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Conclusions• A priori estimation of parameters related to land-atmosphere interactions, i.e. soil and vegetationsystem, was proposed using GIS analysis.• The parameter estimation method was applied to twokinds of basin-wide hydrologic models (low flow &flood runoff), each of which has distinct features witheach other. Both the results were very successful inforested mountainous watersheds in Japan.• The above points suggest that the parameterestimation method proposed here is expected to havesome generality in a meteo-hydrologic area.