Monitoring the trend of vegetation changes one of the most important indicators of land degradation (in Ilam province)

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Nikpour Noorallah; NEGARESH HOSSEIN; FOTOOHI SAMAD; HOSSEINI SEYED ZEYNALABEDIN; BAHRAMI SHAHRAM

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Journal: Journal of Spatial Analysis Environmental Hazards Year:2019 | Volume:5 | Issue:4 Page(s): 21-48

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Title

Monitoring the trend of vegetation changes one of the most important indicators of land degradation (in Ilam province)

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Keywords

IlamQ1

land degradationQ1

trendQ2

classical linear regressionQ1

MODISQ2

NDVIQ2

Abstract

Deforestation or vegetation degradation is one of the main drivers of global earth changes, which has significant consequences in terms of ecosystem performance and biodiversity conservation. One of the ways for studying vegetation changes as the most important indicator of land degradation is remote sensing. In this study, in order to monitor the vegetation degradation trend in Ilam Province. After obtaining and preparing the required data (410 downloaded images) in the ArcGIS and Surfer software, the multiplication, mosaic and georeferencing operations are made. Converting format of images into ASCII is the next stage of the study. By converting this format, the total number of 953552 pixels is studied within the range; after removing the lost and negative values, 328042 pixels are analyzed. Besides, using parametric statistical method of the classical linear regression and programming in R software, the trend of slope variations and significance of slope variations of vegetations are obtained for the 17-year period (2000-2016). Results of this study show that the focus of the highest trend of declining slope variations (trend of negative slop variations) is in the NDVI index across the western half of the studied area and the focus of the highest trend of increasing slope variations (trend of positive slop variations) is in the NDVI index in the center and east. Significance of the trend of slope variations also approves this claim. Thus, the focus of the highest trend of slope variations (negative) in the west and southwest of the studied area along with the highest trend of slope variations (positive) in the center and east is significant at the probable level of 0. 05

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APA: Copy

Nikpour, Noorallah, NEGARESH, HOSSEIN, FOTOOHI, SAMAD, HOSSEINI, SEYED ZEYNALABEDIN, & BAHRAMI, SHAHRAM. (2019). Monitoring the trend of vegetation changes one of the most important indicators of land degradation (in Ilam province). JOURNAL OF SPATIAL ANALYSIS ENVIRONMENTAL HAZARTS, 5(4 ), 21-48. SID. https://sid.ir/paper/377966/en

Vancouver: Copy

Nikpour Noorallah, NEGARESH HOSSEIN, FOTOOHI SAMAD, HOSSEINI SEYED ZEYNALABEDIN, BAHRAMI SHAHRAM. Monitoring the trend of vegetation changes one of the most important indicators of land degradation (in Ilam province). JOURNAL OF SPATIAL ANALYSIS ENVIRONMENTAL HAZARTS[Internet]. 2019;5(4 ):21-48. Available from: https://sid.ir/paper/377966/en

IEEE: Copy

Noorallah Nikpour, HOSSEIN NEGARESH, SAMAD FOTOOHI, SEYED ZEYNALABEDIN HOSSEINI, and SHAHRAM BAHRAMI, “Monitoring the trend of vegetation changes one of the most important indicators of land degradation (in Ilam province),” JOURNAL OF SPATIAL ANALYSIS ENVIRONMENTAL HAZARTS, vol. 5, no. 4 , pp. 21–48, 2019, [Online]. Available: https://sid.ir/paper/377966/en

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