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Rating Curve Development at Ungauged River Sites using Variable Parameter Muskingum Discharge Routing Method


A physically based simplified discharge routing method, namely, the variable parameter Muskingum discharge-hydrograph (VPMD) routing method, having the capability of estimating the stage hydrographs simultaneously in channels with floodplains is presented herein. The upstream discharge hydrograph is routed using this VPMD method in different two-stage symmetrical trapezoidal compound cross section channel reaches. The performance of the VPMD method is evaluated by numerical experiments using the benchmark MIKE11 hydrodynamic model and the field data of the Tiber River in central Italy. The proposed method is capable of accurately routing the discharge hydrographs, corresponding stage hydrographs and synthesizing the normal rating curves at any downstream ungauged river site which is not affected by any downstream effects. This study can be helpful for various planning and management of river water resources in both the diagnostic and prognostic modes.

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The authors thank the Umbria Region, CNR–IRPI Office of Perugia, Italy for providing the Tiber River data.

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Correspondence to Bhabagrahi Sahoo.

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Sahoo, B., Perumal, M., Moramarco, T. et al. Rating Curve Development at Ungauged River Sites using Variable Parameter Muskingum Discharge Routing Method. Water Resour Manage 28, 3783–3800 (2014).

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  • Hydrograph
  • Rating curve
  • Routing
  • Ungauged river
  • Variable parameter
  • VPMD routing method