Operation of Gate-Controlled Irrigation System Using HEC-RAS 2D for Spring Flood Hazard Reduction

Abstract

Flooding events have been negatively affecting the Republic of Kazakhstan, with higher occurrence in flat parts of the country during spring snowmelt in snow-fed rivers. The current project aims to assess the flood hazard reduction capacity of Alva irrigation system, which is located in the interfluve area of Yesil and Nura Rivers. The assessment is performed by simulating spring floods using HEC-RAS 2D and controlling the gates of the existing system. A digital elevation model of the study domain was generated by integration of Sentinel-1 radar images with the data obtained from bathymetrical survey and aerial photography. Comparison of the simulated inundation area with a remote sensing image of spring flood in April 2019 indicated that the main reason for differences was due to local snowmelt in the study domain. Exclusion of areas flooded by local snowmelt, which were identified using the updated DEM, from comparison increased the model similarity to 70%. Further simulations of different exceedance probability hydrographs enabled classification of the study area according to maximum flood depth and flood duration. Theoretical changes on the dam crest as well as additional gates were proposed to improve the system capacity by flooding agriculturally important areas, which were not flooded during the simulation of the current system. The developed model could be used by local authorities for further development of flood mitigation measures and assessment of different development plans of the irrigation system.

Integrated Hydrological Modeling for Watershed Analysis, Flood Prediction, and Mitigation Using Meteorological and Morphometric Data, SCS-CN, HEC-HMS/RAS, and QGIS

“…The simultaneous occurrence of flash floods and debris flows raises significant safety concerns because they can compound the risks associated with each distinct generative activity [5]. Given the global occurrence of flooding episodes in many forms, including coastal, riverine, urban, and flash floods, assessing flood hazards is a constantly relevant and significant topic of research [6][7][8][9].…”

“…This, coupled with the availability of high-quality input data and an abundance of remote sensing data for calibration purposes, has led to the widespread use of hydraulic models. Currently, hydrodynamic models include the Iber, Hydrologic Engineering Center-River Analysis System (HEC-RAS), Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS), Mike 21, TUFLOW, SOBEK, and BASEMENT [6].…”

Developing Internal and External Proportional Integral Derivative Water Surface Controller in HEC-RAS

“…Additionally, integration with other models or simulation techniques is possible with HEC-RAS [16,17]. HEC-RAS is utilized for the calibration and selection of the most appropriate Manning's roughness coefficient using common boundary conditions [18].…”

The Problem of Effective Evacuation of the Population from Floodplains under Threat of Flooding: Algorithmic and Software Support with Shortage of Resources

“…Therefore, the algorithms for organizing the safe evacuation of the population of floodplain territories under the conditions of a fairly accurate forecast of the development of floods are of great practical importance [31,32]. The improvement of high-performance computing technologies provides such forecasting and the development of appropriate algorithms has become possible on the basis of interdisciplinary simulations and solving various high-dimensional optimization problems [17,[33][34][35][36][37][38][39][40].…”

“…Finally, since the most important component of evacuation modeling is a hydrodynamic model for forecasting the hydrological regime of a flooded area, we point out the current results of such computer modeling for various water systems [12,16,17,21,23,33,38,71,72]. Modeling of floods near rivers has shown its effectiveness for constructing cadastral maps of water supply [24,36,73].…”