Application of Different Structures of HBV Model to Studying Runoff Formation Processes: Case Study of Experimental Catchments

The article presents the experience in the application of a hydrological conceptual model HBV, including its standard version and modifications, to studying runoff-formation processes on small experimental catchments in the upper reaches of the Ussuri R. based on field observation data in the warm seasons from 2012 to 2019. It was shown, that, in many cases, whatever the structure of the model, the quality of calculations was satisfactory, and the flood events were simulated with a high quality. All versions of the HBV model used in the study have been found to have drawbacks, either common or individual. The difference between the structures of the model and their effect on the estimated runoff in the outlet section has been demonstrated. Against to the standard version of HBV with two storages, the three storages version has not improved the efficency of runoff modeling. The standard structure of HBV was found to be optimal in terms of agreement with the natural processes of runoff formation and the quality of runoff simulation in small mountain rivers.