استخدام بعض الأدلة الخضرية الطيفية من منتجات صور MODIS الفضائية لدراسة الجفاف في شمال غربي سورية للفترة الزمنية 2016-2000

الملخص EN

In recent years, Syria has experienced successive drought.

The drought phenomenon is one of the main challenges affecting development.

The impact of drought can be seen in all activities, especially agricultural, economic and social This study was based on MODIS images, the Enhanced Vegetation Index EVI and the Leaf area index LAI were used to determine the agriculture drought on the vegetation cover in northwest of Syria (Lattakia, Tartous, Hama, Edleb and Aleppo) for the period 2000 to 2016.

The LAImr drought index was derived from the ratio of LAI for each year to the LAI average for the entire period and divided into four classes of drought impact.

The results showed that 2003, 2015 were the least affected years by the drought, The percentage of unaffected lands by drought was 97.51%, 97.60% respectively of the total area studied, and 2008 was the most affected year by the drought The percentage of unaffected class by drought was 36.07% of the total area.

The correlation of the LAImr index with the precipitation quantity for the season and the SPI was strong and positive, significant at both levels of significance 0.05 and 0.01, (r = 0.74 ** with precipitation for the season and r = 0.73 * * with SPI), superior to LAI and EVI as they were strong but significant only at 0.05 level Indicates the efficacy of the LAImr index in the drought study.