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      Using satellite-based evapotranspiration estimates to improve the structure of a simple conceptual rainfall–runoff model

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      Hydrology and Earth System Sciences

      Copernicus GmbH

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          Abstract

          <p><strong>Abstract.</strong> Daily, quasi-global (50°<span class="thinspace"></span>N&amp;ndash;S and 180°<span class="thinspace"></span>W&amp;ndash;E), satellite-based estimates of actual evapotranspiration at 0.25° spatial resolution have recently become available, generated by the Global Land Evaporation Amsterdam Model (GLEAM). We investigate the use of these data to improve the performance of a simple lumped catchment-scale hydrologic model driven by satellite-based precipitation estimates to generate streamflow simulations for a poorly gauged basin in Africa. In one approach, we use GLEAM to constrain the evapotranspiration estimates generated by the model, thereby modifying daily water balance and improving model performance. In an alternative approach, we instead change the structure of the model to improve its ability to simulate actual evapotranspiration (as estimated by GLEAM). Finally, we test whether the GLEAM product is able to further improve the performance of the structurally modified model. Results indicate that while both approaches can provide improved simulations of streamflow, the second approach also improves the simulation of actual evapotranspiration significantly, which substantiates the importance of making <q>diagnostic structural improvements</q> to hydrologic models whenever possible.</p>

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          The TRMM Multisatellite Precipitation Analysis (TMPA): Quasi-Global, Multiyear, Combined-Sensor Precipitation Estimates at Fine Scales

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            An Approach toward a Rational Classification of Climate

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              On the Assessment of Surface Heat Flux and Evaporation Using Large-Scale Parameters

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                Author and article information

                Journal
                Hydrology and Earth System Sciences
                Hydrol. Earth Syst. Sci.
                Copernicus GmbH
                1607-7938
                2017
                February 14 2017
                : 21
                : 2
                : 879-896
                10.5194/hess-21-879-2017
                © 2017

                https://creativecommons.org/licenses/by/3.0/

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