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Airflow and sediment dynamics in the vicinity of a dryland valley

Airflow and sediment dynamics in the vicinity of a dryland valley
Airflow and sediment dynamics in the vicinity of a dryland valley
The interaction of airflow and valley topography can have a significant effect on wind strength and direction and, particularly in dryland environments, this may have important implications on the pattern of aeolian sediment erosion, transport and deposition. This paper presents a first attempt to quantify the impact of incised valley topography on airflow patterns using measurements from both field and wind tunnel investigations.
We present preliminary Particle Image Velocimetry (PIV) data from wind tunnel measurements within a 1:1000 scale model of a typical 200 m wide and 40 m deep incised valley. These results are compared to wind data collected along a series of transects across a dryland valley in central Namibia. The results suggest significant alteration of flow upwind, within and downwind of the valley section and these are discussed with reference to sand transport capabilities and aeolian bedform dynamics.
Garvey, Brian
1dc781aa-8c38-4056-87a0-3d1cfe3c773a
Wiggs, G.
30c5e649-15fb-405d-ab40-b5ddc1f852a8
Castro, I.
66e6330d-d93a-439a-a69b-e061e660de61
Bullard, J.
d2861642-d5ec-4404-af0d-9cf76a01f91f
Garvey, Brian
1dc781aa-8c38-4056-87a0-3d1cfe3c773a
Wiggs, G.
30c5e649-15fb-405d-ab40-b5ddc1f852a8
Castro, I.
66e6330d-d93a-439a-a69b-e061e660de61
Bullard, J.
d2861642-d5ec-4404-af0d-9cf76a01f91f

Garvey, Brian, Wiggs, G., Castro, I. and Bullard, J. (2000) Airflow and sediment dynamics in the vicinity of a dryland valley. UWERN Annual Conference 2000. 18 - 20 Dec 2000.

Record type: Conference or Workshop Item (Other)

Abstract

The interaction of airflow and valley topography can have a significant effect on wind strength and direction and, particularly in dryland environments, this may have important implications on the pattern of aeolian sediment erosion, transport and deposition. This paper presents a first attempt to quantify the impact of incised valley topography on airflow patterns using measurements from both field and wind tunnel investigations.
We present preliminary Particle Image Velocimetry (PIV) data from wind tunnel measurements within a 1:1000 scale model of a typical 200 m wide and 40 m deep incised valley. These results are compared to wind data collected along a series of transects across a dryland valley in central Namibia. The results suggest significant alteration of flow upwind, within and downwind of the valley section and these are discussed with reference to sand transport capabilities and aeolian bedform dynamics.

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More information

Published date: 2000
Venue - Dates: UWERN Annual Conference 2000, 2000-12-18 - 2000-12-20

Identifiers

Local EPrints ID: 21351
URI: https://eprints.soton.ac.uk/id/eprint/21351
PURE UUID: f4919f0e-4ba1-4ac9-bb3f-71a5168ed401

Catalogue record

Date deposited: 20 Feb 2007
Last modified: 17 Jul 2017 16:26

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Contributors

Author: Brian Garvey
Author: G. Wiggs
Author: I. Castro
Author: J. Bullard

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