AN INVESTIGATION OF THE CAPABILITY OF MULTI-TEMPORAL DATA OF LANDSAT 7 SATELLITE IN ESTIMATING VEGETATION COVER AND PRODUCTION (CASE STUDY: ARID REGION, SAVEH, BAKHSHALI-NEMATI)

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FARZADMEHR J.; ARZANI HOSSEIN; NAZARI SAMANI A.A.

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Journal: IRANIAN JOURNAL OF NATURAL RESOURCES Year:2005 | Volume:58 | Issue:3 Page(s): 719-729

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Title

AN INVESTIGATION OF THE CAPABILITY OF MULTI-TEMPORAL DATA OF LANDSAT 7 SATELLITE IN ESTIMATING VEGETATION COVER AND PRODUCTION (CASE STUDY: ARID REGION, SAVEH, BAKHSHALI-NEMATI)

Author(s)

FARZADMEHR J. | ARZANI HOSSEIN | NAZARI SAMANI A.A. | Issue Writer Certificate

Keywords

LANDSAT7Q4

ETM++Q4

VEGETATION COVERQ4

TOTAL YIELDQ2

REMOTE SENSINGQ4

SPECTRAL REFLECTANCEQ4

VEGETATION INDICESQ3

SAVEHQ4

Abstract

Using VEGETATION INDICES (VI) for an inventory of natural ecosystem has been developed over the past decades. Also these VIs have been observed to have a suitable correlation with vegetation parameters. However, to apply VI over a continuous span of time some considerations should be taken into account. In order to study the capability of multi-temporal Landsat 7 (ETM+) data in estimating vegetation parameters, different year images in a steppe region in Markazy Province were used. Information of regarding canopy cover and production of different vegetation forms were collected through 60 2×2 plots.Geometric correction of satellite images was conducted through ground control points with an RMSE of less than 0.5 pixel. Then to eliminate the effects of looking geometric situation as well as to make photography situation in different years uniform, radiometric correction was conducted, and digital number of each pixel converted into SPECTRAL REFLECTANCE. In the next stage, appropriate VI for arid regions and atmospheric correction VI in sample plots were assessed on the basis of SPECTRAL REFLECTANCE. Results of correlation survey between VI and vegetation parameters indicated that ETM+5, ETM+7 bands as well as TSAVII, GEMI and ARVI indices are in significant correlation with canopy as well as with production in different vegetation forms. Among VIs, GEM! exhibits the highest coefficients, of 0.43, 0.59, 0.63, and 0.55, for grass cover, shrub cover and total VEGETATION COVER as well as for production respectively. According to the results in this research this conclusion can be drawn that using SPECTRAL REFLECTANCE of multi temporal data to estimate vegetation canopy cover and yield in arid regions can yield more acceptable results. Employment of atmospheric correction indices (GEMI) to decrease changes in atmospheric conditions in different years is necessitated.

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APA: Copy

FARZADMEHR, J., ARZANI, HOSSEIN, & NAZARI SAMANI, A.A.. (2005). AN INVESTIGATION OF THE CAPABILITY OF MULTI-TEMPORAL DATA OF LANDSAT 7 SATELLITE IN ESTIMATING VEGETATION COVER AND PRODUCTION (CASE STUDY: ARID REGION, SAVEH, BAKHSHALI-NEMATI). IRANIAN JOURNAL OF NATURAL RESOURCES, 58(3), 719-729. SID. https://sid.ir/paper/22730/en

Vancouver: Copy

FARZADMEHR J., ARZANI HOSSEIN, NAZARI SAMANI A.A.. AN INVESTIGATION OF THE CAPABILITY OF MULTI-TEMPORAL DATA OF LANDSAT 7 SATELLITE IN ESTIMATING VEGETATION COVER AND PRODUCTION (CASE STUDY: ARID REGION, SAVEH, BAKHSHALI-NEMATI). IRANIAN JOURNAL OF NATURAL RESOURCES[Internet]. 2005;58(3):719-729. Available from: https://sid.ir/paper/22730/en

IEEE: Copy

J. FARZADMEHR, HOSSEIN ARZANI, and A.A. NAZARI SAMANI, “AN INVESTIGATION OF THE CAPABILITY OF MULTI-TEMPORAL DATA OF LANDSAT 7 SATELLITE IN ESTIMATING VEGETATION COVER AND PRODUCTION (CASE STUDY: ARID REGION, SAVEH, BAKHSHALI-NEMATI),” IRANIAN JOURNAL OF NATURAL RESOURCES, vol. 58, no. 3, pp. 719–729, 2005, [Online]. Available: https://sid.ir/paper/22730/en

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