Abstract
This paper presents the methodology of taking measurements of active surface energy balance components using the Bowen method. It discusses the applied measurement system, an important part of which are HMD 50U/50Y measurement sensors from Vaisala, adapted to work in the field. Their operation is a source of data for determining vertical profiles of temperature and water vapour pressure. These data are used to determine the turbulence components of the energy balance, i.e., sensible and latent heat. Measurements taken during the vegetative season on rape field showed that intensive evaporation occurred in the period until the end of June and that its decrease coincided with the decrease in the value of the degree of plant development determined on the basis of LAI records. In spring, during the period of intensive plant development, the decade sums of evaporation reached 30 mm, after which their quantities fell to the range of 10–15 mm. They became higher only in the periods of precipitation, when the water from the interception was available.
Highlights
Human development over the last several hundred years has had a strong impact on environmental changes, with agriculture leading to huge area changes
This paper presents the methodology of taking measurements of active surface energy balance components using the Bowen method
Measurements taken during the vegetative season on rape field showed that intensive evaporation occurred in the period until the end of June and that its decrease coincided with the decrease in the value of the degree of plant development determined on the basis of Leaf Area Index (LAI) records
Summary
Human development over the last several hundred years has had a strong impact on environmental changes, with agriculture leading to huge area changes. Rape is one of the most-grown plants, with worldwide crops of around 65–70 million tons. It is mainly used for the production of cooking oil, but it is a source of biofuel. Rapeseed is a winter crop, so it uses both the autumn and spring vegetation period, but it matures and dries up relatively quickly, which means that the field is often devoid of vegetation during the summer. It is very unfavourable from the point of view of the environment and agriculture. It was decided to follow the shaping of the components of the heat balance, including the evapotranspiration of rape during the growing season
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
