کلید واژگان

The face of the earth is always changing due to human activities and natural phenomena. Therefore
to optimize the management of the natural areas
knowledge of the trend
extent and estimation of land cover / use changes is considered necessary. Reviewing these changes through satellite images and evaluating their potential through modeling can help environmental planners and natural resource managers to make more inf
quantitative detection and evaluation of changes in vegetation were performed in the areas with combat desertification projects
Shahdad
Bam and Garmsar in Iran
during a 30-year period within 1987
2002 and 2017. The Normalized Difference Vegetation Index (NDVI) and land use maps were produced using the Enhanced Thematic Mapper Plus (ETM+)
Thematic Mapper (TM) and Operational Land Imager (OLI) satellite images in the three corresponding periods for the vegetation/non-vegetation
and agricultural lands. The Kappa coefficient of 0.83 to 0.86
0.91 to 0.92
and 0.94 to 0.95 was calculated for 1987
2002
and 2017 respectively
and the total accuracy was between 88 and 97. After providing the land use maps in different years
the monitoring of land use changes was investigated using the Change Detection method. According to the trend of changes during the periods
the results exhibited that the vegetated lands in these three areas had an increasing trend in average 31.33%
and the non-vegetated lands were turned to vegetated lands over time. In other words
they have declined by an average of 35%. Moreover
an increasing trend was found for the agricultural lands during the periods in average 4%. Eventually
the cost-effectiveness of projects implemented in the studied areas was calculated

تاریخ نشر

2021-01-01
1399-10-12

ناشر

University of Guilan