Effects of soil conservation practices on sediment yield from forest road ditches in Northern Iran

The fine-textured soil in forest road ditches is very susceptible to water erosion especially in rainy seasons in Hyrcanian forest. This study examined the yield of ditch segment-scale sediment after releasing two flow rates of 5 l s-1 and 10 l s-1 in segments treated by riprap (RR), grass cover by...

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Matična publikacija: Croatian journal of forest engineering (Online)
41 (2020), 2 ; str. 299-308
Glavni autori: Khandouzi, Rasoul (Author), Parsakhoo, Aidin, Sheikh, Vahedberdi, Pourmalekshah, Aliakbar Mohamadali
Vrsta građe: e-članak
Jezik: eng
Predmet:
Online pristup: https://doi.org/10.5552/crojfe.2020.680
Croatian journal of forest engineering (Online)
Hrčak
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024 7 |2 doi  |a 10.5552/crojfe.2020.680 
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042 |a croatica 
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080 1 |a 630  |2 2011 
100 1 |a Khandouzi, Rasoul  |4 aut  |9 HR-ZaNSK 
245 1 0 |a Effects of soil conservation practices on sediment yield from forest road ditches in Northern Iran  |h [Elektronička građa] /  |c Rasoul Khandouzi, Aidin Parsakhoo, Vahedberdi Sheikh, Aliakbar Mohamadali Pourmalekshah. 
300 |b Ilustr., graf. prikazi. 
504 |a Bibliografija: str. 306-307. 
504 |a Summary. 
520 |a The fine-textured soil in forest road ditches is very susceptible to water erosion especially in rainy seasons in Hyrcanian forest. This study examined the yield of ditch segment-scale sediment after releasing two flow rates of 5 l s-1 and 10 l s-1 in segments treated by riprap (RR), grass cover by Festuca arundinacea L. (GC), compacted cotton geotextile (CG) and wooden wattle by local slash (WW). Sediment sampling from the runoff was carried out at the end of each segment every minute. Runoff flow velocity in different treatments was measured using an electromagnetic flow meter. Sediment concentration and runoff velocity in treatments of RR, GC, CG, WW was significantly lower than that of the control plot (Ctl). Increasing flow rate from 5 l s-1 to 10 l s-1 caused no significant change in sediment concentration (except for Ctl and RR) and runoff velocity (except for Ctl and CG), which means that some water might have penetrated into treated soil by RR, GC and WW and this is not acceptable in forest road maintenance practices. Sediment yield from RR (0.36 g l-1) and Ctl (0.50 g l-1) under the flow rate of 10 l s-1 was significantly higher than that of 5 l s-1 with values of 0.21 g l-1 and 0.38 g l-1, respectively. Minimum amount of sediment concentration was observed for CG (0.20 g l-1) with compacted ditch bed. Moreover, runoff velocity in CG and Ctl under the flow rate of 10 l s-1 was significantly higher than that of 5 l s-1. For a forest road with dimension 30×50 cm, slope of 5%, and clay soil with porosity of 57%, treatments of compacted CG can be used in ditch with low flow rates (5 l s-1) and high flow rate (10 l s-1) because of their high efficiency in reducing sediment yield. 
653 0 |a Šumske ceste  |a Šumsko tlo  |a Oborinske vode  |a Erozija tla  |a Sediment  |a Stabilizacija tla  |a Geotekstil 
653 5 |a Iran 
700 1 |a Parsakhoo, Aidin  |4 aut 
700 1 |a Sheikh, Vahedberdi  |4 aut  |9 HR-ZaNSK 
700 1 |a Pourmalekshah, Aliakbar Mohamadali  |4 aut  |9 HR-ZaNSK 
773 0 |t Croatian journal of forest engineering (Online)  |x 1848-9672  |g 41 (2020), 2 ; str. 299-308  |w nsk.(HR-ZaNSK)000843366 
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856 4 0 |u https://doi.org/10.5552/crojfe.2020.680 
856 4 0 |u http://www.crojfe.com/archive/volume-41-no.2/effects-of-soil-conservation-practices-on-sediment-yield-from-forest-road-ditches-in-northern-iran/  |y Croatian journal of forest engineering (Online) 
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856 4 1 |y Digitalna.nsk.hr