Mathematical Model Studies of Expected Flood Level of River Yamuna after Construction of Jewar Tappal Marginal Bund

  • Mathematical Model Studies of Expected Flood Level of River Yamuna after Construction of Jewar Tappal Marginal Bund
  • Mathematical Model Studies of Expected Flood Level of River Yamuna after Construction of Jewar Tappal Marginal Bund
  • Mathematical Model Studies of Expected Flood Level of River Yamuna after Construction of Jewar Tappal Marginal Bund

Client: Irrigation Department, Uttar Pradesh

Details:

Solution is provided by computation of excepted flood levels of the river Yamuna in the reach of Choudhary Charan Singh Jewar Tappal Marginal Bund from 0.0 km to 28.2 km, before and after the construction of the Marginal Bund

Mathematical model studies using HEC-RAS model have been conducted to study the expected flood level of river Yamuna after construction of Choudhary Charan Singh Jewar Tappal Marginal Bund by the Irrigation Department, Uttar Pradesh.

The model has been set up using the Survey of India toposheets of the reach. TIN (Triangular Irregular Network) model has been constructed. The baseline condition has been simulated using the cross sections derived from the TIN model and also by incorporating the existing bridge in the study reach. The observed flood hydrograph of has been used to simulate the flooding under baseline condition and after the construction of the proposed bund. A similar exercise was also carried out to compute the inundatation using the observed medium sized flood of 1998.

For the post bund construction scenario, the central line of the river has been constructed to force the segments of the cross sections being cut by the bund into the post bund portion by maintaining the equivalent depth during the pre bund conditions. Two cases have been simulated (1) with incorporation of five unregulated and one regulated openings in the bund, (2) after closing these openings.

This result may be considered on the safer side since, the additional scour which may occur during such high floods has not been accounted for in the simulation. Therefore, the actual increase in the flooding shall be lower than what have been simulated.

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