Umm Al Zumoul, UAE
An almost never-ending sea of sand in the Umm Al Zumoul area of southeastern UAE.
This extensive region comprises older stable north-west/south-east linear dunes and intervening deflation flats. Occasional nested barchanoid dunes occur where more recent wind-blown sands have accumulated. The region includes broad, gently inclined sand ramps which may display a partial cover of fine lag gravels. The dark color in the basin is from chocolate-colored gravel.
Map Unit: Typic Torripsamments consociation, very high dunes and flats
This map unit consists of narrow sinuous dune ridges that form linear or roughly rectangular patterns around deflation plains and inland sabkha flats. The dunes have a relative relief of about 80m. Dune formations are variable due to multi-directional winds, and include barchanoid, transverse and star shapes. The star dunes are often higher than the surrounding dunes and form impressive and imposing features in the landscape. A white, gray or red surface veneer of fine to coarse sand and fine gravel occurs on the gentle slopes of the dunes adjacent to the sabkhas and deflation plains.
Small areas of sabkha flat are included within this map unit. The map unit occurs as linear polygons in the south-eastern part of the area adjacent to Oman and Saudi Arabian border. Polygons range in size from 60ha to 94,557ha. The land is used as low-density grazing. The map unit has sparse vegetation cover with Cyperus conglomeratus and Zygophyllum spp on the lower slopes of the dunes together with Calligonum comosum on the slopes and slip faces. The map unit forms part of the Cyperetum-Zygophylletum vegetation community.
The soils of this map unit are dominated by Typic Torripsamments, mixed, hyperthermic (85% AD158) in the high dunes. Other soils are Typic Petrogypsids, sandy, mixed, hyperthermic (5% AD123), Petrogypsic Haplosalids, sandy, mixed, hyperthermic (5% AD143) and Gypsic Haplosalids, sandy, mixed, hyperthermic (5% AD135) that are confined to the deflation flats. Steep, high dunes are the major constraint to land use in this map unit.
For more information about soil classification using the UAE Keys to Soil Taxonomy, visit:
agrifs.ir/sites/default/files/United%20Arab%20Emirates%20...
Umm Al Zumoul, UAE
An almost never-ending sea of sand in the Umm Al Zumoul area of southeastern UAE.
This extensive region comprises older stable north-west/south-east linear dunes and intervening deflation flats. Occasional nested barchanoid dunes occur where more recent wind-blown sands have accumulated. The region includes broad, gently inclined sand ramps which may display a partial cover of fine lag gravels. The dark color in the basin is from chocolate-colored gravel.
Map Unit: Typic Torripsamments consociation, very high dunes and flats
This map unit consists of narrow sinuous dune ridges that form linear or roughly rectangular patterns around deflation plains and inland sabkha flats. The dunes have a relative relief of about 80m. Dune formations are variable due to multi-directional winds, and include barchanoid, transverse and star shapes. The star dunes are often higher than the surrounding dunes and form impressive and imposing features in the landscape. A white, gray or red surface veneer of fine to coarse sand and fine gravel occurs on the gentle slopes of the dunes adjacent to the sabkhas and deflation plains.
Small areas of sabkha flat are included within this map unit. The map unit occurs as linear polygons in the south-eastern part of the area adjacent to Oman and Saudi Arabian border. Polygons range in size from 60ha to 94,557ha. The land is used as low-density grazing. The map unit has sparse vegetation cover with Cyperus conglomeratus and Zygophyllum spp on the lower slopes of the dunes together with Calligonum comosum on the slopes and slip faces. The map unit forms part of the Cyperetum-Zygophylletum vegetation community.
The soils of this map unit are dominated by Typic Torripsamments, mixed, hyperthermic (85% AD158) in the high dunes. Other soils are Typic Petrogypsids, sandy, mixed, hyperthermic (5% AD123), Petrogypsic Haplosalids, sandy, mixed, hyperthermic (5% AD143) and Gypsic Haplosalids, sandy, mixed, hyperthermic (5% AD135) that are confined to the deflation flats. Steep, high dunes are the major constraint to land use in this map unit.
For more information about soil classification using the UAE Keys to Soil Taxonomy, visit:
agrifs.ir/sites/default/files/United%20Arab%20Emirates%20...