After road construction in steep and mountainous areas, there is always a risk for trench failure. Estimation of this probability before forest design urgent. Besides, to decrease failures costs risks, it necessary classify their occurrence probabilities identify the factors affecting them. The present study compares three statistical models logistic regression, frequency ratio, maximum entropy...

We believe that in tropics we need a community approach to evaluate road impacts on wildlife, and thus, suggest mitigation measures for groups of species instead a focal-species approach. Understanding which landscape characteristics indicate road-kill events may also provide models that can be applied in other regions. We intend to evaluate if habitat or matrix is more relevant to predict road...

Observations of sediment yield from road segments in the Oregon Coast Range show that either heavy traffic during rainfall or blading the road ditch will increase erosion from forest roads. For the fine soils and high quality aggregate surfacing on the study plots, ditch blading increased sediment yield more than traffic equivalent to 12 log trucks per day. The combination of ditch blading and ...

Regional studies of land cover change are often limited by available data and in terms of comparability across regions, by the transferability of methods. This research addresses the role of roads and infrastructure improvements across a tri-national frontier region with similar climatic and biophysical conditions but very different trajectories of forest clearing. The standardization of method...

P. Straková, R. M. Niemi, C. Freeman, K. Peltoniemi, H. Toberman, I. Heiskanen, H. Fritze, and R. Laiho Peatland Ecology Group, Department of Forest Sciences, University of Helsinki, P.O. Box 27, 00014 University of Helsinki, Finland Finnish Forest Research Institute, Vantaa Research Unit, P.O. Box 18, 01301 Vantaa, Finland Finnish Environment Institute, P.O. Box 140, 00251 Helsinki, Finland Wo...

The impact of unsealed forest road networks on stream water quality has long been recognised and documented by many researchers (e.g. Takken et al., 2005; Flanagan et al., 2003; Croke and Mockler, 2001; Megahan et al. 2001; Croke et al., 1999; Montgomery, D.R., 1994 and Anderson et al. 1976). However, the importance of the degree of road-to-stream connectivity has only generated a limited amoun...

The verification of existing data is an important task in order to ensure a high level of data quality in Geographic Information Systems (GIS). Today this work is carried out mostly manually by an operator, who compares vector data from databases with remotely sensed imagery. In this paper we present a system for automated road data verification using digital image processing for the extraction...