One Dimensional Hydrodynamic Modeling of River Flow Using DEM Extracted River Cross-sections

2009 ◽  
Vol 24 (5) ◽  
pp. 835-852 ◽  
Author(s):  
Niranjan Pramanik ◽  
Rabindra Kumar Panda ◽  
Dhrubajyoti Sen
Keyword(s):  
Cross Sections ◽  
River Flow ◽  
Hydrodynamic Modeling ◽  
One Dimensional

scholarly journals Hydrodynamic modelling of historical flood event using one dimensional HEC-RAS in Kelantan basin, Malaysia

2021 ◽  
Vol 920 (1) ◽  
pp. 012031
Author(s):  
M Z S Armain ◽  
Z Hassan’ ◽  
M A Z Mohd Remy Rozainy ◽  
A N Kamarudzaman
Keyword(s):  
Cross Sections ◽  
River Flow ◽  
Model Development ◽  
Simulation Models ◽  
Flood Events ◽  
Hydraulic Simulation ◽  
One Dimensional ◽  
Calibration And Validation ◽  
Modelling Methodology ◽  
Analysis System

Abstract Hydraulic simulation models are critical tools for analysing the hydraulic properties of a river’s system flow. The work focuses on the simulation of a river flow in a Kelantan basin using the one-dimensional (1D) Hydrologic Engineering Center - River Analysis System (HECRAS). In the present study, cross-sections from survey data were utilised into the RAS Mapper provided in HEC-RAS 5.0 to simulate the river flow in the region. This study highlights the modelling methodology with a focus on data collection and its importance during the calibration and validation process. The model was used to discover the expected peak flood levels based on historical flood events. Simulated flows were utilised to examine the potential of the model during the model development procedure. The simulation outcomes reveal that the simulated flows are in excellent agreement during the model development as the obtained R2 value was between 0.95 to 1.0 during both model calibration and validation. This demonstrates the applicability of the HEC-RAS 1D model in simulating precise river flow, especially for flood events.

scholarly journals Minimisation of Overestimation of River Flows in 1D- Hydrodynamic Modeling

2021 ◽  
Author(s):  
Komal Vashist ◽  
K. K. Singh
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
River Flow ◽  
Model Performance ◽  
Mean Square ◽  
Hydrodynamic Models ◽  
One Dimensional ◽  
Index Of Agreement ◽  
Error Index ◽  
River Cross Section

Abstract One-dimensional hydrodynamic models overestimate river cross-section derived from freely available SRTM DEMs. The present study aims to minimize the overestimation of river flow. DEM-extracted cross-sections obtained from 30 m and 90 m resolutions show higher elevation values than the actual river cross sections of Krishna and Bhima rivers, India. To minimize the overestimation of the river flow, DEM-extracted cross-sections are modified using known cross-section of the river. The corrections for cross sections extracted from DEM, are obtained by subtracting the DEM-derived cross-sections from a known cross-section of the river. Monsoons flows that occurred in years 2006 and 2009 in Krishna and Bhimariver have been used for modeling. The MIKE HYDRO River model performance with modified DEM-extracted cross-sections of river improves as the correlation coefficient, root mean square error, index of agreement, Nash Sutcliffe efficiency & Percentage deviation in peak (%) values are improved.

Consistent Generation and Functionalization of One-Dimensional Cross Sections for TRAC-BF1

1994 ◽  
Vol 107 (2) ◽  
pp. 125-137 ◽  
Author(s):  
José Luis Muñoz-Cobo ◽  
Gumersindo Verdú ◽  
Claubia Pereira ◽  
Alberto Escrivá ◽  
José Ródenas ◽  
...  
Keyword(s):  
Cross Sections ◽  
One Dimensional

Hydraulic modelling of extreme flood event of semi-arid river basin

2021 ◽  
Author(s):  
Mohamedmaroof Shaikh ◽  
Sanjaykumar Yadav ◽  
Vivek Manekar
Keyword(s):  
Cross Sections ◽  
Management Strategy ◽  
Retaining Wall ◽  
Hydraulic Model ◽  
Flood Event ◽  
Railway Bridge ◽  
Hydraulic Modelling ◽  
One Dimensional ◽  
Extreme Flood ◽  
High Flood

<p>Floods are among the severe weather disasters that cause catastrophic damage to surroundings and adversely impact populations. This study aims to create a one-dimensional (1D) hydraulic model using HEC-RAS for the Rel River in Banaskantha, Gujarat, India. The model has been developed for the extreme flood event of July 2017. A total of hundred cross-sections have been used as geometric data. The peak discharge of 3355 m<sup>3</sup>/s and the river slope has been applied as upstream and downstream boundary conditions. The model has been calibrated and validated using observed water depth at Railway bridge and Highway bridge. Critical cross-sections have been identified using the 1D hydraulic model. Eight out of the hundred cross-sections were safe for a flood discharge of 3355 m<sup>3</sup>/s. The villages at high flood risk are identified for this discharge. To mitigating floods, the construction of a retaining wall or levees is recommended to protect these villages. This study can help a disaster management strategy for the cities and town in the River’s vicinity.</p>

Analytical solution for twinning deformation effect of pre-strained shape memory effect beam-columns

2019 ◽  
Vol 30 (14) ◽  
pp. 2147-2165 ◽  
Author(s):  
Alireza Ostadrahimi ◽  
Fathollah Taheri-Behrooz
Keyword(s):  
Shape Memory Alloy ◽  
Analytical Solution ◽  
Shape Memory ◽  
Cross Sections ◽  
Bending Stress ◽  
Deformation Effect ◽  
One Dimensional ◽  
Beam Columns ◽  
Analytical Expressions ◽  
Good Agreement

In this article, an analytical solution is presented for twinning deformation effect of a prismatic shape memory alloy beam-column. To this end, a reduced one-dimensional Souza model is employed to study the bending stress of a pre-strained shape memory alloy beam-column at low temperatures. Analytical expressions for bending stress as well as polynomial approximations for deflection are obtained. Derived equations for bending problem are employed to analyze twinning deformation effect of shape memory alloy beam-columns with rectangular and circular cross sections. Furthermore, the distance of zero-stress fiber from the center line during loading is studied. The results of this work show good agreement when compared with experimental data and finite element results.

scholarly journals Development of RiverBox—An ArcGIS Toolbox for River Bathymetry Reconstruction

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1266 ◽  
Author(s):  
Tomasz Dysarz
Keyword(s):  
Cross Sections ◽  
River Flow ◽  
Computational Time ◽  
Fully Integrated ◽  
River Bed ◽  
Develop Software ◽  
Scripting Language ◽  
Gis Environment ◽  
Elevation Model ◽  
Model Preparation

The main purpose of the present research is to develop software for reconstruction of the river bed on the basis of sparse cross-section measurements. The tools prepared should support the process of hydrodynamic model preparation for simulation of river flow. Considering the formats of available data and the requirements of modern modeling techniques, the prepared software is fully integrated with the GIS environment. The scripting language Python 2.7 implemented in ArcGIS 10.5.1 was chosen for this purpose. Two study cases were selected to validate and test the prepared procedures. These are stream reaches in Poland. The first is located on the Warta river, and the second on the Ner river. The data necessary for the whole procedure are: a digital elevation model, measurements of the cross-sections in the form of points, and two polyline layers representing an arbitrary river centerline and river banks. In the presented research the concept of a channel-oriented coordinate system is applied. The elevations are linearly interpolated along the longitudinal and transversal directions. The interpolation along the channel is implemented in three computational schemes linking different tools available in ArcGIS and ArcToolbox. A simplified comparison of memory usage and computational time is presented. The scheme linking longitudinal and spatial interpolation algorithms seems to be the most advantageous.

scholarly journals Impact of Energy Slope Averaging Methods on Numerical Solution of 1D Steady Gradually Varied Flow

2015 ◽  
Vol 62 (3-4) ◽  
pp. 101-119 ◽  
Author(s):  
Wojciech Artichowicz ◽  
Dzmitry Prybytak
Keyword(s):  
Numerical Methods ◽  
Numerical Solution ◽  
Numerical Integration ◽  
Cross Sections ◽  
Flow Model ◽  
One Dimensional ◽  
Averaging Methods ◽  
Integration Formulas ◽  
Different Types ◽  
The One

AbstractIn this paper, energy slope averaging in the one-dimensional steady gradually varied flow model is considered. For this purpose, different methods of averaging the energy slope between cross-sections are used. The most popular are arithmetic, geometric, harmonic and hydraulic means. However, from the formal viewpoint, the application of different averaging formulas results in different numerical integration formulas. This study examines the basic properties of numerical methods resulting from different types of averaging.

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