نتایج جستجو برای: diameter at breast height and crown diameter
تعداد نتایج: 17219040 فیلتر نتایج به سال:
Study of vegetation and environmental factors is considered as one of the important aspects in the management and conservation of natural ecosystems. This research investigates the effect of altitude from sea level (ASL) (in four classes: less than 1600 m, 1600-1800, 2000-1800 and more than 2000 m) and the direction of slope (in four main directions: north, south, east and west) on vegetative a...
Quantification of biophysical parameters of urban trees is important for urban planning, and for assessing carbon sequestration and ecosystem services. Airborne lidar has been used extensively in recent years to estimate biophysical parameters of trees in forested ecosystems. However, similar studies are largely lacking for individual trees in urban landscapes. Prediction models to estimate bio...
The tree diameter at breast height (DBH) is one of the most important variables for monitoring forest ecology. Mobile laser scanning (MLS), which has been widely applied in forestry field, makes DBH measurement fast and convenient. However, there are many shrubs deadwood neutral environment point clouds quality from MLS easily affected by results low single segmentation estimation accuracy. To ...
Given the importance of availability sufficient and accurate information on the structural characteristics of mangroves to develop conservation and restoration programs for these ecosystems, this study investigates and maps the structural characteristics of the coastal and island forms of the mangroves in the Hara Biosphere Reserve. To this end, through a field inventory (32 sample plots with t...
the present study was conducted to determine the most appropriate tree species planted in the same ecological condition considering different variables at darabkola forest, mazandran province. for this purpose, the success of planted species (maple, walnut, oak, pine, ash and elm) was assessed according to ninecriteria (soil nitrogen, soil phosphorus, soil potassium, leaf nitrogen, leaf phospho...
Koa (Acacia koa A. Gray) is an endemic Hawaiian hardwood tree of high ecological, cultural and economic value. Despite its multiple values, research on the silviculture of koa has been minimal until recently because the preferred land-use was pasture for livestock, and logging was done mainly to facilitate and reduce the costs of conversion. This study examined growth response of selected poten...
A method of estimating forest-fire fuel loads was developed using drones to collect information about the height and diameter-at-breast-height (DBH) individual trees. It conducted for forest fire prevention monitoring (Control, 20% thinned, 40% thinned area) located in Goseong-gun, Gangwon-do. Object-based images 3D-model red/green/blue band characteristics were superimposed select extract digi...
Relationships between tree height and crown dimensions and trunk diameter were determined for shade-tolerant species of old-growth forests of western Oregon. The study included both understory and overstory species, deciduous and evergreen angiosperms and evergreen conifers. A comparison of adult understory species with sapling overstory species of similar height showed greater crown width and ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید