Twentieth century dune migration at the Great Sand Dunes National Park and Preserve, Colorado, relation to drought variability

Auteurs :
MARÍN, L.
FORMAN, S.L.
VALDEZ, A.
BUNCH, F.

Description :
To evaluate the response of the active parabolic and barchanoid dunes, a time series of remote sensed images from 1936 to 1999 is studied, using image analysis and Geographic Information System (GIS) techniques and complemented wih field assessment. The extent of dune migration is evaluated with respect to climate parameters like precipitation and Palmer Drought Severity Index (PDSI) to better understand the landscape response to varying drought in the twentieth century. This contribution provides insight into how semiarid landscapes respond to drought and quantifies thresholds and rates for dune migration at the Great Sand Dunes National Park and Preserve.


Type de document :
Article de périodique

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 2005, vol. 70, n°. 1-2, p. 163-183, nombre de pages : 21, Collation : Illustration, Références bibliographiques : 59 ref.

Date :
2005

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier