CHANGES OF RAINFALL-RUNOFF REGIME IN THE ŠUMAVA / BOHEMIAN FOREST REGION Abstract: The goal of this thesis is the evaluation of changes in rainfall-runoff regime in the Šumava region from time and spacial point of view. The thesis includes research and applied part. The research part is dedicated to the methods of evaluation of runoff changes and their possible causes in the Šumava region. In the applied part there is an analysis of precipitaion - runoff regime for long-term time series of average annual and monthly discharges and also annual and monthly precipitations for selected gauging stations in Czech, German and Austrian part of Šumava using absolute and relative homogenity tests and Mann - Kendall test for long-term trend. One of the main aims of this thesis is the identification of possible orographical effect or the difference between windward and leeward part of Šumava. In conclusion the achieved results are evaluated, discussed and compared with subject publications. Key words: absolute homogenity, Mann - Kendall test, runoff, discharge, relative homogenity, precipitation, trend, Šumava, changes

Relevance of the problem. Forest compartment under the conditions of intensive forestry is the main unit of management and inventory (Antanaitis, 1961; Franklin, 2001). Regular, every 10 years, standwise forest inventory requires great expenditures on compartment delineation and their depicting in cartographic material. Different executives, guided by the same standards, but without objective forest compartment delineation methodics, may divide one and the same object into compartments in different ways (Rutkauskas, Kenstavičius, 1978). Therefore, the variability of forest compartment boundaries is artificially increased. Under the absence of clear boundaries between compartments in the forest and considering that the whole forest is homogeneous, compartment characteristics are usually ascertained ignoring their peculiarities at the edges. This comprises preconditions for the appearance of systemic forest inventory deviations (Антанайтис и др., 1975; Kuliešis, Kasperavičius, 2000; Brassel, Lichke, 2001). The accuracy of cartographic material and the influence of deviations on estimation reliability of forest resources are not evaluated (Gemmell et al., 1991; Fish, 2000; Franklin, 2001). Compartment edges, occupying in the forests of the country almost one third of the whole area of stands, are important not only from inventory, but also from forest stand growing viewpoint. What are wood increment losses, or what additional increment may be obtained due to differing growth... [to full text]