scholarly journals Application of Python Scripting Techniques for Control and Automation of HEC-RAS Simulations

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1382 ◽  
Author(s):  
Tomasz Dysarz
Keyword(s):  
Sediment Transport ◽  
River Flow ◽  
Data File ◽  
Automatic Calibration ◽  
Sediment Samples ◽  
Python Script ◽  
The Third ◽  
Python Scripting ◽  
Flow And Sediment Transport ◽  
Sediment Data

The purpose of the paper was to present selected techniques for the control of river flow and sediment transport computations with the programming language Python. The base software for modeling of river processes was the well-known and widely used HEC-RAS. The concepts were tested on two models created for a single reach of the Warta river located in the central part of Poland. The ideas described were illustrated with three examples. The first was a basic simulation of a steady flow run from the Python script. The second example presented automatic calibration of model roughness coefficients with Nelder-Mead simplex from the SciPy module. In the third example, the sediment transport was controlled by Python script. Sediment samples were accessed and changed in the sediment data file stored in XML format. The results of the sediment simulation were read from HDF5 files. The presented techniques showed good effectiveness of this approach. The paper compared the developed techniques with other, earlier approaches to control of HEC-RAS computations. Possible further developments were also discussed.

scholarly journals River flow and sediment transport simulation based on a curvilinear and rectilinear grid modelling approach – a comparison study

2017 ◽  
Vol 17 (5) ◽  
pp. 1325-1334 ◽  
Author(s):  
G. G. Morianou ◽  
N. N. Kourgialas ◽  
G. P. Karatzas ◽  
N. P. Nikolaidis
Keyword(s):  
Sediment Transport ◽  
River Flow ◽  
Morphological Changes ◽  
Field Measurements ◽  
Grid Model ◽  
Curvilinear Grid ◽  
Saint Venant Equations ◽  
Flow And Sediment Transport ◽  
Downstream Section ◽  
The Difference

In the present work, a two-dimensional (2D) hydraulic model was used for the simulation of river flow and sediment transport in the downstream section of the Koiliaris River Basin in Crete, Greece, based on two different structured grids. Specifically, an important goal of the present study was the comparison of a curvilinear grid model with a rectilinear grid model. The MIKE 21C model has been developed to simulate 2D flows and morphological changes in rivers by using either an orthogonal curvilinear grid or a rectilinear grid. The MIKE 21C model comprises two parts: (a) the hydrodynamic part that is based on the Saint-Venant equations and (b) the morphological change part for the simulation of bank erosion and sediment transport. The difference between the curvilinear and the rectilinear grid is that the curvilinear grid lines follow the bank lines of the river, providing a better resolution of the flow near the boundaries. The water depth and sediment results obtained from the simulations for the two different grids were compared with field observations and a series of statistical indicators. It was concluded that the curvilinear grid model results were in better agreement with the field measurements.

scholarly journals Pembuatan Model Kendali Mutu Data Sedimen

2019 ◽  
Vol 9 (2) ◽  
Author(s):  
Sri Mulat Yuningsih ◽  
Asep Ferdiansyah ◽  
Muhammad Fauzi
Keyword(s):  
Quality Control ◽  
Sediment Transport ◽  
Data Quality ◽  
River Flow ◽  
Control Model ◽  
Special Treatment ◽  
Data Quality Control ◽  
Discharge Data ◽  
Sediment Rating Curve ◽  
Sediment Data

Special treatment for watershed management was needed due to severe of watershed condition in most regions in Indonesia. The treatment should be directed to comprehensive changes of management paradigm for all aspects in it. Those were indicated by the increasing of disasters around the watershed, such as floods, droughts, landslides, erosion and increased of sediment transported by the river basin. The increasing of sedimentation which occurs in the river flow will disrupt the performance of existing hydraulic structure in the river. The event could be monitored by hydrological data, especially with the continuously and accurately of discharge and sediment data. In order to solve the problem, sediment data quality control model was needed. The purpose of this research is to determined suspended sediment data quality control model, in order to have continuous and quality guaranteed of sediment transport data. The scopes of this sediment data quality control were making criteria and sub, determining rank priority between criteria and sub, arranging scoring form, trial and error, finalization. The model consists of three main stages, there are measurement of discharge and taking sediment sample (QC1), drawing of sediment rating curve (QC2), and conversion of discharge data to sediment transport (QC3).

Two dimensional river flow and sediment transport model

2014 ◽  
Vol 15 (3) ◽  
pp. 595-625 ◽  
Author(s):  
Zoltan Horvat ◽  
Mirjana Isic ◽  
Miodrag Spasojevic
Keyword(s):  
Sediment Transport ◽  
River Flow ◽  
Transport Model ◽  
Two Dimensional ◽  
Sediment Transport Model ◽  
Flow And Sediment Transport

scholarly journals Application of a 3D Layer Integrated Numerical Model of Flow and Sediment Transport Processes to a Reservoir

Water ◽  
2015 ◽  
Vol 7 (10) ◽  
pp. 5239-5257 ◽  
Author(s):  
Shervin Faghihirad ◽  
Binliang Lin ◽  
Roger Falconer
Keyword(s):  
Sediment Transport ◽  
Numerical Model ◽  
Transport Processes ◽  
Flow And Sediment Transport

Modelling Sediment Transport in the disastrous Flash Flood of November 2017 in Mandra (Attica, Greece)  

2021 ◽  
Author(s):  
Vasiliki Sant ◽  
George Mitsopoulos ◽  
Aristides Bloutsos ◽  
Anastasios Stamou
Keyword(s):  
Sediment Transport ◽  
Flash Flood ◽  
Catastrophic Event ◽  
Marine Research ◽  
National Network ◽  
The Third ◽  
Debris Transport ◽  
Sediment Transport Equation ◽  
Analysis System ◽  
General Secretariat

<p> </p><p><strong>Abstract</strong></p><p>The flash flood in Mandra on the 15<sup>th</sup> of November 2017 was the third most disastrous “November” flood in Attica; it was characterized by heavy sediment and debris transport that can be easily observed in Figure 1.</p><p>We applied the Hydrologic Engineering Center's-River Analysis System (HEC-RAS) to model sediment transport using the Ackers-White sediment transport equation that is engraved in HEC-RAS to analyze sediment transport characteristics. The required input data were based on a limited number of available studies, which mainly include a survey performed by the Hellenic Centre for Marine Research in the coastal area of the Elefsis Bay where sediments were deposited after the catastrophic event. We compared the results of the model with calculations performed within a previous Thesis in 2018 using TELEMAC-2D and SISYPHE.</p><p>The present paper is based on the Diploma Thesis of the first author; it was performed within the project “National Network on Climate Change and its Impacts (CLIMPACT)” of the General Secretariat of Research and Technology.</p><p> </p><p><img src="https://contentmanager.copernicus.org/fileStorageProxy.php?f=gepj.5d3d3b91860061319301161/sdaolpUECMynit/12UGE&app=m&a=0&c=bc7fbb3ecf180060dec33436ebc2faea&ct=x&pn=gepj.elif&d=1" alt=""></p><p>Figure 1. The greater area of Mandra (a) before and (b) after the flood event</p>

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