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פותח על ידי קלירמאש פתרונות בע"מ -
Effect of polyacrylamide as a post-fire erosion mitigation treatment during consecutive rainstorms [abstract]
Year:
2014
Source of publication :
Geophysical Research Abstracts
Authors :
בן-חור, מני
;
.
Volume :
16
Co-Authors:

Assaf Inbar, Marcelo Sternberg and Marcos Liñares 

Facilitators :
From page:
0
To page:
0
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Total pages:
1
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Abstract:

Anionic polyacrylamide (PAM) has been proven to be an effective chemical soil amendment for reducing erosion in arable lands and infrastructure projects, but few attempts have been made to use it as a post-fire mitigation measure. Moreover, the mechanisms by which PAM reduces soil erosion are not fully understood. In this study, we tested the use of 50 kg/ha granular PAM as a post-fire amendment on infiltration rate (IR), runoff and soil loss both in laboratory and field experiments involving multiple rainstorms. In the laboratory experiments, three consecutive storms separated by drying periods were applied by means of a rainfall simulator to two contrasting soils affected by fire (Humic Cambisol and Calcic Regosol). During the 1st rainstorm, PAM decreased IR and increased runoff in both soils due to an increase in viscosity of the runoff and soil solution. At the same time, a reduction in soil loss was observed in both PAM-treated soils compared to the untreated controls. During the first drying period, PAM was irreversibly adsorbed to soil particles, and in the following storms PAM-induced soil loss reduction persisted while the effect of the polymer on IR and runoff was reversed. Differences in the effect of PAM on soil erosion between soils were attributed to changes in the electrolyte concentration of runoff and soil solution. The positive effect of PAM on post-fire soil loss was confirmed in field experiments with erosion plots constructed in the burnt Calcic Regosol. The application of 25 and 50 kg/ha of granular PAM reduced soil erosion by 23 and 57%, respectively, compared to the untreated control. Runoff was reduced only in the 50 kg/ha treatment. It is suggested that the application of PAM could be a good alternative to current post-fire erosion mitigation measures.

Note:
EGU General Assembly 2014, held 27 April - 2 May, 2014 in Vienna, Austria, id.5226
Related Files :
Polyacrylamide
post-fire erosion
rain
runoff
soil erosion
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:

(1) Porter School of Environmental Studies, Tel-Aviv University, Ramat Aviv. Israel. (asinbar@gmail.com), (2) Institute of
Soil, Water and Environmental Sciences. The Volcani Center. A.R.O. Bet Dagan. Israel (meni@volcani.agri.gov.il), (3)
Department of Molecular Biology and Ecology of Plants, The George S. Wise Faculty of Life Sciences Tel-Aviv University,
Ramat Aviv, Israel. (MarceloS@tauex.tau.ac.il), (4) Faculty of Sciences. University of A Coruna. A Coruna. Spain.
(marcos.lado@udc.es)

Database:
גוגל סקולר
Publication Type:
מאמר מתוך כינוס
;
.
תקציר
;
.
Language:
אנגלית
Editors' remarks:
ID:
39271
Last updated date:
02/03/2022 17:27
Creation date:
10/02/2019 08:09
Scientific Publication
Effect of polyacrylamide as a post-fire erosion mitigation treatment during consecutive rainstorms [abstract]
16

Assaf Inbar, Marcelo Sternberg and Marcos Liñares 

Effect of polyacrylamide as a post-fire erosion mitigation treatment during consecutive rainstorms

Anionic polyacrylamide (PAM) has been proven to be an effective chemical soil amendment for reducing erosion in arable lands and infrastructure projects, but few attempts have been made to use it as a post-fire mitigation measure. Moreover, the mechanisms by which PAM reduces soil erosion are not fully understood. In this study, we tested the use of 50 kg/ha granular PAM as a post-fire amendment on infiltration rate (IR), runoff and soil loss both in laboratory and field experiments involving multiple rainstorms. In the laboratory experiments, three consecutive storms separated by drying periods were applied by means of a rainfall simulator to two contrasting soils affected by fire (Humic Cambisol and Calcic Regosol). During the 1st rainstorm, PAM decreased IR and increased runoff in both soils due to an increase in viscosity of the runoff and soil solution. At the same time, a reduction in soil loss was observed in both PAM-treated soils compared to the untreated controls. During the first drying period, PAM was irreversibly adsorbed to soil particles, and in the following storms PAM-induced soil loss reduction persisted while the effect of the polymer on IR and runoff was reversed. Differences in the effect of PAM on soil erosion between soils were attributed to changes in the electrolyte concentration of runoff and soil solution. The positive effect of PAM on post-fire soil loss was confirmed in field experiments with erosion plots constructed in the burnt Calcic Regosol. The application of 25 and 50 kg/ha of granular PAM reduced soil erosion by 23 and 57%, respectively, compared to the untreated control. Runoff was reduced only in the 50 kg/ha treatment. It is suggested that the application of PAM could be a good alternative to current post-fire erosion mitigation measures.

EGU General Assembly 2014, held 27 April - 2 May, 2014 in Vienna, Austria, id.5226
Scientific Publication
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