The presented diploma thesis describes dead wood in forest ecosystems and its influence on runoff. It describes in detail the measurement of precipitation runoff in the case of dead and dry deciduous wood along the contour at 1% slope under laboratory conditions using irrigation tests.Subsequently, it deals with the evaluation of tests with different coverage and the intensity of precipitation of processed data obtained from laboratory measurements and the subsequent comparison of these data with each other.At the end of the work, the runoff rate is evaluated depending on the coverage and intensity of precipitation. It also discusses the possible reasons for the impact on water runoff in the ecosystem. It also discusses the issue of wood surface properties and the ability of liquids to wet the surface of a solid.From the measured data, we can clearly state that the most significant difference in runoff was shown between the coverage of 5% and 30%, in favor of the coverage of 30%. We also came to the conclusion that the surface runoff was the slowest at 5% coverage of the area with dead wood and at 15% coverage of dead wood. This may be due to the fact that the wood used during the research was dry and due to less resistance and greater hydrophilicity, the movement of water was easier. The substrate, which was formed by sheet metal, which is a hydrophobic material, also played a role.