Sr. Engineering Manager - Hydraulics

Larsen & Toubro (L&T); Faridabad District; On-site; INR 900,000 - 1,500,000; Full time

Job summary

Larsen & Toubro (L&T) invites experienced hydraulic and hydrological engineers to contribute to water resources projects in India, including hydro power and pumped storage components. The role covers analysis, design, and integration with multidisciplinary teams to deliver safe, efficient water conveyance systems.

You will work with numerical modeling (HEC-RAS, Flow-3D, WHAMO, Hammer), plan reservoir and river-diversion schemes, and prepare design reports and tender documents.

Qualifications

Responsibilities

• Water availability studies to determine firm and secondary energy potential.
• Power potential studies to optimize plant capacity and energy output.
• Flood studies including hydrograph analysis, unit hydrograph development, and peak flood estimation.
• Flood Frequency Analysis (Annual/Partial Duration Series) to determine SPF and PMF.
• Reservoir and channel flood routing.
• Reservoir sedimentation studies to forecast long-term silting, establish new zero elevations, and assess project lifespan.
• Develop initial ideas and concepts for planning and designing hydro projects and PSP.
• Define general layout of the water conductor system (intakes, tunnels, penstocks, surge shafts, tailraces).
• Reservoir planning with various zones and Storage-Elevation curves; create initial filling plans for new reservoirs.
• Plan river diversion arrangements, including coffer dams and diversion tunnels/channels.
• Review and perform preliminary hydraulic designs for dams, barrages, intakes, and water conductor systems.
• Spillways, energy dissipation arrangements (plunge pools, stilling basins), and desilting chambers.
• Surge shafts/tanks and transient analysis for system stability.
• Cross-drainage structures (bridges, culverts), guide bunds, and flood protection embankments.
• Head loss calculations for waterways; uplift pressure calculations for structures; soil and rock scour calculations.
• Depth of cut-off and design of protection works; water surface profiles in rivers.
• Design comprehensive drainage systems for project areas and powerhouse drainage.
• 1D and 2D numerical analysis in HEC‑RAS for flood modeling, dam break studies, water surface profiles.
• 3D numerical analysis in Flow‑3D Hydro for sediment transport and structure interaction.
• Transient analysis using WHAMO and Hammer to design surge shafts/tanks and protect pipelines.
• Formulate numerical models, run simulations, and analyze results to identify design flaws.
• Dam break studies to model inundation maps and develop flood damage mitigation plans.
• Verifications for key design levels and structure sizes; ensure designs meet safety guidelines for design floods and return periods.
• Interface with geotechnical, civil, and mechanical teams to integrate hydraulic requirements.
• GIS for spatial analysis; coordinate with physical model studies to validate models.
• Compare numerical and physical model results to refine designs and ensure accuracy.
• Prepare Design Basis Reports and Hydraulic Design Reports; perform quantity estimation for cost planning and tender documents.
• Document analyses, assumptions, and conclusions for client and regulatory submission.

Job description

Role & responsibilities

1. Hydrological & Water Resource Analysis

• Conduct water availability studies to determine firm and secondary energy potential.
• Perform power potential studies to optimize plant capacity and energy output.
• Execute flood studies, including:
  • Hydrograph analysis, Unit Hydrograph development, and Peak Flood Estimation.
  • Flood Frequency Analysis (Annual/Partial Duration Series) to determine Standard Project Flood (SPF) and Probable Maximum Flood (PMF).
  • Reservoir and Channel Flood Routing.
• Lead reservoir sedimentation studies to forecast long‑term siltation, establish new zero elevations, and assess project lifespan.

2. Planning & Conceptual Design

• Develop initial ideas and concepts for the planning and designing of Hydro projects and PSP.
• Define the general layout of the water conductor system (intakes, tunnels, penstocks, surge shafts, tailraces).
• Conduct reservoir planning, including establishing various reservoir zones and developing Area‑Elevation and Storage‑Elevation curves.
• Create initial filling plans for new reservoirs.
• Plan river diversion arrangements, including coffer dams and diversion tunnels/channels.

3. Detailed Hydraulic Design & Analysis

• Review and perform preliminary hydraulic designs for all hydraulic structures:
  • Dams, Barrages, Intakes, and Water Conductor Systems.
  • Spillways, Energy Dissipation arrangements (e.g., plunge pools, stilling basins), and Desilting Chambers.
  • Surge Shafts/Tanks and Transient Analysis for system stability.
  • Cross‑drainage structures (Bridges, Culverts), Guide Bunds, and Flood Protection Embankments.
• Perform critical calculations including:
  • Head loss calculations for waterways.
  • Uplift pressure calculations for structures.
  • Soil and Rock Scour calculations.
  • Depth of cut‑off and design of protection works.
  • Water surface profiles in rivers.
• Design comprehensive drainage systems for project areas and powerhouse drainage.

4. Numerical Modeling & Simulation

• Conduct 1D and 2D numerical analysis in HEC‑RAS for flood modeling, dam break studies, and water surface profiles.
• Perform advanced 3D numerical analysis in software like Flow‑3D Hydro for complex flow patterns, sediment transport, and structure interaction.
• Carry out transient analysis using software (e.g., WHAMO, Hammer) to design and optimize surge shafts/tanks and protect the pipeline system.
• Formulate numerical models, run simulations, and analyze results to identify and rectify design flaws.

5. Dam Safety & Risk Mitigation

• Conduct Dam Break Studies to model inundation maps and develop Flood Damage Mitigation plans.
• Perform verifications for key design levels (Top of Dam, Spillway invert, Intake invert) and structure sizes (Spillway bays).
• Ensure designs meet all safety guidelines for selecting design floods and return periods.

6. Integration & Collaboration

• Interface with geotechnical, civil, and mechanical teams to integrate hydraulic requirements.
• Understand topographic and bathymetric survey data and utilize Geographic Information Systems (GIS) for spatial analysis.
• Coordinate with and understand Physical Model Studies (hydraulic and sediment) to validate numerical models.
• Compare numerical and physical model results to refine designs and ensure accuracy.

7. Documentation & Reporting

• Prepare Design Basis Reports and detailed Hydraulic Design Reports.
• Perform quantity estimation for cost planning and tender documents.
• Document all analyses, assumptions, and conclusions for client and regulatory submission.

Preferred candidate profile

Specializing in both Hydraulics and Hydrology disciplines, are responsible for Review of Hydrological Studies and Hydraulic Designs for Hydro Power and Pump Storage Project components (Intake, Dam, Barrage, Energy dissipation arrangement, Spillway, Desilting Basin, HRT, Pressure Shaft / Penstock, Upstream Surge shaft and downstream Surge Chamber and Tail race system)and finalize the General Layout arrangements of the Projects. Understanding of technical specifications for Tender projects and Review of hydraulic design reports as per IS codes, CEA / CWC guidelines, CBIP and USBR Guidelines etc.