Klímaváltozás szempontú, multispektrális monitoring mezőgazdasági- és erdőterületeken

Abstract

In this study a new remote sensing indexes was introduced. They were calculated from the Terra satellite's MODIS sensor surface reflectance data using visible red, near-infrared and short-wave-infrared spectral bands. The following spectral indices were examined: Difference Vegetation Index (DVI), Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Difference Water Index (DWI), Normalized Difference Water Index (NDWI), Difference Drought Index (DDI) and Normalized Difference Drought Index (NDDI). The Difference Drought Index was proven applicable in quantifying the effects of climate change; f.i. drought intensity. However, after comparison with reference data NDWI performed better than the other indices examined in this study, the water indices are more sensitive to changes in drought conditions than the vegetation ones. All the available MODIS satellites images have to be processed in order to extract large enough information to forecast droughts in short term in Hungary