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Forest road, Remote Sensing, GIS, DEM, Best path modelling
Suziyanna Arshad, Mohd Hakimi Rahman Mckreddy YabanJulius
Forest roads play a crucial role in sustainable forest management. The main objective of forest roads are to provide access to the forest for transporting forest products. To assist forest planning and management, existing roads locations in the forest must be mapped and inventoried. However, forest roads inventory is costly and time consuming task as it is mostly done manually. Hence, the use of remote sensing and GIS can be an alternative method to align and locate forest road network by using best-path modelling method. It can help the forest managers to evaluate alternatives and select the optimal location for forest road network in effective way time consuming and in reduce costs. From this study, the main parameters influencing the road construction were identified, i.e. elevation, slope, aspect and river. The 1 metre IFSAR digital elevation model (DEM) data was utilized as terrain data to calculate slope and aspect. Meanwhile, the GIS was used since it is becoming the mainstream tool in forest road network alignment and location analysis. The results showed that the road alignment planning by best-path model has an accuracy of 85% compared to road networks produced by surveyors and thus, it also fulfilled Forestry Department’s standard guidelines. The result was not only associated with forest transportation, but at the same time it is useful to identify risk of road construction to the environment. This revealed that the minimum density of forest road construction can help mitigate the loss of ecological services of tropical forest subject to logging pressure and lead to greater financial benefit in future operations.
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