mRM - multiscale Routing Model for Scale-Independent Streamflow Simulations - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Conference Poster Year : 2016

mRM - multiscale Routing Model for Scale-Independent Streamflow Simulations

Abstract

Routing streamflow through a river network is a basic step within any distributed hydrologic model. It integrates the generated runoff and allows comparison with observed discharge at the outlet of a catchment. The Muskingum routing is a textbook river routing scheme that has been implemented in Earth System Models (e.g., WRF-HYDRO), stand-alone routing schemes (e.g., RAPID) , and hydrologic models (e.g., the mesoscale Hydrologic Model - mHM). Two types of implementations are mostly used. In the first one, the spatial routing resolution is fixed to that of the elevation model irrespective of the hydrologic modeling resolution. This implementation suffers from a high computational demand. In the second one, the spatial resolution is always applied at the hydrologic modelling resolution. This approach requires a scale-independent model behaviour which is often not evaluated. Here, we present the multiscale Routing Model (mRM) that provides a flexible choice of the routing resolution independent of the hydrologic modelling resolution. It incorporates a triangular unit hydrograph for overland flow routing and a Muskingum routing scheme for river routing. mRM provides a scale-independent model behaviour by exploiting the Multiscale Parameter Regionalisation (MPR) included in the open-source mHM (www.ufz.de/mhm). MPR reflects the structure of the landscape within the parametrisation of hydrologic processes. Effective model parameters are derived by upscaling of high-resolution (i.e., landscape resolution) parameters to the hydrologic modelling/routing resolution as proposed in Samaniego et al. 2010 and Kumar et al. 2013. mRM is coupled in this work to the state-of-the-art land surface model Noah-MP. Simulated streamflow is derived for the Ohio River (≈~525 000 km^2) during the period 1990-2000 at resolutions of 0.0625.
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Dates and versions

hal-02740947 , version 1 (03-06-2020)

Identifiers

  • HAL Id : hal-02740947 , version 1
  • PRODINRA : 439220

Cite

Stephan Thober, Rohini Kumar, Luis Samaniego, Julian Mai, Oldrich Rakovec, et al.. mRM - multiscale Routing Model for Scale-Independent Streamflow Simulations. EGU, European Geosciences Union General Assembly 2016, Apr 2016, Vienne, Austria. , 2016. ⟨hal-02740947⟩

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