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Uploaded on:
13/02/2009 06:13:56
Type:
Digital Asset
File Size:
165.86 KB
Dimensions:
1000 x 762 pixels
1874 views 4 downloads
P number: P000312
Old photograph number: B00814
Caption: Culbin sand-hills. Morayshire. Arrest of drifting sand by tufts of bent. (Psamma arenaria.) Notice how the sand builds up around the tufts. Advancing sand-dune in distance on right.
Description: Culbin sand-hills. Morayshire. Arrest of drifting sand by tufts of bent. (Psamma arenaria.) Notice how the sand builds up around the tufts. Advancing sand-dune in distance on right. The direction of drift is almost towards observer, i.e. from west to east. The main advantage of planting bent or, as later, marram grass, is that it creates a boundary layer above which the wind blows. At the surface is a area of calm air and hence sand grains are less likely to be blown. The grasses have a long network of roots, they are also drought and salt resistant - ideal for this environment.
Date taken: 01/01/1912
Photographer: Lunn, R.
Copyright statement: Crown
Acknowledgment: This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network
X longitude/easting: 298500
Y latitude/northing: 861500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 165.86 KB; 1000 x 762 pixels; 85 x 65 mm (print at 300 DPI); 265 x 202 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Landforms, wind/ Sand-dunes  

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