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פותח על ידי קלירמאש פתרונות בע"מ -
Polyacrylamide application versus forest residue mulching for reducing post-fire runoff and soil erosion
Year:
2014
Source of publication :
Science of the Total Environment
Authors :
בן-חור, מני
;
.
Volume :
468-469
Co-Authors:
Prats, S.A., Centre for Environmental and Maritime Studies (CESAM), Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
Martins, M.A.D.S., Centre for Environmental and Maritime Studies (CESAM), Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
Malvar, M.C., Centre for Environmental and Maritime Studies (CESAM), Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
Ben-Hur, M., Institute of Soil, Water and Environmental Sciences, Volcani Center, ARO, PO Box 6, Bet Dagan 50250, Israel
Keizer, J.J., Centre for Environmental and Maritime Studies (CESAM), Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
Facilitators :
From page:
464
To page:
474
(
Total pages:
11
)
Abstract:
For several years now, forest fires have been known to increase overland flow and soil erosion. However, mitigation of these effects has been little studied, especially outside the USA. This study aimed to quantify the effectiveness of two so-called emergency treatments to reduce post-fire runoff and soil losses at the microplot scale in a eucalyptus plantation in north-central Portugal. The treatments involved the application of chopped eucalyptus bark mulch at a rate of 10-12Mgha-1, and surface application of a dry, granular, anionic polyacrylamide (PAM) at a rate of 50kgha-1. During the first year after a wildfire in 2010, 1419mm of rainfall produced, on average, 785mm of overland flow in the untreated plots and 8.4Mgha-1 of soil losses. Mulching reduced these two figures significantly, by an average 52 and 93%, respectively. In contrast, the PAM-treated plots did not differ from the control plots, despite slightly lower runoff but higher soil erosion figures. When compared to the control plots, mean key factors for runoff and soil erosion were different in the case of the mulched but not the PAM plots. Notably, the plots on the lower half of the slope registered bigger runoff and erosion figures than those on the upper half of the slope. This could be explained by differences in fire intensity and, ultimately, in pre-fire standing biomass. © 2013 Elsevier B.V.
Note:
Related Files :
Biomass
Eucalyptus
rain
runoff
soil
soil conservation
soil erosion
Soils
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.scitotenv.2013.08.066
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31380
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:02
Scientific Publication
Polyacrylamide application versus forest residue mulching for reducing post-fire runoff and soil erosion
468-469
Prats, S.A., Centre for Environmental and Maritime Studies (CESAM), Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
Martins, M.A.D.S., Centre for Environmental and Maritime Studies (CESAM), Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
Malvar, M.C., Centre for Environmental and Maritime Studies (CESAM), Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
Ben-Hur, M., Institute of Soil, Water and Environmental Sciences, Volcani Center, ARO, PO Box 6, Bet Dagan 50250, Israel
Keizer, J.J., Centre for Environmental and Maritime Studies (CESAM), Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
Polyacrylamide application versus forest residue mulching for reducing post-fire runoff and soil erosion
For several years now, forest fires have been known to increase overland flow and soil erosion. However, mitigation of these effects has been little studied, especially outside the USA. This study aimed to quantify the effectiveness of two so-called emergency treatments to reduce post-fire runoff and soil losses at the microplot scale in a eucalyptus plantation in north-central Portugal. The treatments involved the application of chopped eucalyptus bark mulch at a rate of 10-12Mgha-1, and surface application of a dry, granular, anionic polyacrylamide (PAM) at a rate of 50kgha-1. During the first year after a wildfire in 2010, 1419mm of rainfall produced, on average, 785mm of overland flow in the untreated plots and 8.4Mgha-1 of soil losses. Mulching reduced these two figures significantly, by an average 52 and 93%, respectively. In contrast, the PAM-treated plots did not differ from the control plots, despite slightly lower runoff but higher soil erosion figures. When compared to the control plots, mean key factors for runoff and soil erosion were different in the case of the mulched but not the PAM plots. Notably, the plots on the lower half of the slope registered bigger runoff and erosion figures than those on the upper half of the slope. This could be explained by differences in fire intensity and, ultimately, in pre-fire standing biomass. © 2013 Elsevier B.V.
Scientific Publication
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