ANALYSIS OF RIVER FLOW DATA TO DEVELOP STAGE-DISCHARGE RELATIONSHIP

Jinet Das, Akshay Chaudhary

Abstract: For investigation and design of river valley projects, assessment of the water resources potential of river basins and peak discharge is to be made. For these, the collection of daily discharge data is necessary. But direct measurement of daily discharge in a number of points in all streams is not only prohibitive in cost, but also very much time consuming, which can be best achieved by using stagedischarge relationship. In the present work, field data of three gauging sites, i.e. Theni (Basin: Mahanadi to Kanyakumari), Pingalwada (Basin: Mahi, Sabarmati and others) and Ghatsila (Basin: Subarnarekha, Burhabalang & Baitarni) were analysed to develop the steady-state stagedischarge relationship. Stage and Discharge data with the time of the gauging stations were available. Erroneous values were identified by comparative examination of the stage-hydrograph and discharge-hydrograph plotted one above the other. These values were rectified before developing stage-discharge equations.

Keywords: Basins, Discharge, Gauge, Hydrograph, Rating curve and Stage

DOI: https://doi.org/10.15623/ijret.2014.0302014