Özet:

In this study, MODIS NDVI data with 16-day temporal and 250-m spatial resolution, computed using red and near-infrared band are used. Two classes, namely agricultural lands with high biomass activity and nonagricultural lands (bare areas, water mask and damaged fields) using ISODATA method in unsupervised classification based on the GIS are defined. The methods and data used in this study are commonly used in scholarly works abroad and in the analyses of drought. However, their usage by Turkish institutions and organizations is almost non existent. Therefore, this study tests both the promotion of these images’ areas of usage and their reliability. Kızıltepe district of Mardin city is chosen as the field of study in order to test the satellite images. As an important plain in Turkey and having seen a rapid agricultural change after the 1990s, Kızıltepe has shifted to the system of double cropping in the same year together with the irrigated agriculture. Maize and wheat sowing gain intensity at the end of June and beginning of July after the harvesting of winter wheat. Thus, the MODIS NDVI satellite images used in this study clearly reflects the change of agricultural structure in Kızıltepe. Considering the results obtained from these images, agricultural lands with high biomass activity which was about 41,000 hectares in August 2001 have risen up to 72,000 hectares in 2006 in parallel to the proliferation of irrigated agriculture and up to 83,000 hectares in 2011. But the agricultural lands with high biomass activity are about 2,000 ha in 2001, 3,200 ha in 2006 and only 760 ha when the wheat harvesting is completed in June in these years respectively.

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