Investigating the possibility of monitoring the drying in the upper soil layer by means of a drone in the Dobruja region

The possibility of monitoring the moisture in the upper soil layer by means of an unmanned aerial vehicle (UAV) was investigated. The dynamics of change of NDWI index according to data from terrestrial weather stations was determined. The dependencies between the various factors were analyzed. The moisture content of the topsoil shows a good correlation with the data obtained from the NDWI index. Through regression analysis, the tendency of the dependence of the NDWI index on meteorological data has been proven, as well as which of the factors have significance in the regression model.