The Influence of Increased Salvage Felling on Forwarding Distance and the Removal—A Case Study from Croatia

Forests

Zoran Bumber¹  Andreja Đuka²  Tibor Pentek²  Tomislav Poršinsky²  Ivica Papa² 

[1] Croatian Forests Ltd., Forest Administration Zagreb, Lazinska Street 41, 10000 Zagreb, Croatia;Faculty of Forestry, University of Zagreb, Svetošimunska Street 25, 10000 Zagreb, Croatia;

关键词: even-aged forest;    oak dieback;    geometric forwarding distance;    harvesting planning;   

DOI  :  10.3390/f12010007

来源: DOAJ

【 摘 要 】

During the seven-year research period, the average annual removal was by 3274 m³ higher than the average annual removal prescribed by the existing management plan (MP). The main reason lies in the high amount of salvage felling volume at 55,238 m³ (38.3%) in both the main and the intermediate felling due to oak dieback. The analysis of forest accessibility took into account the spatial distribution of cutblocks (with ongoing felling operations) and the volume of felled timber for two proposed factors: (1) the position of the cutblock and (2) the position of the removal. Cutblock position factor took into account the spatial position of the felling areas/sites, while removal position factor besides the spatial reference took into account the amount of felled timber (i.e., volume) both concerning forest infrastructure network and forest operations. The analysed relative forest openness by using geo-processing workflows in GIS environment showed four types of opening areas in the studied management unit (MU): single-opened, multiple-opened, unopened and opened areas outside of the management unit. Negative effects of the piece-volume law and low harvesting densities on forest operations are highlighted in this research due to high amount of salvage felling particularly in the intermediate felling by replacing timber volume that should have come from thinnings.

【 授权许可】

Unknown