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dc.contributor.authorBigl, Matthew F.
dc.contributor.authorLeGrand, Sandra L.
dc.contributor.authorBeal, Samuel A.
dc.contributor.authorSopher, Ariana M.
dc.contributor.authorRingelberg, David B.
dc.date.accessioned2019-08-12T13:19:52Z
dc.date.available2019-08-12T13:19:52Z
dc.date.issued2019-08
dc.identifier.govdocERDC/CRREL TR-19-16
dc.identifier.urihttps://hdl.handle.net/11681/33723
dc.identifier.urihttp://dx.doi.org/10.21079/11681/33723
dc.descriptionTechnical Report
dc.description.abstractPlayas (dry lakebeds), which are often used as stable surfaces for landing zones and ground maneuver, can also be prolific sources of dust. Accurate prediction of playa susceptibility to dust emission is essential for military operations in arid regions. The goal of this study was to determine if methodologies originally developed for bench-scale laboratory analyses of surficial salt-crust features common to playas could also be used to create macroscale samples for dust-related research applications in a large-scale in-door testing facility. Playa salt crust conditions were simulated on six meter-scale plots (2 m × 2 m) and one large-scale plot (7.3 m × 5.5 m) of compacted, well-mixed loamy soil by controlling climatic parameters, the water-delivery mechanism, and surface-soil heating. The resulting simulated-playa surfaces were characterized for developed crust thickness, compressive and shear strength, chemical composition, and dust-emission potential. Resultant crust attributes varied; however, all methods tested developed simulated playas with physical conditions that were comparable to real-world analogues. Although chemical composition was not evaluated in our real-world comparison, we found that our water delivery method had a statistically significant effect on the chemical attributes of the simulated crusts.en_US
dc.description.provenanceSubmitted by Jered Lambiotte (jered.h.lambiotte@usace.army.mil) on 2019-08-12T13:19:51Z No. of bitstreams: 1 ERDC-CRREL TR-19-16.pdf: 4388768 bytes, checksum: 60467d3f5202635b1d6b5fb2d7846913 (MD5)en
dc.description.provenanceMade available in DSpace on 2019-08-12T13:19:52Z (GMT). No. of bitstreams: 1 ERDC-CRREL TR-19-16.pdf: 4388768 bytes, checksum: 60467d3f5202635b1d6b5fb2d7846913 (MD5) Previous issue date: 2019-08en
dc.description.sponsorshipUnited States. Office of the Assistant Secretary of the Army for Acquisition, Logistics, and Technology.en_US
dc.description.tableofcontentsAbstract .......................................................................................................................................................... ii Figures and Tables ........................................................................................................................................ iv Preface ...........................................................................................................................................................vii Acronyms and Abbreviations ................................................................................................................... viii Unit Conversion Factors ............................................................................................................................. xi 1 Introduction ............................................................................................................................................ 1 1.1 Background ..................................................................................................................... 1 1.2 Objectives ........................................................................................................................ 2 1.3 Approach ......................................................................................................................... 2 2 Methods .................................................................................................................................................. 4 2.1 Meter-scale test-plot design, configuration, and treatment ......................................... 4 2.2 Large-scale test-plot design and treatment .................................................................. 8 2.3 Crust sampling and analysis ........................................................................................ 11 3 Results and Discussion ...................................................................................................................... 14 3.1 Meter-scale test plot—climate control and soil moisture ............................................ 14 3.2 Large-scale test plot—climate control and soil moisture ............................................ 17 3.3 Large- and meter-scale test-plot chemistry ................................................................. 21 3.4 Large- and meter-scale test-plot physical crusting ..................................................... 26 3.5 Real-world comparison ................................................................................................. 35 4 Conclusions .......................................................................................................................................... 37 4.1 Saltwater-delivery methods .......................................................................................... 37 4.2 Salinity variation ........................................................................................................... 37 4.3 Climate control .............................................................................................................. 37 4.4 Crust characteristics ..................................................................................................... 38 5 Recommendations .............................................................................................................................. 39 References ................................................................................................................................................... 41 Appendix A: Real-World Playa Soil Texture Data .................................................................................. 44 Appendix B: Simulated Crust Chemistry Data ...................................................................................... 48 Appendix C: Full Statistical Results ........................................................................................................ 50 Report Documentation Page
dc.format.extent72 pages / 4.185 Mb
dc.format.mediumPDF/A
dc.language.isoen_USen_US
dc.publisherCold Regions Research and Engineering Laboratory (U.S.)en_US
dc.publisherEngineer Research and Development Center (U.S.)
dc.relation.ispartofseriesTechnical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/CRREL TR-19-16
dc.rightsApproved for Public Release; Distribution is Unlimited
dc.sourceThis Digital Resource was created in Microsoft Word and Adobe Acrobat
dc.subjectDusten_US
dc.subjectDust emissionen_US
dc.subjectDust stormsen_US
dc.subjectEngineered environmenten_US
dc.subjectGroundwater processesen_US
dc.subjectPlayasen_US
dc.subjectSalt Crusten_US
dc.subjectVehicles, Militaryen_US
dc.titleMacroscale salt-crust formation on indoor playa-like test plots for dust-emission research applications : methodology assessmenten_US
dc.typeReporten_US


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