Conceptual hydrological models use different approaches to simulate spatially distributed snow accumulation and ablation of snow and ice. To validate their effectivity, appropriate data of accumulation and ablation are necessary. At Vernagtferner such a dataset is available und was used in this work to test and to compare the Simulation of accumulation and ablation of two models of different complexity. It became apparent that the assumption of increasing snow accumulation in higher elevations correlates well with the measured data. Using slope and curvature as additional criteria for distribution also produces visible dependencies to snow accumulation. The differentiation of ablation into simple exposition classes shows clearly less correlation with measured ablation than an approach which considers potential clear sky solar radiation for melt simulation.
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