay (ID) models, for canal control is presented. The former is a simplified hydrological model which is very simple and extensively used in hydraulic engineering for simulation and prediction. The latter is also a model with physical meaning and is widely used for irrigation canals control. Due to a lack of general awareness of Muskingum prediction model in regulation from the control community, authors present this comparative study with the ID control model. Both models have been studied and analyzed for control purposes. This

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Bayon-Barrachina, Arnau, and Petra Amparo Lopez-Jimenez. "Numerical analysis of hydraulic jumps using OpenFOAM." Journal of Hydroinformatics 17, no. 4 (2015): 662–78. http://dx.doi.org/10.2166/hydro.2015.041.

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The present paper deals with a hydraulic jump study, characterization and numerical modeling. Hydraulic jumps constitute a common phenomenon in the hydraulics of open channels that increases the shear stress on streambeds, so promoting their erosion. A three-dimensional computational fluid dynamics model is proposed to analyze hydraulic jumps in horizontal smooth rectangular prismatic open-air channels (i.e., the so-called classical hydraulic jump). Turbulence is modeled using three widely used Reynolds-averaged Navier–Stokes (RANS) models, namely: Standard k − ɛ, RNG k − ɛ, and SST k − ω. The

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Sina, Najibi. "Investigating pressure changes at the bottom of the stilling basin after the stepped spillway using a numerical model." World Journal of Advanced Research and Reviews 20, no. 2 (2023): 868–76. https://doi.org/10.5281/zenodo.12592006.

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Stepped spillways are hydraulic components of dams used to dissipate energy downstream of the dams. Numerous studies have been conducted to understand the hydraulics of flow on stepped spillways, primarily in laboratory settings. The flow passing over stepped spillways can be categorized into two types of flow regimes: Nappe Flow and non-Nappe Flow. In this research, the FLOW-3D software was utilized to model the Cardan configuration of the downstream basin of the stepped overflow based on laboratory data. In this investigation, we compared the distribution profile of maximum, minimum, and ave

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Delis, Anargiros I., and Ioannis K. Nikolos. "Shallow Water Equations in Hydraulics: Modeling, Numerics and Applications." Water 13, no. 24 (2021): 3598. http://dx.doi.org/10.3390/w13243598.

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This Special Issue aimed to provide a forum for the latest advances in hydraulic modeling based on the use of non-linear shallow water equations (NSWEs) and closely related models, as well for their novel applications in practical engineering. NSWEs play a critical role in the modeling and simulation of free surface flows in rivers and coastal areas and can predict tides, storm surge levels and coastline changes from hurricanes and ocean currents. NSWEs also arise in atmospheric flows, debris flows, internal flows and certain hydraulic structures such as open channels and reservoirs. Due to th

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Garcia, Matthew, Andrew Juan, and Philip Bedient. "Integrating Reservoir Operations and Flood Modeling with HEC-RAS 2D." Water 12, no. 8 (2020): 2259. http://dx.doi.org/10.3390/w12082259.

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Current free to use models developed by the United States Army Corps of Engineers (USACE) perform unique functions (e.g., hydrology, hydraulics, reservoir operations, and flood impact analysis) that are widely used in numerous studies and applications. These models are commonly set up in a framework that is limited to point source connections, which is problematic in regions with flat topography and complex hydrodynamics. The separate models need to be integrally linked and jointly considered for accurate risk communication and decision-making, especially during major storm events. Recently, H

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Power, Mary E., Adrian Sun, Gary Parker, William E. Dietrich, and J. Timothy Wootton. "Hydraulic Food-Chain Models." BioScience 45, no. 3 (1995): 159–67. http://dx.doi.org/10.2307/1312555.

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Ormsbee, Lindell E., and Srinivasa Lingireddy. "Calibrating hydraulic network models." Journal - American Water Works Association 89, no. 2 (1997): 42–50. http://dx.doi.org/10.1002/j.1551-8833.1997.tb08177.x.

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Nguyen, Thuy Huu, Matthias Langensiepen, Jan Vanderborght, Hubert Hüging, Cho Miltin Mboh, and Frank Ewert. "Comparison of root water uptake models in simulating CO<sub>2</sub> and H<sub>2</sub>O fluxes and growth of wheat." Hydrology and Earth System Sciences 24, no. 10 (2020): 4943–69. http://dx.doi.org/10.5194/hess-24-4943-2020.

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Abstract. Stomatal regulation and whole plant hydraulic signaling affect water fluxes and stress in plants. Land surface models and crop models use a coupled photosynthesis–stomatal conductance modeling approach. Those models estimate the effect of soil water stress on stomatal conductance directly from soil water content or soil hydraulic potential without explicit representation of hydraulic signals between the soil and stomata. In order to explicitly represent stomatal regulation by soil water status as a function of the hydraulic signal and its relation to the whole plant hydraulic conduct

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Khadka, S. S., S. P. Timalsina, S. Chaudhary, and R. K. Maskey. "Physical Modeling of Headwork of a Hydroelectric Project Located in Nepal Himalayas." Journal of Physics: Conference Series 2629, no. 1 (2023): 012017. http://dx.doi.org/10.1088/1742-6596/2629/1/012017.

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Abstract The Himalayan Rivers have a complex nature in terms of hydraulics and sediment transport capacity, which is a great challenge for civil and hydraulic engineers in designing the headworks of a hydropower project. The conventional and numerical analysis and design of hydraulic structures only are inadequate to represent the behavior of a complex river system. Hence, the physical models of hydraulic structures are the only tools that can be used to analyze complex behavior and efficiently design headworks on such rivers. The physical models are used to predict and visualize the performan

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Bamshad, Hamid, Seongwon Jang, Hyemi Jeong, Jaesung Lee, and Hyunseok Yang. "Comparison between Genetic Programming and Dynamic Models for Compact Electrohydraulic Actuators." Machines 10, no. 10 (2022): 961. http://dx.doi.org/10.3390/machines10100961.

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A compact electrohydraulic actuator (C-EHA) is an innovative hydraulic system with a wide range of applications, particularly in automation, robotics, and aerospace. The actuator provides the benefits of hydraulics without the expense and space requirements of full-sized hydraulic systems and in a much cleaner manner. However, this actuator is associated with some disadvantages, such as a high level of nonlinearity, uncertainty, and a lack of studies. The development of a robust controller requires a thorough understanding of the system behavior as well as an accurate dynamic model of the syst

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Yakirevich, Alexander. "Water Flow, Solute and Heat Transfer in Groundwater." Water 12, no. 7 (2020): 1851. http://dx.doi.org/10.3390/w12071851.

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Groundwater is an essential and vital water resource for drinking water production, agricultural irrigation, and industrial processes. The better understanding of physical and chemical processes in aquifers enables more reliable decisions and reduces the investments concerning water management. This Special Issue on “Water Flow, Solute and Heat Transfer in Groundwater” of Water focuses on the recent advances in groundwater dynamics. In this editorial, we introduce 12 high-quality papers that cover a wide range of issues on different aspects related to groundwater: protection from contamination

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Liu, Yanlan, Nataniel M. Holtzman, and Alexandra G. Konings. "Global ecosystem-scale plant hydraulic traits retrieved using model–data fusion." Hydrology and Earth System Sciences 25, no. 5 (2021): 2399–417. http://dx.doi.org/10.5194/hess-25-2399-2021.

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Abstract. Droughts are expected to become more frequent and severe under climate change, increasing the need for accurate predictions of plant drought response. This response varies substantially, depending on plant properties that regulate water transport and storage within plants, i.e., plant hydraulic traits. It is, therefore, crucial to map plant hydraulic traits at a large scale to better assess drought impacts. Improved understanding of global variations in plant hydraulic traits is also needed for parameterizing the latest generation of land surface models, many of which explicitly simu

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Ramos, Helena M., Armando Carravetta, Aonghus Mc Nabola, and Kemi Adeyeye. "Environmental Hydraulics Research." Water 12, no. 10 (2020): 2749. http://dx.doi.org/10.3390/w12102749.

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Environmental hydraulics research includes the different domains of hydrodynamics, such as the investigation and implementation of the physical and experimental applications, and research into the quantity, quality, modelling and simulation of the attributes associated with flowing water. This topic is studied both from a technical and environmental point of view, with the objective of protecting and enhancing the quality of the environment. It is a cross-disciplinary field of study which comprises open channel/river flows and pressurised systems, combining, among others, new technological, so

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Yue, Daling, Hongfei Gao, Zengguang Liu, Liejiang Wei, Yinshui Liu, and Xiukun Zuo. "Potential Energy Recovery and Direct Reuse System of Hydraulic Hybrid Excavators Based on the Digital Pump." Energies 16, no. 13 (2023): 5229. http://dx.doi.org/10.3390/en16135229.

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The potential energy recovery of hydraulic excavators is very significant for improving energy efficiency and reducing pollutant emissions. However, the more common solutions for potential energy recovery require more energy conversion processes before these potential energies can be reused, which adds to the complexity and high cost of the system. To tackle the above challenges, we proposed a novel energy recovery system for hydraulic hybrid excavators based on the digital pump with an energy recovery function. The new system could operate in three different modes: pump, energy recovery, and

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Bauer-Gottwein, Peter, Linda Christoffersen, Aske Musaeus, Monica Coppo Frías, and Karina Nielsen. "Hydraulics of Time-Variable Water Surface Slope in Rivers Observed by Satellite Altimetry." Remote Sensing 16, no. 21 (2024): 4010. http://dx.doi.org/10.3390/rs16214010.

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The ICESat-2 and SWOT satellite earth observation missions have provided highly accurate water surface slope (WSS) observations in global rivers for the first time. While water surface slope is expected to remain constant in time for approximately uniform flow conditions, we observe time varying water surface slope in many river reaches around the globe in the ICESat-2 record. Here, we investigate the causes of time variability of WSSs using simplified river hydraulic models based on the theory of steady, gradually varied flow. We identify bed slope or cross section shape changes, river conflu

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Tng, DYP. "Rainforest trees respond to drought by modifying their hydraulic architecture." Ecology and Evolution 8, no. 24 (2018): 12479–91. https://doi.org/10.1002/ece3.4601.

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Increased drought is forecasted for tropical regions, with severe implications for the health and function of forest ecosystems. How mature forest trees will respond to water deficit is poorly known. We investigated wood anatomy and leaf traits in lowland tropical forest trees after 24 months of experimental rainfall exclusion. Sampling sun‐exposed young canopy branches from target species, we found species‐specific systematic variation in hydraulic‐related wood anatomy and leaf traits in response to drought stress. Relative to controls, drought‐affected individuals of different tree species v

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Carlos, Andrés Caro-Camargo, and Alberto Bayona-Romero Julián. "Hydro-dynamic modeling for identification of flooding zones in the city of Tunja." Revista Facultad de Ingeniería -redin-, no. 88 (September 18, 2018): 40–54. https://doi.org/10.17533/udea.redin.n88a05.

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The present article elaborates a hydrological and hydraulic model of the Jordán and the Vega rivers in the environs of the city of Tunja in order to enable the identification of potential flood zones. The first model was implemented in HEC - HMS together with the Geographic Information System (ArcGIS) and the incorporation of the HEC-GeoHMS extension; based on official information provided by Corporación Autónoma Regional de Boyacá (CORPOBOYACÁ) and El Instituto de Hidrología y Metereología de Colombia (IDEAM). The considerations adopted in this

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Khusainov, A. T., and A. V. Strekalov. "MODELS HYDRAULIC COMPONENTS PRODUCTIVE FORMATIONS." Oil and Gas Business, no. 5 (October 2014): 119–33. http://dx.doi.org/10.17122/ogbus-2014-5-119-133.

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