Arid
DOI10.1029/2006WR004895
Enhancement of wind erosion by fire-induced water repellency
Ravi, Sujith; D’Odorico, Paolo; Herbert, Bruce; Zobeck, Ted; Over, Thomas M.
通讯作者Ravi, Sujith
来源期刊WATER RESOURCES RESEARCH
ISSN0043-1397
出版年2006
卷号42期号:11
英文摘要

[ 1] The occurrence of fire and the subsequent increase in wind erosion are known to affect vegetation dynamics in dryland landscapes. Fires act as a disturbance on shrubs and trees and expose the soil surface to the erosive action of wind, thereby affecting the loss and redistribution of soil nutrients. Despite the relevance of wind erosion and fires to the dynamics of arid ecosystems, the interactions between these two processes remain poorly understood. We have investigated how a representative water repellent organic compound released by burning biomass and absorbed in the soil may enhance soil erodibility. To this end, we carried out a series of wind tunnel experiments, laboratory tests, and theoretical analyses to assess the effect of fire-induced water repellency on the soil susceptibility to wind erosion. The experiments were carried out using clean, well-sorted sand which was artificially coated with palmitic acid, a common water repellency inducing fatty acid found in most plants. The results indicate that fire-induced water repellency enhances soil erodibility, causing a drop in wind erosion threshold velocity. The results are explained by the effect of water repellent compounds on soil-water contact angle and on the strength of interparticle wet-bonding forces.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000242748200002
WOS关键词AIR-DRY SOILS ; MANAGEMENT ; HUMIDITY ; VELOCITY ; SAVANNAS ; TEMPERATURE ; ENTRAINMENT ; COEXISTENCE ; VEGETATION ; SEDIMENT
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/153204
作者单位(1)Univ Virginia, Dept Environm Sci, Charlottesville, VA 22903 USA;(2)Texas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843 USA;(3)ARS, Wind Eros & Water Conservat Serv, USDA, Lubbock, TX 79415 USA;(4)Eastern Illinois Univ, Dept Geol & Geog, Charleston, IL 61920 USA
推荐引用方式
GB/T 7714
Ravi, Sujith,D’Odorico, Paolo,Herbert, Bruce,et al. Enhancement of wind erosion by fire-induced water repellency[J],2006,42(11).
APA Ravi, Sujith,D’Odorico, Paolo,Herbert, Bruce,Zobeck, Ted,&Over, Thomas M..(2006).Enhancement of wind erosion by fire-induced water repellency.WATER RESOURCES RESEARCH,42(11).
MLA Ravi, Sujith,et al."Enhancement of wind erosion by fire-induced water repellency".WATER RESOURCES RESEARCH 42.11(2006).
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