A retrospective on hydrological catchment modelling based on half a century with the HBV model

Abstract. Hydrological catchment models are important tools that commonly used as the basis for water resource management planning. In 1960s and 1970s, development of several relatively simple to simulate runoff started, a number so-called conceptual (or bucket-type) were suggested. these models, complex heterogeneous hydrological processes in represented by limited storage elements fluxes between them. While computer limitations major motivation such early days, some still frequently despite vast increase computational opportunities. The HBV (Hydrologiska Byråns Vattenbalansavdelning) model, which was first applied about 50 years ago Sweden, is typical example model has gained large popularity since its inception. During intercomparisons, performed well because of) structure. Here, history development, from thoughtful considerations different structures modelling studies using hundreds catchments cloud computing facilities, described. Furthermore, wide range applications discussed. aim provide an understanding background addressing balance complexity data availability will also face hydrologists coming decades.