Dynamics of vegetation in Karun watershed within Khuzestan province in relation with Temperature factors and precipitation
The aim of this study is to retrieve land surface temperature (LST), air temperature (AT) and precipitation and to study their relationship with vegetation in rang lands of Karun watershed of Khuzestan province. For this purpose, land surface temperature (LST) and NDVI was drived from NOAA-AVHRR for...
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Kharazmi University
2017-03-01
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| Series: | تحقیقات کاربردی علوم جغرافیایی |
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| Online Access: | http://jgs.khu.ac.ir/article-1-2765-en.pdf |
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| author | Saman alimoradi Asadollah : khoorani Yahya esmaeilpoor |
| author_facet | Saman alimoradi Asadollah : khoorani Yahya esmaeilpoor |
| author_sort | Saman alimoradi |
| collection | DOAJ |
| description | The aim of this study is to retrieve land surface temperature (LST), air temperature (AT) and precipitation and to study their relationship with vegetation in rang lands of Karun watershed of Khuzestan province. For this purpose, land surface temperature (LST) and NDVI was drived from NOAA-AVHRR for maximum amount of greenness (April) for a period of 27 years. In order to extract LST, Price algorithm was used. Also air temperature and precipitation were interpolated for selected weather stations using IDW method. Spatial correlation outcomes (on 0.05) between NDVI with LST and air temperature show a reversed relation. This spatial relation is stronger for LST, so that this coefficient is often upper than 0.6, while seldom is 0.4 for air temperature and precipitation. Spatial regression models show that 62 percent of NDVI changes is determined by LST (R2=0.62) and air temperature and precipitation determine very limited amount of NDVI dynamics. |
| format | Article |
| id | doaj-art-ffda1a8c16b34bd1a8b4f5c6fe1abdf6 |
| institution | Kabale University |
| issn | 2228-7736 2588-5138 |
| language | fas |
| publishDate | 2017-03-01 |
| publisher | Kharazmi University |
| record_format | Article |
| series | تحقیقات کاربردی علوم جغرافیایی |
| spelling | doaj-art-ffda1a8c16b34bd1a8b4f5c6fe1abdf62025-01-31T17:23:33ZfasKharazmi Universityتحقیقات کاربردی علوم جغرافیایی2228-77362588-51382017-03-011744155177Dynamics of vegetation in Karun watershed within Khuzestan province in relation with Temperature factors and precipitationSaman alimoradi0Asadollah : khoorani1Yahya esmaeilpoor2 The aim of this study is to retrieve land surface temperature (LST), air temperature (AT) and precipitation and to study their relationship with vegetation in rang lands of Karun watershed of Khuzestan province. For this purpose, land surface temperature (LST) and NDVI was drived from NOAA-AVHRR for maximum amount of greenness (April) for a period of 27 years. In order to extract LST, Price algorithm was used. Also air temperature and precipitation were interpolated for selected weather stations using IDW method. Spatial correlation outcomes (on 0.05) between NDVI with LST and air temperature show a reversed relation. This spatial relation is stronger for LST, so that this coefficient is often upper than 0.6, while seldom is 0.4 for air temperature and precipitation. Spatial regression models show that 62 percent of NDVI changes is determined by LST (R2=0.62) and air temperature and precipitation determine very limited amount of NDVI dynamics.http://jgs.khu.ac.ir/article-1-2765-en.pdfvegetationclimatic elementsprice algorithmkarun watershedspatial correlation |
| spellingShingle | Saman alimoradi Asadollah : khoorani Yahya esmaeilpoor Dynamics of vegetation in Karun watershed within Khuzestan province in relation with Temperature factors and precipitation تحقیقات کاربردی علوم جغرافیایی vegetation climatic elements price algorithm karun watershed spatial correlation |
| title | Dynamics of vegetation in Karun watershed within Khuzestan province in relation with Temperature factors and precipitation |
| title_full | Dynamics of vegetation in Karun watershed within Khuzestan province in relation with Temperature factors and precipitation |
| title_fullStr | Dynamics of vegetation in Karun watershed within Khuzestan province in relation with Temperature factors and precipitation |
| title_full_unstemmed | Dynamics of vegetation in Karun watershed within Khuzestan province in relation with Temperature factors and precipitation |
| title_short | Dynamics of vegetation in Karun watershed within Khuzestan province in relation with Temperature factors and precipitation |
| title_sort | dynamics of vegetation in karun watershed within khuzestan province in relation with temperature factors and precipitation |
| topic | vegetation climatic elements price algorithm karun watershed spatial correlation |
| url | http://jgs.khu.ac.ir/article-1-2765-en.pdf |
| work_keys_str_mv | AT samanalimoradi dynamicsofvegetationinkarunwatershedwithinkhuzestanprovinceinrelationwithtemperaturefactorsandprecipitation AT asadollahkhoorani dynamicsofvegetationinkarunwatershedwithinkhuzestanprovinceinrelationwithtemperaturefactorsandprecipitation AT yahyaesmaeilpoor dynamicsofvegetationinkarunwatershedwithinkhuzestanprovinceinrelationwithtemperaturefactorsandprecipitation |