The Impact of Group- and Single-Tree-Selection Cuttings on Runoff and Sediment Yield in Mixed Broadleaved Forests, Northern Iran

Hassan Samdaliri, Meghdad Jourgholami, Ali Salajegheh, Hadi Sohrabi, Rachele Venanzi (), Rodolfo Picchio and Angela Lo Monaco
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Hassan Samdaliri: Department of Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj 14176-43184, Iran
Meghdad Jourgholami: Department of Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj 14176-43184, Iran
Ali Salajegheh: Department of Arid and Mountainous Regions Reclamation, Faculty of Natural Resources, University of Tehran, Karaj 31587-77871, Iran
Hadi Sohrabi: Department of Forestry and Forest Economics, Faculty of Natural Resources, University of Tehran, Karaj 14176-43184, Iran
Rachele Venanzi: Department of Agricultural and Forest Sciences, Tuscia University, 01100 Viterbo, Italy
Rodolfo Picchio: Department of Agricultural and Forest Sciences, Tuscia University, 01100 Viterbo, Italy
Angela Lo Monaco: Department of Agricultural and Forest Sciences, Tuscia University, 01100 Viterbo, Italy

Sustainability, 2024, vol. 16, issue 5, 1-13

Abstract: Silvicultural treatment and the forest harvesting operations using different methods can lead to an increase in the production of runoff and sediment by changing the canopy and soil surface where they are conducted. In order to investigate this issue, sampling plots were established in the Namkhaneh district of the Kheyrud forest with three replications for every treatment: control stand and tree harvesting systems using single-selection cuttings and group-selection cuttings. The amount of runoff and sediment was collected and estimated from precipitation over a period of one year. Also, some soil physical properties such as bulk density, penetration resistance, sand, silt, and clay content, soil moisture, and soil organic matter were measured. The results showed that tree harvesting systems has a significant effect on runoff, the runoff coefficient, and sediment but the season (growing season and fall) and the combined effect of tree harvesting systems and the season have no significant effect on the runoff coefficient and sediment. The mean runoffs of each rainfall event for the control, single-tree, and group-selection treatments were 5.67, 8.42, and 10.28 mm, respectively, and the sediment amounts were 3.42, 6.70, and 11.82 gr/m 2 , respectively. Furthermore, the total annual erosion amounts of the control, selection, and grouping treatments were 0.427, 0.838, and 2.178 t/ha, respectively. The bulk density, penetration resistance, and percentage of sand and silt were positively related and the percentages of clay and organic matter were negatively related with the amount of runoff and sediment. In the method of individual selection cuttings, the damage to the forest in terms of the amount of runoff and soil erosion was less than for the group-selection cuttings. Forest harvesting by the selection method (single-selection and group-selection) has caused different changes in the vegetation canopy. The final summary of our results could be the advice to predominantly use the single-selection method in high-slope stands.

Keywords: forest harvesting; single- and group-selection method; canopy cover; annual erosion; runoff and sediment (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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