VEGETATION COVER CHANGE DURING 25 YEARS, CASE OF LAR DAM BASIN

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MOUSAVI S.A.R.; FARAHPOUR MAHDI; SHOKRI MARYAM; SOLEYMANI KARIM; GOUDARZI MAHMOUD

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Journal: IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH Year:2006 | Volume:13 | Issue:3 (24) Page(s): 186-200

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Title

VEGETATION COVER CHANGE DURING 25 YEARS, CASE OF LAR DAM BASIN

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Keywords

VEGETATION COVER DENSITYQ3

LANDSAT 7 ETM++Q3

CLASSIFICATIONQ3

CHANGE DETECTIONQ2

LAR DAM BASINQ3

Abstract

Landsat 7 ETM+ satellite data of 2002 versus vegetation cover map of 1976 were used to: 1- assess the capability of satellite data to prepare vegetation cover classes map and 2- study the vegetation changes trend in an area of about 26858.6 ha in LAR DAM BASIN. Field Sample spots were defined after accomplishing necessary corrections of satellite images. Suitable band compositions were selected by considering the Optimum Index Factor (OIF), correlation matrix, Principal Components Analysis (PCA) and 2-dimensional diagram analysis. These compositions were classified using Maximum Likelihood, Minimum Distance and Box Classifier algorithms and then Majority Filter was used. Accuracy of resulted maps was evaluated by pixel to pixel method. Then Overall Accuracy Coefficient and Kappa Index were calculated. The map resulted from CLASSIFICATION of band composition 123457 through Maximum Likelihood and Majority Filter was selected as the vegetation cover map of 2002. Vegetation cover map of 1976 prepared by Asgari-khah (1977) via field survey was used as "vegetation cover classes" map of that year. Then the changes happened in each class were assessed by operation of cross function on the mentioned maps. Due to complexity of initial classes, more homogenous classes were merged resorting to more detectable maps having only four classes. Overall Accuracy Coefficient of final map was promoted by using these classes. Then the changes happened during 1976-2002 were detected. The results showed that 28.55% of total area which was covered by rangeland vegetation types in 1976, is unchanged, 14.03% is dropped into lower and 57.42% into higher classes. The map of vegetation cover changes was produced, finally.

Cites

DETERMINATION OF OPTIMUM VEGETATION INDICES FOR VEGETATION COVER PERCENTAGE MODELLING, USING SATELLITE SPECTRAL REFLECTANCE

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APA: Copy

MOUSAVI, S.A.R., FARAHPOUR, MAHDI, SHOKRI, MARYAM, SOLEYMANI, KARIM, & GOUDARZI, MAHMOUD. (2006). VEGETATION COVER CHANGE DURING 25 YEARS, CASE OF LAR DAM BASIN. IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH, 13(3 (24)), 186-200. SID. https://sid.ir/paper/106856/en

Vancouver: Copy

MOUSAVI S.A.R., FARAHPOUR MAHDI, SHOKRI MARYAM, SOLEYMANI KARIM, GOUDARZI MAHMOUD. VEGETATION COVER CHANGE DURING 25 YEARS, CASE OF LAR DAM BASIN. IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH[Internet]. 2006;13(3 (24)):186-200. Available from: https://sid.ir/paper/106856/en

IEEE: Copy

S.A.R. MOUSAVI, MAHDI FARAHPOUR, MARYAM SHOKRI, KARIM SOLEYMANI, and MAHMOUD GOUDARZI, “VEGETATION COVER CHANGE DURING 25 YEARS, CASE OF LAR DAM BASIN,” IRANIAN JOURNAL OF RANGE AND DESERT RESEARCH, vol. 13, no. 3 (24), pp. 186–200, 2006, [Online]. Available: https://sid.ir/paper/106856/en

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