کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4465229 1621849 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tree survey and allometric models for tiger bush in northern Senegal and comparison with tree parameters derived from high resolution satellite data
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات کامپیوتر در علوم زمین
پیش نمایش صفحه اول مقاله
Tree survey and allometric models for tiger bush in northern Senegal and comparison with tree parameters derived from high resolution satellite data
چکیده انگلیسی

A tree survey and an analysis of high resolution satellite data were performed to characterise the woody vegetation within a 10 × 10 km2 area around a site located close to the town of Dahra in the semi-arid northern part of Senegal. The surveyed parameters were tree species, height, tree crown radius, and diameter at breast height (DBH), for which allometric models were determined. An object-based classification method was used to determine tree crown cover (TCC) from Quickbird data. The average TCC from the tree survey and the respective TCC from remote sensing were both about 3.0%. For areas beyond the surveyed areas TCC varied between 3.0% and 4.5%. Furthermore, an empirical correction factor for tree clumping was obtained, which considerably improved the estimated number of trees and the estimated average tree crown area and radius. An allometric model linking TCC to tree stem crosssectional area (CSA) was developed, which allows to estimate tree biomass from remote sensing. The allometric models for the three main tree species found performed well and had r2-values of about 0.7–0.8.

Research highlights
► The feasibility of estimating tree cover from high resolution data is demonstrated.
► Allometric models for the DBH and tree height and crown size was developed.
► The method is suitable for estimation of tree-biomass for semi-arid areas.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Applied Earth Observation and Geoinformation - Volume 13, Issue 4, August 2011, Pages 517–527
نویسندگان
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