A "the best model" for all ...

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A "the best model" for all purposes does not exist. It always depends on many factors, above all on the goal and purpose of your study, as already mentioned. Besides that, other factors that narrow your search down, are the targeted temporal scale/resolution, available data (e.g. for catchment description, calibration, validation), spatial scale of your study site (global, regional, catchment scale, slope scale, microscale). These aspects should bring you closer to answering the question which TYPE OF MODEL and, in a next step, which model to choose. One reference that helped a lot to "orientate" in this field, was Beven (2012), "Rainfall-Runoff Modelling", 2nd Ed. Also, you may want to check the U.S. Army Corps of Engineers: The Hydrologic Engineering Center (HEC) developed a series of free products on hydraulic modelling, hydrologic modelling etc.