INVESTIGATING VEGETATION OF SALINE LANDS AROUND URMIA LAKE USING SATELLITE IMAGES

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AHMADI A.; TATIAN M.R.; TAMRTASH R.; YEGANEH H.; ASRI Y.

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Journal: Journal of RS and GIS for Natural Resources Year:2016 | Volume:7 | Issue:1 Page(s): 1-12

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Title

INVESTIGATING VEGETATION OF SALINE LANDS AROUND URMIA LAKE USING SATELLITE IMAGES

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Keywords

BACKWARDS ELIMINATIONQ1

MULTIPLE REGRESSIONQ2

RANGELANDQ2

VEGETATION INDICESQ2

Abstract

Rangeland is one of valuable renewable resources that has a special place in national development programing in many countries. This study aims to survey vegetation of saline lands around Urmia lake using satellite images in 2014. This study was conducted in the area about 353150 hectares in saline lands around Urmia lake. In this study, various pre-processings including geometric correction using topographic maps and atmospheric correction using dark object subtraction method were utilized. Field data were collected in 2014. Sampling was done in plant units with stratified random sampling method. In this study, MULTIPLE REGRESSION was used to examine the relationship between variables. In this model, the presence or absence of collinearity between the independent variables (vegetation indices and bonds) was first studied by calculating the correlation matrix. In this study, the best model was chosen due to higher value of R2.Considering the selected model, several variables have been chosen from all the independent variables and have been introduced as the most important factors in determining the vegetation map of the study area. Finally, the produced maps and sampling points were controlled in order to validate the accuracy of results. The results showed that the indices of MIRVI, PD312, PD322, TVI, VNIRI, INFRARED, MID-IRINDEX and bounds of B2, B3, B5, B6 have significant correlations at the 5% level with the field data and using backward regression models, the vegetation map was estimated.According to the results, much of saline land around Urmia lake has 0-20% vegetation; therefore, we concluded that the RANGELANDs in the region are not in good conditions.

Cites

STUDYING THE EFFECT OF DUST ON VEGETATION CHANGES (CASE STUDY: SHADEGAN WETLAND, KHUZESTAN)

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APA: Copy

AHMADI, A., TATIAN, M.R., TAMRTASH, R., YEGANEH, H., & ASRI, Y.. (2016). INVESTIGATING VEGETATION OF SALINE LANDS AROUND URMIA LAKE USING SATELLITE IMAGES. JOURNAL OF RS AND GIS FOR NATURAL RESOURCES (JOURNAL OF APPLIED RS AND GIS TECHNIQUES IN NATURAL RESOURCE SCIENCE), 7(1), 1-12. SID. https://sid.ir/paper/189610/en

Vancouver: Copy

AHMADI A., TATIAN M.R., TAMRTASH R., YEGANEH H., ASRI Y.. INVESTIGATING VEGETATION OF SALINE LANDS AROUND URMIA LAKE USING SATELLITE IMAGES. JOURNAL OF RS AND GIS FOR NATURAL RESOURCES (JOURNAL OF APPLIED RS AND GIS TECHNIQUES IN NATURAL RESOURCE SCIENCE)[Internet]. 2016;7(1):1-12. Available from: https://sid.ir/paper/189610/en

IEEE: Copy

A. AHMADI, M.R. TATIAN, R. TAMRTASH, H. YEGANEH, and Y. ASRI, “INVESTIGATING VEGETATION OF SALINE LANDS AROUND URMIA LAKE USING SATELLITE IMAGES,” JOURNAL OF RS AND GIS FOR NATURAL RESOURCES (JOURNAL OF APPLIED RS AND GIS TECHNIQUES IN NATURAL RESOURCE SCIENCE), vol. 7, no. 1, pp. 1–12, 2016, [Online]. Available: https://sid.ir/paper/189610/en

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