نوع مقاله : پژوهشی کاربردی
نویسندگان
1 دانشآموخته دکتری علوم مرتع، کارشناس اداره منابع طبیعی و آبخیزداری استان کردستان ، سنندج، ایران
2 گروه مهندسی طبیعت، دانشکده منابع طبیعی و علوم زمین، دانشگاه شهرکرد، شهرکرد، ایران
3 گروه مرتع و آبخیزداری، دانشکده منابع طبیعی، دانشگاه کردستان، سنندج، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The present study was conducted to compare the spectral resolution of Sentinel 2A image (10 and 60 m) and ground resolution (1×1, 1×2, 2×2 and 3×3 m) to estimate production and vegetation in rangeland habitats of mountainous region adjacent to Choghakhor wetland in Chaharmahal and Bakhtiari. Dominant plant density was measured by counting stems in 2×2 quadrats, percentage of plant cover by trellises, and production was also measured in the form of double sampling and its relationship with percentage of canopy cover. Also, the type of distribution of dominant species was determined by statistical tests. After obtaining and making the necessary corrections to the Sentinel 2A image and calculating the relevant plant indices, the correlation of plant indices in relation to the percentage of cover and production was investigated. The present study showed that in the use of bands with a resolution of 10 meters, NDVI, CTVI, MSAVI2, Ratio, RVI, SAVI and TVI indices have a significant relationship with the percentage of coverage and production. The correlation of relationships in 1× 1 quadrats is not significant and the resulting model is not sufficiently valid. The 6-quadratic vector has a significant correlation. In the use of 60-meter bands, the results are somewhat different and the relationships between MSAVI2 and RVI indices with the percentage of cover and plant production are significant. In the use of bands with a resolution of 60 meters, the relationships obtained in both sampling methods (3 and 6 plates) have a weaker correlation than bands with a resolution of 10 meters. Finally, the results of this study showed that bands with a separation of 10 meters and 2× 1 quadrats be used with a 6-quadrat sampling method to obtain acceptable results and be applicable in terms of sampling.
کلیدواژهها [English]
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