Hydrologic effects of evapotranspiration representation in a Richards equation based distributed hydrologic model at the catchment scaleEvapotranspiration (ET) is a key water budget term that is rarely evaluated in hydrologic modeling due to the scarcity of observed actual ET fluxes. However, the ET process representation within a hydrologic model is important as it affects the simulated hydrologic response. We illustrate how different ET representations affect both the hydrograph and the soil moisture states within MODHMS, a Richards' equation based distributed hydrologic model at the catchment scale. The ET process representation is important for adequately representing soil saturation areas, lateral flow and drying of the upslope areas of the catchment as well as the outflow hydrograph.
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Related research - Constructing a hydrologic hypothetical reality
The scarcity of observed hydrologic states and the scale discrepancies between point measurements and simulations are some of the most important challenges for evaluating the hydrology of a catchment and the usefulness of a model to represent that hydrology. The hypothetical reality represents a computer generated dataset using a complex hydrologic model designed to emulate the hydrologic behavior of a real catchment.. Where to find data... |