Forest roads system in mountain relief: indicator evaluation of water-erosion risk
Paweł Dąbek , Romuald Żmuda , Tomasz Kowalczyk , Jolanta Dąbrowska , Andrzej Moryl , Ewa Kucharczak-Moryl
AbstractAccording to existing scientific assessments, water erosion is one of the main processes responsible for the degradation of the natural environment in the Polish Sudety Mountains. The anthropogenic activity in forested areas, as well as forestry management, requires a dense network of internal roads, which limits the protective functions of the forest in terms of preventing soil erosion. An important factor contributing to the intensification of water erosion in forested areas is the improper location of roads in relation to land relief. While designing the routing of forest roads, their influence on the intensity and spatial extent of water-erosion is often omitted. On the basis of the Digital Terrain Model (DTM) and spatial data for the Polish part of the Western Sudety, an effort was made to evaluate the existing forest road networks with respect to their placement in land relief. The location of roads was evaluated using an analysis that measures road orientation with regard to the direction of slope gradient. This was expressed using the indicator IARRR (Indicator of Arrangement of Rural Road in Relief). This method unequivocally characterises the location of roads with regard to land relief. It simultaneously serves as the basis for erosion risk evaluation alongside roads, as well as one of the risk evaluation factors for linear water erosion in a catchment. The results indicate a large share of along-slope roads (ca 10.0%) which tend to get easily deepened by the traffic, and a vast majority of road sections running diagonal to the slope (ca 76.0%) tend to collect and intensify superficial runoff, thereby increasing linear erosion.
|Journal series||Electronic Journal of Polish Agricultural Universties, ISSN 1505-0297, (B 12 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||water erosion, forest roads, arrangement in relief, IARRR, GIS, Sudety Mountains|
|License||Journal (articles only); published final; ; with publication|
|Score||= 12.0, 29-04-2020, ArticleFromJournal|
|Citation count*||2 (2020-09-17)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.