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Margaret M. Darrow
University of Alaska Fairbanks
GeomorphologyGeologyPermafrostLandslideGeotechnical engineering
29Publications
5H-index
103Citations
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Publications 34
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Abstract Most frozen soils contain unfrozen water – water that remains liquid at subfreezing temperatures – which affects a frozen soil's strength and contributes to frost heave. Among the variables that influence the flow of unfrozen water through a freezing soil is the presence of clay minerals and their adsorbed cations. Zeta potential (ζp) is one measure of clay mineral surface properties that may provide insight into the interaction of mineral surfaces with unfrozen water films; however, on...
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#1Margaret M. Darrow (UAF: University of Alaska Fairbanks)H-Index: 5
#2Ross M. Lieblappen (Vermont Technical College)
Abstract X-ray micro-computed tomography (μCT) scanning is a proven technique with applications in geoscience, soil science, and geotechnical engineering. Here we apply the technique to investigate the effects of cation treatments on clayey soil micro-fabric in a frozen state. We imaged six suites of frozen cation-treated soils (montmorillonite, kaolinite, illite, illite-smectite, chlorite, and Copper River heterogeneous soil) at a resolution of 8.17 μm. Although this resolution was insufficient...
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#1Wenyu Gong (CEA: China Earthquake Administration)H-Index: 7
#2Margaret M. Darrow (UAF: University of Alaska Fairbanks)H-Index: 5
Last. Ronald P. DaanenH-Index: 9
view all 4 authors...
Abstract Frozen debris lobes (FDLs) are slow-moving landslides along permafrost-affected slopes, and consist of soil, rock, organic debris, and areas of massive infiltration ice. Based on their proximity to the adjacent infrastructure, their size, and their flow dynamics, FDLs represent potential geohazards. Eight FDLs (FDL-A, -B, -C, -D, -4, -5, -7, -11) within the Dalton Highway corridor in the Brooks Range, Alaska, USA are the subject of this paper. We examined temporal and spatial variation ...
1 CitationsSource
#1Aaron M. Kruse (UAF: University of Alaska Fairbanks)H-Index: 1
#2Margaret M. Darrow (UAF: University of Alaska Fairbanks)H-Index: 5
Last. Satoshi AkagawaH-Index: 9
view all 3 authors...
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#1Margaret M. Darrow (UAF: University of Alaska Fairbanks)H-Index: 5
#2Ronald P. DaanenH-Index: 9
Last. Wenyu Gong (CEA: China Earthquake Administration)H-Index: 7
view all 3 authors...
Abstract Within the Brooks Range of Alaska, several frozen debris lobes (FDLs) – or slow-moving landslides in permafrost – are approaching critical infrastructure. FDL-A, the largest and closest of these features, was 32.3 m from the toe of the Dalton Highway as of October 2016. Here we present the analysis of nearly three years of data from a MEMS-based in-place inclinometer installed within FDL-A. Analysis of the strain within the active layer indicates that it is closely tied to air temperatu...
3 CitationsSource
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#1Aaron M. Kruse (UAF: University of Alaska Fairbanks)H-Index: 1
#2Margaret M. Darrow (UAF: University of Alaska Fairbanks)H-Index: 5
Abstract Unfrozen water within frozen soils is a key component that determines a soil's thermophysical response to changing physical and environmental conditions. The physicochemical nature of the clay component of fine-grained soils, including the adsorbed cations, strongly controls the amount and mobility of unfrozen water. Here we present the unfrozen water measurements of five standard clays and one heterogeneous soil. For each soil, we prepared a suite of the untreated soil and four cation ...
6 CitationsSource
#1Margaret M. Darrow (UAF: University of Alaska Fairbanks)H-Index: 5
#2David. D. Jensen (Alaska Department of Transportation & Public Facilities)H-Index: 1
Abstract Construction of roadway embankments over permafrost often results in settlement due to thawing of ice-rich foundation soils. The air convection embankment (ACE) is a relatively new design developed to reduce thaw settlement. In 2012 an ACE and an adjacent thermal berm were constructed as part of a realignment of the Taylor Highway near Lost Chicken Creek, Alaska. The Taylor Highway, a minor roadway with a gravel surface, is closed and not maintained during the winter months. To evaluate...
4 CitationsSource
#1Jocelyn M. Simpson (UAF: University of Alaska Fairbanks)H-Index: 3
#2Margaret M. Darrow (UAF: University of Alaska Fairbanks)H-Index: 5
Last. Trent D. Hubbard (Alaska Department of Natural Resources)H-Index: 2
view all 5 authors...
Frozen debris lobes (FDLs) are large masses of soil, rock, incorporated organic material, and ice moving down permafrost-affected slopes in the south-central Brooks Range, Alaska. In this paper, we focus on FDL-A, which is an impending geohazard to the Dalton Highway, located just under 40 m away from the highway embankment. We present the results of multi-faceted research, including field-based studies, laboratory testing of soil samples, slope stability analysis, and a GIS analysis. Subsurface...
4 CitationsSource
#1Margaret M. Darrow (UAF: University of Alaska Fairbanks)H-Index: 5
#2Nora L. Gyswyt (UAF: University of Alaska Fairbanks)H-Index: 1
Last. Trent D. HubbardH-Index: 2
view all 5 authors...
Abstract. Frozen debris lobes (FDLs) are elongated, lobate permafrost features that mostly move through shear in zones near their bases. We present a comprehensive overview of eight FDLs within the Dalton Highway corridor (southern Brooks Range, Alaska), including their catchment geology and rock strengths, lobe soil characteristics, surface movement measurements collected between 2012 and 2015, and analysis of historic and modern imagery from 1955 to 2014. Field mapping and rock strength data i...
5 CitationsSource
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