ORGANIZING AN EXPERIMENT TO MEASURING ILLUMINATION WITHIN THE FRAMEWORK OF A PROJECT TO CREATE A DIGITAL TWIN OF A LOCAL FOREST AREA

The objective of this study is to conduct an experiment to measure the light level in forest litter. To accomplish this objective, it is essential to undertake a series of tasks, including the determination of the measurement methodology, the conduct of the illuminance measurement itself, and the digitization and analysis of the obtained results. In accordance with the methodology selected, measurements were conducted at an elevation of 1.3-1.5 meters above the tops of the undergrowth. A MEGEON luxmeter, with an accuracy of ±5%, was utilized. In the course of preparation, two tracks comprising 39 and 42 points, respectively, were laid within the study area. It was determined that in excess of 90% of solar radiation is obstructed by tree crowns. Although the values of relative illuminance exhibited considerable variation at different points, the mean readings ranged from 1.6 to 9.9%, indicating a high degree of shading. The formation of forest tiers is related to a multitude of factors, and a definitive answer cannot be obtained without considering the diversity of ecotopes and the characteristics of forest stands. In optimal conditions, the development of the lower tiers is constrained solely by the light generated by the upper tier. Forest illumination exerts a pivotal influence on the survival and growth of the undergrowth, understorey, and herbaceous-shrub layer. Gaining insight into the impact of forest composition and structure, in addition to silvicultural practices, on light levels can prove beneficial for the management of plantations, with the aim of fostering more conducive conditions for tree and understorey growth.