NDLI: Modeling spatial variability in the life-cycle costs of low-volume forest roads

Content Provider	Springer Nature Link
Author	Stückelberger, Jürg Andreas Heinimann, Hans Rudolf Burlet, Edouard Charles
Copyright Year	2006
Abstract	Cost estimation is probably the most decisive factor in the process of computer-aided, preliminary planning for low-volume road networks. However, the cost of construction is normally assumed to be route-independent for a specific project area, resulting in sub-optimal layouts. This is especially true for mountainous terrain and in areas with unstable subsoil. Here, we present a model for more accurately estimating spatial variability in road life-cycle costs, based on terrain surface properties as well as geological properties of the subsoil. This parametric model incorporates four structural components: embankment, retaining structures, pavement, and drainage and stream-crossing structures. It is linked to a geo-database that allows users to derive location-specific parameter values as input. In applying this model, we have demonstrated that variability in costs ranges widely for mountainous areas, with the most expensive construction being approximately five times greater there than on more favorable sites. This variability strongly affects the optimal layout of a road network. First, when location-specific slope gradients are considered, costs are reduced by about 17% from those calculated via currently available engineering practices; when both slope gradient and geotechnical formations are included, those costs are decreased by about 20%. Second, the length of the road network is increased by about 4% and 10% respectively, compared with current practices.
Starting Page	377
Ending Page	390
Page Count	14
File Format	PDF
ISSN	16124669
Journal	Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch
Volume Number	125
Issue Number	4
e-ISSN	16124677
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-05-06
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Low-volume forest roads Route-dependent construction cost Spatial variability of life-cycle cost Route location Optimal road network Plant Sciences Forestry Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Forestry

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