Intensive Flow Measurement and River Cross-Section Survey at Hydrological Stations

Intensive Flow Measurement and River Cross-Section Survey at Hydrological Stations

Project: Discharge Measurement & Cross-section Survey

Assignment: Intensive Flow Measurement and River Cross-Section Survey at Hydrological Stations

Location: Dharan District

Client: Office of Hydrology and Meteorology

Duration: July 2021 to July 2022

Project Description: The Department of Hydrology and Meteorology has planned to prepare station inventory for all its major stations which will include the cross-section properties at two or more sections so that the adequate information would be available for the extrapolation of rating curve. In this regard, OHM-Dharan has called for the proposals for Intensive Flow Measurement and River Cross-Section Survey at Hydrological Stations in response to which this Proposal is prepared.

Scope of Services:

1. Inception of the Assignment and Planning for Proposed Study Works
   • Collection and Review of Relevant Guidelines and Documents;
   • Kick-off meeting with the Client;
   • Desk Study of Project Area;
  • Planning for the proposed Study Works;
   • Preparation of Updated Work Plan and Methodology.
2. Field Data Collection
    • Identification of Benchmark Coordinates and Linking with Existing Staff Gauges;
   • River Cross-section Survey;
• Discharge Measurement;
   • Preparation of Overall Schedule and Frequency of Field Works;
   • Data Recording and Documentation.
3. Data Computation and Analysis
   • River Cross-section Mapping;
   • Manning’s Coefficient (n);
   • Parameters at 0.2 m interval up to 5 above HFL;
     o Cross-section Area (A)
     o Wetted Perimeter (P)
     o Hydraulic Radius (R)
     o Discharge (Q)
   • Plotting of Water Level;
   • Computation of Peak Flood Discharge;
   • Plotting of Stage-Discharge (Rating) Curve.