| Název článku: | Vliv transpirace porostů na vnitrodenní průtok v recipientu zalesněného mikropovodí v pahorkatinné oblasti v bezesrážkových periodách |
|---|---|
| Číslo: | 4 |
| Rok: | 2017 |
| Autor: | Petr Kupec, Jan Deutscher |
Studies focused on diurnal changes of streamflow in forest recipients are presently used as one of the possibilities how to understand landscape hydrological processes, and most importantly also for the assessment of the influence of climate and land use changes on landscape ecosystems. Wide research focused on gathering the basic parameters of the water balance (precipitation characteristics, forest stand transpiration characteristics, recipient streamflow characteristics and soil moisture characteristics) was conducted in the area of experimental forested microwatershed Kanice located in the territory of Forest Training Enterprise Masarykův les Křtiny (Czech Republic). The main goal of the research was to clarify the proportional relation between the forest stand transpiration and the amount of water in the recipient channel. Mentioned relation was evaluated within defined several days lasting precipitation-free periods in order to minimize the potential influence of precipitation on considered relation. Obtained results identified the forest stand transpiration as the most significant factor influencing the recipient streamflow under these conditions. The recipient streamflow declines during the day and its growth during the night up to the initial point before the decline start were observed in coincidence to forest stand transpiration diurnal course. Average amplitude of streamflow decline reached 18% of the initial morning value. Delay of approximately two hours was observed between the recipient streamflow decline and the forest stand transpiration increase. Relatively low amplitude of the recipient streamflow decline during the precipitation-free periods shows strong ability of forest vegetation to stabilize recipient streamflow within the dry periods.
