Izvorni znanstveni članak
Impacts of Forest Roads on Soil in a Timber Harvesting Area in Northwestern Mexico (a Case Study)
Ciro Hernández-Díaz
; Universidad Juárez del Estado de Durango Institute of Silviculture and Wood Science Fracc. Ciudad Universitaria, Blvd. Guadiana 501 Durango 34120 MÉXICO
Jesús Soto-Cervantes
; Universidad Juárez del Estado de Durango Faculty of Forest Sciences Fracc. Ciudad Universitaria, Blvd. Durangoy Río Papaloapan 34120 MÉXICO
Javier Corral-Rivas
; Universidad Juárez del Estado de Durango Institute of Silviculture and Wood Science Fracc. Ciudad Universitaria, Blvd. Guadiana 501 Durango 34120 MÉXICO
Eusebio Montiel-Antuna
; Universidad Juárez del Estado de Durango Faculty of Forest Sciences Fracc. Ciudad Universitaria, Blvd. Durangoy Río Papaloapan 34120 MÉXICO
Ramón Alvarado
; Universidad Juárez del Estado de Durango Institute of Silviculture and Wood Science Fracc. Ciudad Universitaria, Blvd. Guadiana 501 Durango 34120 MÉXICO
Rodolfo Goche-Télles
; Universidad Juárez del Estado de Durango Faculty of Forest Sciences Fracc. Ciudad Universitaria, Blvd. Durangoy Río Papaloapan 34120 MÉXICO
Sažetak
The impacts of forest roads on soil were studied in a timber harvesting area of 92 ha in the municipality of San Dimas, state of Durango, Mexico. The area included 3127 m of main roads, 2907 m of secondary roads and 2979 m of tertiary roads. The timber was harvested at the beginning of 2012. After logging, soil loss by run-off during the rainy season was assessed along the truck ruts. This variable was correlated with the width and the longitudinal and transverse slopes of the road. The overall average road density (98 m/ha) indicated an average external yarding distance of 102 m. This is a short distance considering that timber was drawn with a jammer, which can pull logs over a distance of 300 m or more. Run-off in the rainy season decreased the ground level by between 38 and 58 mm along the truck ruts, and the soil loss was different in each type of road. The findings have led us to propose the elimination of some tertiary roads, to reduce the total road density to 78 m/ha. This is more than sufficient for logging, especially if the jammer capacity is improved, e.g., by applying the highlead system or the aerial yarding system with jammer. We estimate that soil loss would be reduced by 20% with the proposed changes to the road network. Additionally, the new road network would enable almost 20% of the area now occupied by roads to be reforested.
Ključne riječi
yarding systems; road density; run-off; erosion
Hrčak ID:
151824
URI
Datum izdavanja:
1.10.2015.
Posjeta: 903 *