An evolutionary model for sabkha development on the north coast of the UAE

Al-Farraj, Asma

doi:10.1016/j.jaridenv.2005.01.025

Cited by 45 publications

(21 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These inter-digitate with lagoonal and salt flat (sabkha) deposits (Purser, 1973;al-Farraj, 2005), and extend well below present sealevel. The desert coastline region is characterised by beaches, bars, spits and coastal sabkhas (Goudie et al, 2000c) with major khor and spit complexes at Ras al-Khaimah, Jazirat al-Hamra (Goudie et al, 2000c) and at Umm al-Qawain (Bernier et al, 1995).…”

Section: Coastal Evolution Sediments and Sabkhasmentioning

confidence: 88%

Geomorphological and palaeoenvironmental investigations in the southeastern Arabian Gulf region and the implication for the archaeology of the region

Parker

Goudie

2008

Geomorphology

View full text Add to dashboard Cite

Section: Coastal Evolution Sediments and Sabkhasmentioning

confidence: 88%

Geomorphological and palaeoenvironmental investigations in the southeastern Arabian Gulf region and the implication for the archaeology of the region

Parker

Goudie

2008

Geomorphology

View full text Add to dashboard Cite

“…As the sea level rose, it reached its present level~8400-4000 yr at different times and locations, depending on elevation. According to Kassler (1973), Weijermars (1999), and Al-Farraj (2005), the sea continued to rise more slowly between 1 and 2 m above present sea level with peak flooding at 5000 yr, before it receded again to its present level (Bernier et al, 1995;Lambeck, 1996;Kirkham, 1997Kirkham, , 1998Williams and Walkden, 2002;Kennett and Kennett, 2007). The timing of the Holocene peak flooding varies according to author and location along the margin of the Gulf basin.…”

Section: Quaternary Sea-level Changes As Inferred From the Arabian Gumentioning

confidence: 99%

“…The Strait of Hormuz ( Fig. 2) opened~14,000 yr, and between 12,000 and 6000 yr the sea transgressed more than 1000 km into the Arabian Gulf area at a rate that may at times have exceeded 1 km/yr (Kassler, 1973;Weijermars, 1999;Teller et al, 2000;Al-Farraj, 2005;Bruthans et al, 2006;Parker and Goudie, 2008). As the sea level rose, it reached its present level~8400-4000 yr at different times and locations, depending on elevation.…”

Section: Quaternary Sea-level Changes As Inferred From the Arabian Gumentioning

confidence: 99%

AMS-dated mollusks in beach ridges and berms document Holocene sea-level and coastal changes in northeastern Kuwait Bay

Reinink-Smith

2015

Quat. res.

View full text Add to dashboard Cite

In northeastern Kuwait, ancient beach ridges and associated berms are separated from the present shoreline by a 4-6 km-wide sabkha. A diverse mollusk fauna in the beach ridges attests to a former open marine environment. A total of 21 AMS dates were obtained in this study. Thirteen mollusk samples from beach ridges yielded AMS dates ranging from~6990 cal yr BP in the southeast to~3370 cal yr BP in the northwest, suggesting a southeast to northwest age progression during the Holocene transgression. In contrast, four samples from berms throughout the study area yielded AMS dates of 5195-3350 cal yr BP showing no age progression; these berms consist largely of Conomurex persicus gastropods that aggregated by storms during a highstand at 5000-3500 cal yr BP. The berms are presently at~+ 6 m above sea level, 2-3 m above the beach ridges. Human settlements were common on the ridge crests before and after the highstand. Regression to present-day sea level commenced after the highstand, which is when the sabkha began forming. A landward, marine-built terrace, which yielded AMS dates N43,500 14 C yr BP, probably formed during Marine Oxygen Isotope Stage 5e and hence is not genetically related to the beach ridges.

show abstract

“…Fluids inside the sediments crystalized gypsum as they saturated with calcium sulphate. [2,14] have described the evolution of sabkha in the study area in 6 phases, based on different tidal environments including subtidal flats (khors) and intertidal channels, lagoons (intertidal flats) and supratidal flats [2] .…”

Section: Geologic Setting Of Sabkhamentioning

confidence: 99%

Mapping Sabkha Land Surfaces in the United Arab Emirates (UAE) using Landsat 8 Data, Principal Component Analysis and Soil Salinity Information

Abuelgasim¹,

Ammad²

2017

IJEM

View full text Add to dashboard Cite

Sabkha is an Arabic word for a salt-flat area found mainly along arid area coastlines and inlands within sand dunes areas. The sabkha that form within the sand are relatively flat and very saline areas of sand or silt that forms just above the water-table where the sand is cemented together by evaporite salts from seasonal ponds. Such shallow water is normally highly saline. Here the crust is rich in gypsum and halite veins where the underline thin layer is made of sand and silt. Such sabkha have an average thickness of a meter or slightly less. On the other hand, marine sabkha represent transitional environments between the land and the sea. The UAE is home to some of the largest concentrations of sabkha both coastal and inland. The coastal areas of Abu Dhabi include several small shoals, islands, protected lagoons, channels and deltas, an inner zone of intertidal flats with algal mats and broad areas of supratidal sabkha salt flats.Identifying sabkha habitats from remotely sensed data is a challenging process. Traditional classification techniques of multispectral data alone, usually fail to properly identify sabkha pixels or provide lower rates of mapping accuracy for sabkha habitats. The primary objective of this research is to develop a much more accurate methodology for properly mapping and identifying sabkha areas from remotely sensed data. Properly mapping sabkha habitats from remotely sensed data is the first steps towards studying the ecological changes within such habitats using earth observation techniques. Furthermore, sabkha habitats can in certain situations be a geotechnical hazard due to its highly salinity and with adverse effects on concrete, asphalt, steel and other structures, in addition to their sporadic heaves and collapses. As the UAE continue to build major infrastructure and development projects identifying the location of such habitats is vitally important.In this research a new technique that combines the multispectral information of Landsat 8, principal component analysis and spectral soil salinity detection is developed. The study area is located in the western part of the UAE along the border with the Kingdom of Saudi Arabia, an area known to include large tracks of inland and coastal sabkha. Landsat 8 data from path 161 and row 43 was acquired for the study. A multi-source classification approach was followed that utilizes the multispectral data of Landsat 8 along with components from the principal components analysis and the spectral salinity index maps. The preliminary results confirmed * Corresponding author. Tel.: E-mail address: 2 Mapping Sabkha Land Surfaces in the United Arab Emirates (UAE) using Landsat 8 Data, Principal Component Analysis and Soil Salinity Informationby field observations show that the combined data improved the classification accuracy to almost 90% in comparison to multispectral data alone of 78%.

show abstract

An evolutionary model for sabkha development on the north coast of the UAE

Cited by 45 publications

References 22 publications

Geomorphological and palaeoenvironmental investigations in the southeastern Arabian Gulf region and the implication for the archaeology of the region

Geomorphological and palaeoenvironmental investigations in the southeastern Arabian Gulf region and the implication for the archaeology of the region

AMS-dated mollusks in beach ridges and berms document Holocene sea-level and coastal changes in northeastern Kuwait Bay

Mapping Sabkha Land Surfaces in the United Arab Emirates (UAE) using Landsat 8 Data, Principal Component Analysis and Soil Salinity Information

Contact Info

Product

Resources

About