Institute of Hydrology
Topic
The influence of different soil types on the process of dew formation on a standard grass surface
PhD. program
Year of admission
2024
Name of the supervisor
Ing. Milan Gomboš, CSc.
Contact:
Receiving school
Stavebná fakulta STU
Annotation
Dew is condensed water. It occurs on the surfaces of objects that have a surface temperature lower than the dew point temperature of the surrounding air. The dew point is created by isobaric cooling. At its temperature, the air becomes saturated without water vapor being supplied to it from the outside. When the temperature of the surface of the plant cover drops below the dew point temperature, water vapor condenses and thus dew occurs. Dew is considered one of the forms of water precipitation. It is captured by the soil surface and the interception capacity of the vegetation, from which it gradually evaporates. Plants cover different soil types. These have different heat capacity and thermal inertia. The water content in the soil, which is limited by the retention properties of the soil environment, has a decisive influence on these quantities. The topic of the proposed dissertation is based on the hypothesis that under the same hydrological and hydrometeorological conditions, the temperature of the vegetation will be different on different soil types. For this reason, it is assumed that the formation of dew will also be different. The aim of the proposed dissertation is to quantify the influence of different soil types on the formation of dew on a standard grass surface. The process of dew formation, its capture by interception capacity and the disappearance of dew by evaporation will be quantified on different soil types. In the course of the mentioned process, the volumes of condensed water will be evaluated.
To achieve the objectives of the work, the methods of water balance analysis based on lysimeter measurements will be used. Measurements of the individual components of the water balance will be carried out on five soil monoliths in the lysimeter station located in the Petrovce water node. Scientific significance:
a) New knowledge about the influence of the soil type on the formation of dew in the conditions of the East Slovak Lowland.
b) New knowledge about the importance of dew in the water balance of the territory with different soil cover.
c) New knowledge about the importance of dew in extremely dry growing seasons.
To achieve the objectives of the work, the methods of water balance analysis based on lysimeter measurements will be used. Measurements of the individual components of the water balance will be carried out on five soil monoliths in the lysimeter station located in the Petrovce water node. Scientific significance:
a) New knowledge about the influence of the soil type on the formation of dew in the conditions of the East Slovak Lowland.
b) New knowledge about the importance of dew in the water balance of the territory with different soil cover.
c) New knowledge about the importance of dew in extremely dry growing seasons.