استخدام الأدلة (NDVI)‎ (NDWI)‎ و (NDBI)‎ لكشف التغيرات في غطاء الأرض لمناطق مختارة من محافظة النجف للحقبة بين (2001-2006)‎ باستخدام بيانات الاستشعار عن بعد

الملخص EN

Remote sensing data are primary sources extensively used for change detection in recent decades.

In this research many techniques have been selected for change detection , Normalized Difference Vegetation Index (NDVI), Normalized Difference Built up Index ( NDBI), Normalized Difference Water Index ( NDWI), and method of comparison after classification to represent three major land cover classes, built-up land, water bodies , and vegetation, respectively.

To make the change analysis of the study area , two images from the satellite Landsat ( ETM+) 2001 and 2006 are using.

Bands 2,3,4 and 5 have been extracted for each band for calculating the indexes NDVI , NDBI and NDWI.

Land cover classification has been performed using unsupervised procedure.

The main objective of the present paper is to analyse nature of land use land cover changes .

As a result, the spectral signatures of the three land-cover classes are more distinguishable in the new image than in the original seven-band image as the spectral clusters of the classes are well separated .

Therefore , the technique is effective and reliable.