Geomorphometrical mapping of relief-dissection using GIS

Abstract

In this project we have made an attempt to find out the limits of GIS in morphometrical analysis. The aim is not only to produce and analyse a vertical relief-dissection map, but we wish to point out the regional differences in erosion and its translocation in a geological scale. According to our idea, the vertical relief-dissection map (i.e. negative relict surface) can be constructed for each stream order by subtracting the real surface from the summit planes fitting on the watersheds. Such maps can give information about long-term translocations of erosion and about the changes of its rate. The mapping of vertical relief-dissection is based on morphometrical analyses of the 70‘s, but as there where no suitable methods it was carried out only under limited conditions. The surface modelling of GIS has opened a new way in this direction.