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

Dysarz, Tomasz

doi:10.3390/w10101382

Cited by 25 publications

(22 citation statements)

References 25 publications

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“…The last element was the shape parameter of the falling limb α [45]. [46][47][48]. The system of St. Venant equations consists of two partial differential equations shown below.…”

Section: Methodsmentioning

confidence: 99%

Possibilities of Controlling the River Outlets by Weirs on the Example of Noteć Bystra River

et al. 2020

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The possibility of effective control of selected dams in the Noteć Bystra river is analyzed. Such a control is expected to permit inundation of selected arable areas, e.g., peat grasslands, to avoid flooding of the city of Czarnków and the terrains located downstream. The chosen case study is the reach of the Noteć River between the dams Pianowka-Mikolajewo-Rosko. The analysis was made on the basis of simulations of the flow and regulation of dams in flood conditions. The flow peaks of hypothetical flood waves were designed according to the directions of the ISOK project (Informatyczny System Osłony Kraju przed nadzwyczajnymi zagrożeniami-IT System of the Country's Protection Against Extreme Hazards) as the maximum flows over 10-years (p = 10%), 100-years (p = 1%), and 500-years (p = 0.2%). The obtained results are presented as longitudinal profiles of the water surface, maps of inundated areas and maps of inundated soils. The main conclusion is that the robust control of dams reduces the peak of flow during flood wave propagation and forces inundation of the a priori selected areas. It helps to decrease the spatial range of the flood hazard and significantly reduces risk related to floods.Sustainability 2020, 12, 2369 2 of 20 reduce flood consequences [21,22]. Efficient decision support systems should permit analysis of weather forecasts as well as analysis of watershed outflow generation. Such a system should support determination of reservoir decision rules on the basis of all available information including reservoir capacity and current amount of water stored [23,24].The impacts of climate change on hydrological alteration such as floods and drought pose a significant threat to floodplain environments [25][26][27]. Integrated water resources management (IWRM) is a practical approach which promotes responsible development and management of water and land resources considering the main parts of sustainability, i.e., economy, equity, and environment [28,29]. Adaptation of existing water infrastructure to climate change is becoming an important strategy for water management in floodplain areas. Karpack et al. [30] have suggested that humans have impacted on floodplain functionality by changing the physical landscape of floodplains and by altering river flows. A generally accepted solution used for flood protection is construction of reservoirs [31,32]. This study shows that the water infrastructure (weirs and dams) located in rivers could also be effectively used for water management including flood protection as well as for regulation and control of seasonal inundation at floodplain areas. Similar results have been obtained by Contreras et al. [33], who have shown that river flood manipulations by weirs and sluice gates provide water for agricultural activity without costly infrastructural and technical investigations.Analysis of flood risk has become very important and is the basis for the EU Flood Directive that started to take effect from November 26th, 2007 [34]. The Directive obliges Poland as well as othe...

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“…The last element was the shape parameter of the falling limb α [45]. [46][47][48]. The system of St. Venant equations consists of two partial differential equations shown below.…”

Section: Methodsmentioning

confidence: 99%

Possibilities of Controlling the River Outlets by Weirs on the Example of Noteć Bystra River

et al. 2020

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“…The Pywin32 module (PythonCOM Documentation Index, 2017) and Pywinauto (Pywinauto Contributors Community, 2019) modules were chosen for this purpose. The first was implemented to access HEC-RAS's API (Application Programming Interface) called HECRASController (Dysarz, 2018b). The most detailed description of this collection of programming tools was presented by Goodell (2014).…”

Section: Python Scripting and Control Of Simulationsmentioning

confidence: 99%

Development of methodology for assessment of long‐term morphodynamic impact on flood hazard

Dysarz

2020

J Flood Risk Management

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A methodology for quantification of the impact of sediment transport on flood hazard is proposed. The applied algorithm consists of several Python scripts for automation of sediment routing, hydrodynamic simulations, and geoprocessing of results. Flood hazard maps are uniquely linked with particular simulations of morphological changes in a river. Finally, the maps are stochastically processed. The proposed procedure was applied for a selected reach of the Warta river, located in Poland. Simulations were run for 6-and 12-year flow series composed randomly on the basis of historical data. The 30 flow series for each period and four functions describing the transport of sediment were treated as uncertain variables. It was assumed that the features characterising the mean sample may properly represent the sediment content in the river reach studied. The final results are presented as maps showing the probabilities of inundation. The comparison of results with literature data confirmed the significance of the impact related to sediment transport processes on the quantification of flood hazard uncertainty. The main advantages of the presented algorithm are effective management of simulations and processing of results obtained in 240 runs of the sediment routing model. K E Y W O R D S flood hazard assessment, flood mapping, modelling of sediment transport, python scripting 1 | INTRODUCTION The interactions between sediment transport and flood hazard seem to be obvious (e.g., Sear, Newson, & Brookes, 1995), yet these two processes are rarely linked together in a long-term perspective. An exception is an article by Pender, Patidar, Pender, and Haynes (2016), which also indicates the complexity of the mentioned problem. However, modern modelling tools, GIS processing systems, as well as programming languages, provide a sufficient framework for such analyses today.

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“…Brief descriptions of this package may be found in PythonCOM Documentation Index (2017). The application of Python language with Pywin32 library is described in Dysarz (2018b). The second module, ArcPy, is fully integrated with ArcGIS (Zandbergen 2013).…”

Section: Automation With Python Scriptsmentioning

confidence: 99%

Analysis of extreme flow uncertainty impact on size of flood hazard zones for the Wronki gauge station in the Warta river

et al. 2019

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In this paper, the impact of maximum flow uncertainty on flood hazard zone is analyzed. Two factors are taken into account: (1) the method for determination of maximum flows and (2) the limited length of the data series available for calculations. The importance of this problem is a consequence of the implementation of the EU Flood Directive in all EU member states. The factors mentioned seem to be among the most important elements responsible for potential uncertainty and inaccuracy of the developed flood hazard maps. Two methods are analyzed, namely the quantiles method and the maximum likelihood method. The maximum flows are estimated for the Wronki gauge station located in the reach of the Warta river. This simple river system is located in the central part of Poland. The length of the available data is 44 years. Hence, the series of the lengths 40, 30 and 20 years are tested and compared with reference calculations for 44 years. The hydrodynamic model HEC-RAS is used to calculate water surface profiles in steady state flow. The Python scripting language is applied for automation of HEC-RAS calculations and processing of final results in the form of inundation maps. The number of trials for each factor is not huge to keep the presented methodology useful in practice. The chosen measure of uncertainty is the range of variability for maximum flow values as well as inundation areas. The estimated values stressed the great importance of the factors analyzed for the uncertainty of the maximum flows as well as inundation areas. The impact of the data series length on the maximum flows is straightforward; a shorter data series gives a wider range of variability. However, the dependencies between other factors are more complex. Hence, the application of methodology based on the simulation and GIS data processing for assessment of this problem seems to be quite a good approach.

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

Cited by 25 publications

References 25 publications

Possibilities of Controlling the River Outlets by Weirs on the Example of Noteć Bystra River

Possibilities of Controlling the River Outlets by Weirs on the Example of Noteć Bystra River

Development of methodology for assessment of long‐term morphodynamic impact on flood hazard

Analysis of extreme flow uncertainty impact on size of flood hazard zones for the Wronki gauge station in the Warta river

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