Drought impacts on rangeland vegetation cover with an emphasis on remote sensing indices (Case Study: Salafchegan – Neizar Watershed)

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Vaisi V.; GHAVAM M.; BAZRAFSHAN O.

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Paper Information

Journal: IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH Year:2019 | Volume:26 | Issue:3 (76) Page(s): 704-716

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Information Journal Paper

Title

Drought impacts on rangeland vegetation cover with an emphasis on remote sensing indices (Case Study: Salafchegan – Neizar Watershed)

Author(s)

Vaisi V. | GHAVAM M. | BAZRAFSHAN O. | Issue Writer Certificate

Keywords

Drought monitoringQ1

satellite imagesQ1

vegetation indexQ1

Landsat imagesQ1

rangelandQ2

Abstract

rangeland vegetation is one of the most important components of arid ecosystems and it is necessary to determine changes in rangeland vegetation under drought and wet years. The present study aimed to investigate the relationship between satellite indices and SPI index in Qom rangelands. For this purpose, the SPI index was calculated in moving averages of 1, 3, 5 and 7 years. In the next step, using Landsat images and after making the necessary adjustments to the images, the vegetation map was prepared using NDVI, MSAVI and EVI indices. Finally, correlation coefficients were used to investigate the relationship between satellite image indices and SPI index. The results showed a moderate and good correlation between MSAVI satellite indices and SPI index at peak vegetation growth months with a one month moving average of SPI index. The results of this study show that to estimate agricultural drought through remote sensing, the MSAVI index is a very suitable method and can be used for estimating drought in areas where meteorological stations are scattered (or nonexistent). Because the number of sampling points in satellite images is far greater than the number of meteorological stations.

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APA: Copy

Vaisi, V., GHAVAM, M., & BAZRAFSHAN, O.. (2019). Drought impacts on rangeland vegetation cover with an emphasis on remote sensing indices (Case Study: Salafchegan – Neizar Watershed). IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH, 26(3 (76) ), 704-716. SID. https://sid.ir/paper/360033/en

Vancouver: Copy

Vaisi V., GHAVAM M., BAZRAFSHAN O.. Drought impacts on rangeland vegetation cover with an emphasis on remote sensing indices (Case Study: Salafchegan – Neizar Watershed). IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH[Internet]. 2019;26(3 (76) ):704-716. Available from: https://sid.ir/paper/360033/en

IEEE: Copy

V. Vaisi, M. GHAVAM, and O. BAZRAFSHAN, “Drought impacts on rangeland vegetation cover with an emphasis on remote sensing indices (Case Study: Salafchegan – Neizar Watershed),” IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH, vol. 26, no. 3 (76) , pp. 704–716, 2019, [Online]. Available: https://sid.ir/paper/360033/en

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