Departmental Papers (ESE)

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Abstract

Measurements used to study wind shear stress and turbulence, surface roughness, sand flux, and dust emissions are typically obtained from stationary instrumentation, and are thus limited spatially. They are also dependent on deployment of instrumentation for specific events and thus the are limited temporally. We have been adapting a rough-terrain legged robot capable of rapidly traversing desert terrain to serve as a semi-autonomous, reactive mobile sensory platform (RHex [1]), which would not share these limitations. We report on early trials of the robotic platform at the Jornada LTER and White Sands National Monument to test the feasibility of gathering measurements of airflow and rates of particle transport on a dune, assessing the role of roughness elements such as vegetation in modifying the wind shear stresses incident on the surface, and estimating erosion susceptibility in an arid soil. The robot not only serves as a mobile platform for science instruments; it can also perform controlled “kick tests” to locally examine soil strength. We outline a strategy for mapping soil erodibility and its controlling parameters using the unique capabilities of RHex, and the implications for understanding erosion and dust emission from complex terrain.

Sponsor Acknowledgements

This work is supported in part by NSF INSPIRE Award 1514882, “Legged Locomotion for Desert Research.” The authors would like to thank the DRI and USDA for the use of its facilities, Shiv Dalla and Lawrence Gardner for manufacturing and experimentation, and Diedra Krieger for administrative assistance.

Document Type

Other

Subject Area

GRASP, Kodlab

Date of this Version

2015

Publication Source

American Geophysical Union Conference

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Date Posted: 03 August 2018

This document has been peer reviewed.