Evaluating the effect of biological stabilization on landslide control at the edge of forest road

Abstract

Hosseini S.A.O., Shahroodi E.F., Lotfalian M., Parsakhoo A. (2017): Evaluating the effect of biological stabilization on landslide control at the edge of forest road. J. For. Sci., Landslide is one of the negative sides of building non-standard roads in forest areas. The aim of the present study was to assess the effect of biological stabilization on landslide at the edge of forest roads in south and north aspects. For this purpose, in Neka forest (Mazandaran province) three treatments including control, sliding and stabilized areas covered by 35-years-old even-aged alder trees were selected. Benchmarking and soil sampling were conducted during three periods including July, November after rainfall events and March after rainfall events. The results showed that the mean movement of landslide in north direction was 9 cm, while this value was 6 cm in south direction. Sliding in north direction was 32% more than that in south direction. Biological stabilization by alder in north and south direction caused a 33 and 66% reduction in landslide movement, respectively. The characteristics of soil mechanics were different between stabilized and sliding areas. Besides, the soil texture in north direction for control and stabilized areas was clay with high liquid limit (CH) and for sliding area it was clay with low liquid limit, while this value in south direction was CH for three treatments of control, stabilized and sliding areas. To plan biological stabilization, the mechanical characteristics of soil, site features, and appropriate plant species should be considered as important factors.

Effects of CO2 and Soil Moisture Treatments on Morphological and Allometric Trait Variation in Coppiced Seedlings: A Study of Four Early-Successional Deciduous Species

“…Although the slope of the response line of root dm allocation to size was negative, the initial allocation to root dm was high (~51%). Alders have been successful in soil stabilization projects before [31,32], and other studies have noted the importance of root structure to riparian species [33], which is representative of the ecological niche these alder species inhabit. For green alder, a strong root structure would be important in stabilization on sloped, upland sites, and like speckled alder, to ensure continuous water supply, as is important for the genera.…”

Cut slope stability assessment along forest roads using the limit equilibrium approaches and Slide software

“…One of the main ingredient stimulators of landslides is the road construction which is the basis for the large landslides by creating unstable trenches on both sides of the https://doi.org/10.17221/21/2022-JFS road, changing the waterway paths and clearing trees on the cut slope of road and removes the tree roots from the soil. Plant roots and vegetation can increase the mechanical reinforcement in slopes susceptible to landslide (Bordoni et al 2016;Cohen, Schwarz 2017;Hosseini et al 2017). This reinforcement can reduce the risk of shallow landslides and increase the slope stability.…”