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Hassan, Hassan, Yousefi, Elham, Gholinejad, Saeid. (1405). Monitoring Vegetation Cover Changes in the Darmian and Sarbisheh Protected Area Using Satellite-derived Vegetation Indices in Google Earth Engine Platform. , (), -. doi: 10.22077/jdcr.2026.10932.1213
Hassan Hassan; Elham Yousefi; Saeid Gholinejad. "Monitoring Vegetation Cover Changes in the Darmian and Sarbisheh Protected Area Using Satellite-derived Vegetation Indices in Google Earth Engine Platform". , , , 1405, -. doi: 10.22077/jdcr.2026.10932.1213
Hassan, Hassan, Yousefi, Elham, Gholinejad, Saeid. (1405). 'Monitoring Vegetation Cover Changes in the Darmian and Sarbisheh Protected Area Using Satellite-derived Vegetation Indices in Google Earth Engine Platform', , (), pp. -. doi: 10.22077/jdcr.2026.10932.1213
Hassan, Hassan, Yousefi, Elham, Gholinejad, Saeid. Monitoring Vegetation Cover Changes in the Darmian and Sarbisheh Protected Area Using Satellite-derived Vegetation Indices in Google Earth Engine Platform. , 1405; (): -. doi: 10.22077/jdcr.2026.10932.1213

Monitoring Vegetation Cover Changes in the Darmian and Sarbisheh Protected Area Using Satellite-derived Vegetation Indices in Google Earth Engine Platform

مجله پژوهش های خشکسالی و تغییراقلیم
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 20 تیر 1405
نوع مقاله: مقاله پژوهشی
شناسه دیجیتال (DOI): 10.22077/jdcr.2026.10932.1213
نویسندگان
Hassan Hassan1؛ Elham Yousefi* 2؛ Saeid Gholinejad3
1MSc in Land use planning, Department of environment, Faculty of natural resources and environment, University of Birjand, Birjand, Iran.
22- Associate Professor, Department of Environment, Drought and Climate Change Research Group, Faculty of Natural Resources and Environment, University of Birjand. Iran
33- Assistant Professor, Department of Surveying Engineering, Faculty of Civil and Surveying Engineering, Graduate University of Advanced Technology, Kerman, Iran.
چکیده
Drought is considered one of the most significant natural hazards in protected areas; therefore, monitoring its impacts on these regions can contribute substantially to their effective management. Accordingly, this study investigated drought trends in the Darmian and Sarbisheh Protected Area during the period 2000–2022 using satellite data within the Google Earth Engine platform. To this end, meteorological drought conditions were first assessed using climatic-meteorological variables, including the Standardized Precipitation Index (SPI) derived from CHIRPS and soil moisture from SMAP satellite. Subsequently, changes in vegetation cover were evaluated through time-series analysis of vegetation indices extracted from MODIS satellite imagery, including the Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Vegetation Condition Index (VCI), Temperature Condition Index (TCI), Vegetation Health Index (VHI), Standardized Vegetation Index (SVI). The Mann–Kendall test applied to the vegetation cover area time series indicated a statistically significant increasing trend(Z = 8.96, p < 0.001, τ = 0.27), while Sen’s slope estimated an average increase of 27.26 area units per observation over the study period. This increasing trend was also reflected in the vegetation index time series. The results indicated that, while the monthly SPI exhibited a decreasing trend and soil moisture showed a relatively stable trend, both suggesting an intensification of meteorological drought in the region, the vegetation indices displayed an relatively increasing trend. The significant differences observed between areas inside and outside the protected boundary confirm the effectiveness of conservation measures, such as restrictions on livestock grazing and control of human exploitation, in mitigating drought severity.
کلیدواژه‌ها
Darmian and Sarbisheh Protected Area؛ Drought؛ Satellite Images؛ Vegetation Index؛ Google Earth Engine (GEE)
آمار
تعداد مشاهده مقاله: 3


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