Geography
[edit]
Dukhan is in the municipality of Al-Shahaniya and is approximately 84 kilometres (52 mi) from the capital Doha.
A mushroom-shaped erosional rock formation in Dukhan
The southeasternmost section of the area is 60 metres (200 ft) above sea level. Parts of Dukhan's sabkha zone in the north are several metres below sea level. The coastal region contains parallel formations of Eocene limestone, forming a series of low hills. The top of the Rus Formation from the Lower Eocene period outcrops more than 25 metres (82 ft) in this area. The eastern portion comprises a lowland covered with rock fragments, consisting of wadis and vegetation-rich depressions (known as rawdas). Wadi Diab is one of the major dry riverbeds which extend through Dukhan.
The Dukhan area has varied landforms and is considered one of the five main regions of Qatar. Its width varies from about 3 kilometres (1.9 mi) in the north to 19 kilometres (12 mi) in the center and 6 kilometres (3.7 mi) in the south. The total length of the Dukhan region is approximately 87 kilometres (54 mi). Ras Abrouq serves as the northern boundary while An Nakhsh serves as the southern boundary.
A sabkha (a type of salt flat) ecosystem known as the Dukhan Sabkha is found in the northern section. This sabkha, considered the largest inland salt flat in the Persian Gulf, runs for approximately 20 kilometres (12 mi), occupies an area of 73 km2 (28 sq mi), has a width of 2 kilometres (1.2 mi) to 4 kilometres (2.5 mi) km and a depth of between 6 metres (20 ft) and 7 metres (23 ft). It also accommodates the lowest point of Qatar, at 6 metres (20 ft) below sea level. Due to its high uranium content, the sabkha has elevated levels of radioactivity, with measurements ranging from 16 to 75 cps. The sabkha is fed by seawater from the Bay of Zekreet, approximately 3 kilometres (1.9 mi) north. A depression known as Rawdat Jarrah is the midpoint between the Bay of Zekreet and the sabkha; geologists have theorized that it may have been an extension of the bay as early as 3,000 years ago.
In a 2010 survey of Dukhan's coastal waters conducted by the Qatar Statistics Authority, it was found that its average depth was 5 meters (16 ft) and its average pH was 8.1. Furthermore, the waters had a salinity of 64.40 psu, an average temperature 23.5°C and 6.77 mg/L of dissolved oxygen.
Jebel Dukhan[edit]
Jebel Dukhan is a range of uniquely shaped hills varying from 100 feet (30 m) to 300 feet (91 m) above the level of the surrounding country, the surface being light sandy soil with a lot of loose stone.
Dukhan anticline[edit]
The Dukhan Oil Field is situated on the Dukhan anticline, a group of folds which runs in a north northwest to south southeast direction parallel with the western coast. The Dukhan anticline, with its thin lengthened structure and moderately steep dips stands out from the greater part of the neighboring folds. This has prompted some geologists to associate its formation with deep-seated salt movement. The overall length of the anticline is roughly 80 kilometres (50 mi) above the lowest closing contour. Jebel Nakhsh lies at the southern boundary of the anticline. The Dukhan anticline demonstrates a range in the extremity of folding along its length, with the folding of the northern part being more pronounced than the southern.
Wildlife[edit]
A Bedouin herding his camels in Dukhan, photographed in 2006
Pastoralism has historically been dominant among the nomads of the area as many areas of Dukhan offer suitable grazing territory for camels. Once oil activities commenced, grazing camels often suffered ill-effects from oil pollution and litter. Some camels unknowingly consume residue and waste material left over from oil extraction and become sick. Furthermore, camels may come into contact with sensitive infrastructure, such as switches for oil wells and fences. Incidents have been recorded of camels causing leakages in oil wells, turning off oil wells and injuring themselves on such installations. It was reported in 1992 that oftentimes, camels crossing the roads around Dukhan were the cause of fatal motor accidents, particularly at night. In the early days of Dukhan's oil operations, livestock owners would be compensated by QatarEnergy for any incidents resulting in the death of their camels, however, this precedent was overruled in 1985, with the new official position stating that pastoralists were to be held responsible for their livestock.
Common flora in the area used for livestock grazing include zygophyllum qatarense, vachellia tortilis, blue-stem grass (Hyparrhenia hirta), and gazelle's horn (Lotus halophilus), which grows in depressions. Near Jebel Dukhan, plants found here include athl (Tamarix aucheriana) Arabian primrose (Arnebia decumbens), shabraq (Ononis reclinata), qartam barie (Carthamnus eriocephalus), and ghebayra (Herniaria hirsuta).
Qalam (Arthrocaulon macrostachyum) grows in salt marshes. Torba (Silene conica) occurs rarely on the side of the highway. Desert thumbs (Cynomorium coccineum) and marsh fleabane (Pluchea dioscoridis) commonly grow around the sewage water treatment plant.
Other common vegetation found in Dukhan include buck's horn plantain (Plantago coronopus), eyelash plant (Blepharis ciliaris), jebira (Bassia muricata) on compressed gypsum soils, reeds (Phragmites australis) in wet areas, halaq (Astragalus annularis), raqrouq (Helianthemum kahiricum), lebena (Euphorbia peplus), tiny bristle grass (Rostraria pumila) in lawns and gardens, kebaisha (Erodium glaucophyllum), samah (Mesembryanthemum cryptanthum), woolly-winged milkwort (Polygala erioptera) and marak (Leptadenia pyrotechnica) near the coast.
The buffer zone of the Al Reem Biosphere Reserve starts at a point slightly north of the city.
Climate[edit]
The following is climate data for Dukhan obtained from the Qatar Statistics Authority. Dukhan has a hot arid climate (Koppen: BWh).
Climate data for Dukhan
Month
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Mean daily maximum °C (°F)
22.5(72.5)
25(77)
30(86)
36(97)
42(108)
44(111)
45(113)
44.5(112.1)
41.5(106.7)
37(99)
30(86)
23.5(74.3)
35.1(95.2)
Mean daily minimum °C (°F)
15(59)
16.5(61.7)
20(68)
25(77)
30(86)
32.5(90.5)
34(93)
33.5(92.3)
32(90)
26.5(79.7)
23.5(74.3)
17(63)
25.5(77.9)
Average precipitation mm (inches)
10(0.4)
2(0.1)
2.5(0.10)
6(0.2)
1(0.0)
0(0)
0(0)
0(0)
0(0)
0.5(0.02)
13(0.5)
19.5(0.77)
54.5(2.09)
Average relative humidity (%)
68
67
63
58
53
54
57
63
67
70
75
82
65
Source: Qatar Statistics Authority