Volume 13, Issue 3 (10-2019)
مرتع 2019, 13(3): 461-475 |
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Eskandari Damaneh H, Eskandari Damaneh H, Khosravi H, Gholami H. Analysis and monitoring of drought using NDVI index (Case study: the west basin of Jaz Murian wetland). مرتع 2019; 13 (3) :461-475
URL: http://rangelandsrm.ir/article-1-785-en.html
URL: http://rangelandsrm.ir/article-1-785-en.html
Department of Arid and Mountains Regions Reclamation, Faculty of Natural Resources, University of Tehran, Karaj
Abstract: (4973 Views)
Drought is a recurrent and temporary natural occurrence causing a great damage to human life and natural ecosystems. In this research, the standardized precipitation index (SPI) was used to assess drought. For this purpose, monthly statistics of 15 meteorological station were used and SPI were calculated using MATLAB software in the Jazmourian wetland. Then, their maps were provided in different periods using ArcGIS software. The NDVI map was prepared using MODIS satellite imagery (MOD13A2) for the period of 2000-2015. Then correlation between them was studied by Pearson correlation coefficient. Based on the SPI results the highest droughts have occurred in 2007, 2008, 2009 and 2014. The results of Man-Kendal trend test at meteorological stations showed that there was a significant increase in Hoseinabad Salehabad station, while in other stations the trend was not significant. The NDVI trend has changed in different years. The classes of 0-0.1 and >0.4 have decreased during this time interval, but the classes of 0.1-0.2, 0.2-0.3, and 0.3-0.4 showed an increasing trend. According to the results of Pearson correlation coefficient, the highest correlation was found between SPI and NDVI at Miandeh, Dashtkoch and Cherigan stations and the lowest correlation was found in the stations of FathAbad Esfandaghe, Kahnak Shibani, Kerad Dalfard and Tang Sargaz.
Keywords: Meteorological Drought, NDVI Index, Pearson Correlation Coefficient, Man-Kendal Trend Test, Jazmourian Wetland.
Type of Study: Research |
Subject:
Special
Received: 2019/10/21 | Accepted: 2019/10/21 | Published: 2019/10/21
Received: 2019/10/21 | Accepted: 2019/10/21 | Published: 2019/10/21
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