Spatial and temporal changes in plant water supply obtained by NDVI in Tinja and Kozlica watersheds
| Autor: | Boitumelo Mohlala Day, Stričević Ruzica, Gregorić Enika, Zivotić Ljubomir |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Zemljište i biljka, Vol 71, Iss 2, Pp 45-64 (2022) |
| Druh dokumentu: | article |
| ISSN: | 0514-6658 2560-4279 |
| DOI: | 10.5937/ZemBilj2202120B |
| Popis: | Normalized Difference Vegetation Index (NDVI) is an indicator of vegetation health and land cover changes, based on the reflectance of certain ranges in the electromagnetic spectrum. Land use, seasons and climate changes affect spatial variations in NDVI values. This study focuses on the basins of the rivers Tinja and Kozlica, located on the Eastern parts of the Maljen Mountain, and characterized by the dominant presence of grassy vegetation. Spatial and temporal changes in plant water supply are monitored using 10-meter Sentinel-2 imagery, and further processed on a monthly basis in QGIS for 2020-2021. For better elaboration of NDVI values basins of these two rivers were delineated into 305 sub-basins, on which further analysis was performed. NDVI data during both years range from < 0.1 - > 0.6. NDVI values change during different seasons, which is consistent with the increase and decrease of water stress during the studied period, which refers to changes in weather conditions during the growing season. In the summer months, the highest values exceed 0.6, and in some cases even 0.8. NDVI values in October and November decrease to 0.3 and 0.5, while in winter months NDVI values are |
| Databáze: | Directory of Open Access Journals |
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