DATA-BASED MECHANISTIC MODELLING OF A SNOW AFFECTED BASIN

A precipitation-temperature-flow model is developed to compute flow from raw precipitation records, taking into consideration snow-melt contribution to the flow. The model does not require other measurements than flow, temperature and raw precipitation, thus resulting particularly useful in all those situations, the majority, where these are the only observed data. A Data-Based Mechanistic (DBM) modelling approach is used in order to keep at a minimum all the a-priori assumptions on the physical mechanism driving the flow formation process. The model has been applied on a classical set of data (the Jakulsa river basin, Iceland) which is well known in the non-linear modellers community.