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Information Journal Paper

Title

USING VEGETATION INDICES FOR ESTIMATION OF CANOPY COVER PERCENTAGE OF RANGELAND VEGETATION (IN PROTECTED AREA OF JAHAN – NAMA, GORGAN)

Author(s)

SEPEHR ADEL | MOTTAGHI M.R.

Pages

  259-271

Abstract

 Application of vegetation indices derived from LANDSAT THEMATIC MAPPER imagery to estimate RANGELAND vegetation CANOPY COVER percentage of JAHAN-NAMA protected area was assessed. Stratified random sampling was designed and 370 sample plots on 37 sample units were allocated in the field using Global positioning System (GPS). LANDSAT THEMATIC MAPPER image, dated on 1998, was geometrically corrected with RMS error of less than 0.98-pixel size. Corresponding mean values of 9-pixel elements belonging to sample units for all created indices were extracted. Corresponding field measurements have been regressed against TM data, as an independent variable, and 69 VEGETATION INDEX values created by different combination of TM bands as dependent varibables. Their statistical models have been developed. Results show that if CANOPY COVER percentage without its arrangement in classes is entered in the REGRESSION ANALYSIS, LANDSAT data are unable to detect their changes. The results also show that LANDSAT data are capable of detecting high CANOPY COVER percentage classes when field data are categorized. Regression analyses show promising results in estimating CANOPY COVER percentage of RANGELAND vegetation. The index, (TM5- TM3)/(TM5+TM3), shows high correlation (0.99) with the first CANOPY COVER class (71.9- 88.1%), (TM3-TM7)/(TM3+TM7) and (TM6)/(TM3+TM5) show high correlation with the second class (58.6-71.9%). Having more than 0.85 regression coefficient. (TM6)/(TM7-TM2) demonstrates high correlation with the third canopy class having 45.2-58.6 percent CANOPY COVERage. For the last class, no index is introduced, because of any significant correlation between CANOPY COVER and all involved indices.

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References

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APA: Copy

SEPEHR, ADEL, & MOTTAGHI, M.R.. (2002). USING VEGETATION INDICES FOR ESTIMATION OF CANOPY COVER PERCENTAGE OF RANGELAND VEGETATION (IN PROTECTED AREA OF JAHAN – NAMA, GORGAN). IRANIAN JOURNAL OF NATURAL RESOURCES, 55(2), 259-271. SID. https://sid.ir/paper/361931/en

Vancouver: Copy

SEPEHR ADEL, MOTTAGHI M.R.. USING VEGETATION INDICES FOR ESTIMATION OF CANOPY COVER PERCENTAGE OF RANGELAND VEGETATION (IN PROTECTED AREA OF JAHAN – NAMA, GORGAN). IRANIAN JOURNAL OF NATURAL RESOURCES[Internet]. 2002;55(2):259-271. Available from: https://sid.ir/paper/361931/en

IEEE: Copy

ADEL SEPEHR, and M.R. MOTTAGHI, “USING VEGETATION INDICES FOR ESTIMATION OF CANOPY COVER PERCENTAGE OF RANGELAND VEGETATION (IN PROTECTED AREA OF JAHAN – NAMA, GORGAN),” IRANIAN JOURNAL OF NATURAL RESOURCES, vol. 55, no. 2, pp. 259–271, 2002, [Online]. Available: https://sid.ir/paper/361931/en

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