تقدير الإنتاجية النباتية من الوزن الجاف لمراعي بادية السويداء (سورية)‎ باختلاف مستوى معالجة الصورة الفضائية Landsat8

الملخص EN

The research aims to Sudy rangeland dry matter productivity e^imated from LandSat8 -Normalized Difference Vegetation Index (NDVI) using different levels of satellite image processing, for AL-Sweeda Badia in Syria, during April, May and June of 2015.

NDVI was calculated according to the digital number values, followed by the top of atmosphere values, and finally the Ground Surface values after conducting the Atmospheric Correction.

The relationship between plant dry matter productivity and NDVI values of each level of image processing was concluded and then applied for estimating plant productivity and formulating productivity maps for the study area.

The results were compared.

The raw satellite images with digital number values contained geometric distortions caused by topography, climate, sensor speed-height changing and atmosphere rays refraction.

The same was for the top of atmosphere level, however ground surface level values after conducting atmospheric correction was found to be good in rangeland Satue foreca^ing and plant dry matter productivity e^imation, unlike the previous two levels of image processing.