Báo cáo lâm nghiệp: "A fire probability model for forest stands in Catalonia (north east Spain)" pot

Ngày tải lên: 07/08/2014, 16:20

... probability model for forest stands in Catalonia pre- sented in this study opens many possibilities to integrate the risk of fire into forest management planning and decision-making. The parameters included ... stand-level model for the probability of fire adequate for forest management planning in Catalonia. The model should use variables that are normally me...

Ngày tải lên: 08/08/2014, 00:22

... groups: Group 1: Low sampling effort models, including those models which need diameter measurements and knowledge of age in some cases. Group 2: Medium sampling effort models, including models which need ... 3.24 237 Ann. For. Sci. 60 (2003) 237–245 © INRA, EDP Sciences, 2003 DOI: 10.1051 /forest: 2003015 Original article A height-diameter model for Pinus radiata D. Don in Galicia...

Ngày tải lên: 08/08/2014, 01:21

... 1.19 for parameter a in the model of West et al. [27], when two new links are formed in each bifurcation (n =2 in Eqs. (3–7)). In E. lanceolata, the average link length varied from 15 cm in order ... biomass dynamics in a sole cropping and an alley cropping system with Gliricidia sepium in the semi-deciduous rainforest zone of West Africa, Agro- for. Syst. 31 (1995) 181–198...

Ngày tải lên: 08/08/2014, 01:21

... yellowing of leaves in selected forest trees in Slovakia. Nauka za Gorata – Forest Science, 43: 29–36. SCHIEBER B., 2006b. Spring phenology of European beech (Fagus sylvatica L.) in submountain ... variabil- ity in the onset of selected vegetative phenological phases in four deciduous forest tree species in a submountain beech forest stand during the period of 13 yea...

Ngày tải lên: 07/08/2014, 10:21

... process- ing time from the current level of 20 min per tree to something in the order of one minute per tree, thus enabling the method to become more efficient and potentially usable in routine forest inventory. ... need for special illumination conditions. This method can be used in inaccessible forests, with a high density of trees where other techniques may be problematic. The main...

Ngày tải lên: 07/08/2014, 16:21

... is the case in forest inventory) were estimated. Elfving and Kiviste [8] proposed 13 functions having a zero point, being monotonously increasing and having one inflexion point, for approximation ... were 0.11 for the P. sylvestris ingrowth model, 0.11 for the P. nigra ingrowth model, 0.12 for the P. sylvestris mean dbh of ingrowth model, and 0.05 for the P. nigra mean dbh o...

Ngày tải lên: 08/08/2014, 01:22

... information about the character of the areas of forest lands under HVPL in the Czech J. FOR. SCI., 56, 2010 (1): 35–40 35 JOURNAL OF FOREST SCIENCE, 56, 2010 (1): 35–40 e forest land use in ... regenerate in zones of HVPL or in open areas outside the forest the results of which Costs of basic methods of forest landmaintenance in protective zones of high-voltage power...

Ngày tải lên: 07/08/2014, 10:21

... dam- age models and post -fire tree survival models appropriate for forest planning purposes and scenario analyses in Catalonia. The models should use variables that are easily measurable in forest inventories ... Inventory plots The modelling data included inventory data and fire occurrence data. The data on forest stands were obtained from the second and third Spanish N...

Ngày tải lên: 07/08/2014, 16:21

... silvicultural instructions for reaching the optimal management regime for a given stand. These instruc- tions can be used directly by forest managers. Nevertheless, in practical forestry existing stands ... ana- lysed by a forest- level optimisation model (solved using linear programming or other procedures) to find an optimum forest- wide management regime. Acknowledgements: F...

Ngày tải lên: 08/08/2014, 00:21