干旱区生态环境知识资源中心(Arid): Rapid In Situ Characterization of Soil Erodibility With a Field Deployable Robot

Arid

DOI	10.1029/2018JF004887
	Rapid In Situ Characterization of Soil Erodibility With a Field Deployable Robot
	Qian, Feifei 1; Lee, Dylan 2; Nikolich, George 3; Koditschek, Daniel 1; Jerolmack, Douglas 2,4
通讯作者	Jerolmack, Douglas
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
ISSN	2169-9003
EISSN	2169-9011
出版年	2019
卷号	124 期号:5 页码:1261-1280
英文摘要	Predicting the susceptibility of soil to wind erosion is difficult because it is a multivariate function of grain size, soil moisture, compaction, and biological growth. Erosive agents like plowing and grazing also differ in mechanism from entrainment by fluid shear; it is unclear if and how erosion thresholds for each process are related. Here we demonstrate the potential to rapidly assemble empirical maps of erodibility while also examining what controls it, using a novel plowing test of surface-soil shear resistance ((r)) performed by a semi-autonomous robot. Field work at White Sands National Monument, New Mexico, United States, examined gradients in erodibility at two scales: (i) soil moisture changes from dry dune crest to wet interdune (tens of meters) and (ii) downwind-increasing dune stabilization associated with growth of plants and salt and biological crusts (kilometers). We found that soil moisture changes of a few percent corresponded to a doubling of (r), a result confirmed by laboratory experiments, and that soil crusts conferred stability that was comparable to moisture effects. We then compared different mechanisms of mechanical perturbation in a controlled laboratory setting. A new kick-out test determines peak shear resistance of the surface soil as a proxy for yield strength. Kick-out resistance exhibited a relation with soil moisture that was distinct from the plowing test and that was correlated with the independently measured threshold-fluid stress for wind erosion. Results show that our new method maps soil erodibility in arid environments and provides an understanding of environmental controls on variations in soil erodibility.
英文关键词	erodibility legged robot shear strength
类型	Article
语种	英语
国家	USA
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000472611000011
WOS关键词	SANDS DUNE FIELD ; WIND EROSION ; LAND-USE ; AGGREGATE STABILITY ; WHITE SANDS ; FRICTION VELOCITY ; TENSILE-STRENGTH ; SAHARAN DUST ; SHEAR-STRESS ; DESERT
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	Desert Research Institute
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217090
作者单位	1.Univ Penn, Elect & Syst Engn, Philadelphia, PA 19104 USA; 2.Univ Penn, Earth & Environm Sci, Philadelphia, PA 19104 USA; 3.Desert Res Inst, Div Atmospher Sci, Las Vegas, NV USA; 4.Univ Penn, Mech Engn & Appl Mech, Philadelphia, PA 19104 USA
推荐引用方式 GB/T 7714	Qian, Feifei,Lee, Dylan,Nikolich, George,et al. Rapid In Situ Characterization of Soil Erodibility With a Field Deployable Robot[J]. Desert Research Institute,2019,124(5):1261-1280.
APA	Qian, Feifei,Lee, Dylan,Nikolich, George,Koditschek, Daniel,&Jerolmack, Douglas.(2019).Rapid In Situ Characterization of Soil Erodibility With a Field Deployable Robot.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,124(5),1261-1280.
MLA	Qian, Feifei,et al."Rapid In Situ Characterization of Soil Erodibility With a Field Deployable Robot".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 124.5(2019):1261-1280.