MONITORING THE EFFECTS OF PRECIPITATION ON VEGETATION COVER CHANGES USING REMOTE SENSING TECHNIQUES IN 12 YEARS PERIOD

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HADIAN FATEMEH; JAFARI REZA; BASHARI HOSSEIN; SOLTANI SAEED

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Journal: Journal of Range and Watershed Managment Year:2014 | Volume:66 | Issue:4 Page(s): 621-632

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Title

MONITORING THE EFFECTS OF PRECIPITATION ON VEGETATION COVER CHANGES USING REMOTE SENSING TECHNIQUES IN 12 YEARS PERIOD

Author(s)

HADIAN FATEMEH | JAFARI REZA | BASHARI HOSSEIN | SOLTANI SAEED | Issue Writer Certificate

Keywords

LANDSATQ2

PRECIPITATIONQ2

SEMIROMQ2

VEGETATION COVERQ1

Abstract

Precipitation is one of the most effective factors on vegetation changes especially in arid and semi- arid ecosystems. Because soil moisture condition affects vegetation changes, monitoring of drought and vegetation changes are among valuable management tools in these ecosystems. Nowadays, satellite images are used as a low-cost and fast method for vegetation study in different scales. Vegetation change is assessed using vegetation spectral characteristics. This study aimed to analyze and monitor the VEGETATION COVER changes in 4 rangelands sites and also one forest site in south of Isfahan and southeastern of Chaharmahal and Bakhtiary province during 1997-2009. Field sampling was used for measuring the percentage of canopy cover in all vegetation types using step-point method in radial direction (6000 points per vegetation type) and also regression analysis technique was used to ensure if VEGETATION COVER can be measured properly using a LANDSAT images from 2009. Then, NDVI indices were derived from 12 LANDSAT images between 1997 to 2009 (all images were taken from 22th of May to 5th of June each year) to monitor vegetation changes. According to results, there was significant correlation between NDVI indices and canopy cover in all vegetation types. The analysis of canopy cover changes indicated that the PRECIPITATION had various effects on different vegetation types based on their plant form and ecological condition. VEGETATION COVER in rangeland types was mainly correlated with spring PRECIPITATION but in forest type, it was more correlated with annual PRECIPITATION. Also the effects of PRECIPITATION on studied sites were different based on their dominant vegetation types. The highest relationship was found between PRECIPITATION and vegetation indices in rangeland types dominated by grasses and this highlights the efficiency of NDVI indices in drought assessment and management programs.

Cites

THE EFFECTS OF CLIMATIC PARAMETERS ON VEGETATION COVER AND FORAGE PRODUCTION OF FOUR GRASS SPECIES IN SEMI-STEPPE RANGELANDS IN MAZANDARAN PROVINCE, IRAN

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APA: Copy

HADIAN, FATEMEH, JAFARI, REZA, BASHARI, HOSSEIN, & SOLTANI, SAEED. (2014). MONITORING THE EFFECTS OF PRECIPITATION ON VEGETATION COVER CHANGES USING REMOTE SENSING TECHNIQUES IN 12 YEARS PERIOD. JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), 66(4), 621-632. SID. https://sid.ir/paper/162402/en

Vancouver: Copy

HADIAN FATEMEH, JAFARI REZA, BASHARI HOSSEIN, SOLTANI SAEED. MONITORING THE EFFECTS OF PRECIPITATION ON VEGETATION COVER CHANGES USING REMOTE SENSING TECHNIQUES IN 12 YEARS PERIOD. JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2014;66(4):621-632. Available from: https://sid.ir/paper/162402/en

IEEE: Copy

FATEMEH HADIAN, REZA JAFARI, HOSSEIN BASHARI, and SAEED SOLTANI, “MONITORING THE EFFECTS OF PRECIPITATION ON VEGETATION COVER CHANGES USING REMOTE SENSING TECHNIQUES IN 12 YEARS PERIOD,” JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 66, no. 4, pp. 621–632, 2014, [Online]. Available: https://sid.ir/paper/162402/en

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