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Water is a basic element of life and a significant requirement for human survival. Rivers are a main source of freshwater and play a vital role in water collection and supply. Annual heavy rainfall results in a high increase in river water levels. Understanding river flow hydrodynamics is crucial in successful water resource planning and hydrologic analysis. The simulation was carried out using HEC-RAS software and evaluate the water flow parameters of the river system. A specified section of the Upper Godavari River was selected as the site of investigation for intensive hydrologic and hydraulic study. Vishnupuri Dam is located on the Godavari River near Nanded. Flow data of three gauging stations on the Godavari River were obtained for hydraulic analysis. Landsat imagery of the river reach, namely the Dhalegaon, G. R. Bridge and Nanded segments, was downloaded from the BHUVAN platform. The river reach, including its watershed boundaries and river channel, was mapped using QGIS Wien software for hydraulic analysis. This operation helps in generating the river geometry within the river analysis model (HEC-RAS). The streamflow for designated recurrence durations of 3 and 5 years was determined with the help of Gumbel’s statistical distribution, based on the flow rate data from the past 10 years at the gauging station. Two discharge values are specified at the upstream boundaries, and the flow regime is assumed to be mixed flow, indicating the coexistence of subcritical and supercritical flow conditions within the river system. The flow constraints at the upstream and downstream ends are fixed. HEC-RAS calculates several flow parameters, such as height of the water surface, flow profiles, elevation of the energy grade line and flow velocity for each discharge case. High and low flow areas along the river reach have been determined by hydraulic modelling with HEC-RAS. A few of these parameters have a decreasing trend along the upstream-to-downstream direction, while some of them follow an increasing trend along the river's length.

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Steady Flow Simulation in the Upper Godavari River Using HEC-RAS 5.0.5

  • 会议论文

  • 发表日期：

    2026年

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  • Shubham Shukla,
  • Ruchika Dabas,
  • Sushant Kamal

摘要

Water is a basic element of life and a significant requirement for human survival. Rivers are a main source of freshwater and play a vital role in water collection and supply. Annual heavy rainfall results in a high increase in river water levels. Understanding river flow hydrodynamics is crucial in successful water resource planning and hydrologic analysis. The simulation was carried out using HEC-RAS software and evaluate the water flow parameters of the river system. A specified section of the Upper Godavari River was selected as the site of investigation for intensive hydrologic and hydraulic study. Vishnupuri Dam is located on the Godavari River near Nanded. Flow data of three gauging stations on the Godavari River were obtained for hydraulic analysis. Landsat imagery of the river reach, namely the Dhalegaon, G. R. Bridge and Nanded segments, was downloaded from the BHUVAN platform. The river reach, including its watershed boundaries and river channel, was mapped using QGIS Wien software for hydraulic analysis. This operation helps in generating the river geometry within the river analysis model (HEC-RAS). The streamflow for designated recurrence durations of 3 and 5 years was determined with the help of Gumbel’s statistical distribution, based on the flow rate data from the past 10 years at the gauging station. Two discharge values are specified at the upstream boundaries, and the flow regime is assumed to be mixed flow, indicating the coexistence of subcritical and supercritical flow conditions within the river system. The flow constraints at the upstream and downstream ends are fixed. HEC-RAS calculates several flow parameters, such as height of the water surface, flow profiles, elevation of the energy grade line and flow velocity for each discharge case. High and low flow areas along the river reach have been determined by hydraulic modelling with HEC-RAS. A few of these parameters have a decreasing trend along the upstream-to-downstream direction, while some of them follow an increasing trend along the river's length.