Accession Number:

AD1081312

Title:

Quantifying Turbulent Shear Stress in "Real" Landscapes

Descriptive Note:

Technical Report,01 Jan 2015,30 Sep 2015

Corporate Author:

University of Arizona Tucson United States

Personal Author(s):

Report Date:

2018-07-01

Pagination or Media Count:

5.0

Abstract:

Major Goals The wind velocity profile and the turbulent shear stresses exerted on the ground that drive aeolian sediment transport depend on the value of the aerodynamic roughness length, z0. The goal of this work was to better understand the controls on z0 values, especially in landscapes with multi-scale topography and in the presence of aeolian sediment transport. Multi-scale topography is ubiquitous in nature, yet previous empirical models for predicting z0 rely on the concept of a dominant roughness element or scale of roughness that must be assumed a priori. Aeolian transport has long been known to increase z0, but the relative importance of topography and sediment transport had not been determined under field conditions prior to this study.

Subject Categories:

  • Hydrology, Limnology and Potamology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE