Geographical features of Bahrain
The
Kingdom of Bahrain
[1]
consists of
Bahrain Island
and 33 of the 37 Bahrain Islands, lying in the
Persian Gulf
's
Gulf of Bahrain
off the north shore of
West Asia
's
Arabian Peninsula
. Bahrain's capital city is
Manama
. The islands are about 24 kilometers (15 mi) off the east coast of
Saudi Arabia
and 28 kilometers (17 mi) from
Qatar
.
[2]
The total area of the country is about 694 square kilometers (268 sq mi), about four times the size of the
District of Columbia
.
[2]
Bahrain Island accounts for about 78% of the kingdom's land area, comprising 604 square kilometers (233 sq mi). It is 48 kilometers (30 mi) long from north to south and at its widest point stretches 16 kilometers (10 mi) from east to west. The island is surrounded by several of the
Middle East
's large
petroleum
fields and commands a strategic position amid the Persian Gulf's shipping lanes.
Geographical setting and islands
[
edit
]
Following the return of
Janan
to
Qatar
in March 2001, the state of Bahrain consists of 33 natural islands in the
Bahrain Islands
archipelago.
Around most of Bahrain is a relatively shallow inlet of the Persian Gulf known as the
Gulf of Bahrain
.
[2]
The seabed adjacent to Bahrain is rocky and, mainly off the northern part of the island, covered by extensive coral reefs.
[2]
Most of the island is a low-lying and barren desert.
[2]
Outcroppings of limestone form low rolling hills, stubby cliffs, and shallow
ravines
.
[2]
The limestone is covered by various densities of saline sand, capable of supporting only the hardiest desert vegetation ? chiefly thorn trees and scrub.
[2]
There is a fertile strip five kilometres wide along the northern coast on which
date
,
almond
,
fig
, and
pomegranate
trees grow.
[2]
The interior contains an
escarpment
that rises to 134 meters, the highest point on the island, to form
Jabal al Dukhan
(Mountain of Smoke), named for the mists that often wreathe the summit.
[2]
Most of the country's
oil wells
are situated in the vicinity of Jabal al Dukhan.
[2]
One author writes about the geology of the nation: "Bahrein lies on a portion of the ancient
Tethys Ocean
geosynclinal belt represented today by the Persian Gulf. The formation of the principal island is the result of pressure from the mountain masses of Persia against the crystalline platform of central Asia, the thrust being absorbed by gentle folding in the geosynclines. The structure of Bahrein is that of a large, single, closed dome covering the entire faulting".
Rocks exposed at the surface consist of:
- Recent sands and
coquinas
forming flat, raised beaches surrounding the island from which the surface rises gradually to an elevation 150 to 200 feet above sea level. At this point it breaks away into inward-facing cliffs eighty to one hundred feet high completely surrounding an oval central depression about twelve miles long and four wide.
- Pleistocene
sands, cross-bedded and probably wind-deposited, lying in the canyon.
- Miocene
silicious clay covering a very limited area.
- Eocene
limestone covering most of the island, the central region of which, known as “Jabal Dukh?n “Mountain of Smoke”, rises to a point 439 feet above sea level. The limestone is very porous and is the source of most of the water in the northern half of the island.
[3]
In addition to
Bahrain Island
, other islands of significance include
Nabih Saleh
, which is northwest of
Sitrah
;
Jidda Island
and
Umm as Sabaan
, to the north of
Umm a Nasan
; and a
group of islands
, the largest of which is
Hawar
, near the coast of Qatar.
[2]
Nabih Saleh contains several freshwater springs that are used to irrigate the island's the extensive date palm groves.
[2]
The rocky islet of
Jiddah
formerly housed the state prison
[2]
but has now been converted to a holiday resort.
[
citation needed
]
Hawar and the fifteen small islands near it are the subject of a territorial dispute between
Bahrain
and
Qatar
.
[2]
Hawar is nineteen kilometres long and about one and one-half kilometres wide.
[2]
The other islands (such as the
Al Garum Islands
) are uninhabited and are nesting sites for a variety of
migratory birds
.
[2]
Climate
[
edit
]
Bahrain features an
arid climate
.
[2]
Bahrain has two seasons: an extremely hot summer and a relatively mild winter.
[2]
During the summer months, from April to October, afternoon temperatures average 40 °C (104 °F) and can reach 46 °C (114.8 °F) during May, June and July.
[2]
The combination of intense heat and high humidity makes this season uncomfortable.
[2]
In addition, a hot, dry southwest wind, known locally as the qaws, periodically blows sand clouds across the barren southern end of Bahrain toward Manama in the summer.
[2]
Temperatures moderate in the winter months, from November to March, when the range is between 10 and 20 °C (50 and 68 °F).
[2]
However, humidity often rises above 90% in the winter.
[2]
From December to March, prevailing winds from the northwest, known as the
shamal
, bring damp air over the islands.
[2]
Regardless of the season, daily temperatures are fairly uniform throughout the archipelago.
[2]
Note that the coldest temperature ever recorded in Bahrain was on January 20, 1964, when it dropped to -5 °C (23 °F) in Awali and 2.7 °C (36 °F) at Bahrain International Airport.
[2]
That particular freeze was accompanied by a white-out, with icicles forming on trees and fences at Awali.
[2]
Bahrain receives little precipitation.
[2]
The average annual rainfall is 72 millimeters (2.8 in), usually confined to the winter months.
[2]
No permanent rivers or streams exist on any of the islands.
[2]
The winter rains tend to fall in brief, torrential downpours, flooding the shallow
wadis
that are dry the rest of the year and impeding transportation.
[2]
Little of the
rainwater
is saved for
irrigation
or drinking.
[2]
However, there are numerous natural
springs
in the northern part of Bahrain and on adjacent islands.
[2]
Underground
freshwater
deposits also extend beneath the Persian Gulf to the Saudi Arabian coast.
[2]
Since ancient times, these springs have attracted settlers to the archipelago.
[2]
Despite increasing salinization, the springs remain an important source of
drinking water
for Bahrain.
[2]
Since the early 1980s, however,
desalination
plants, which render
seawater
suitable for domestic and industrial use, have provided about 60% of daily water consumption needs.
[2]
Climate data for Bahrain International Airport (1991?2020, extremes 1946?2012)
|
Month
|
Jan
|
Feb
|
Mar
|
Apr
|
May
|
Jun
|
Jul
|
Aug
|
Sep
|
Oct
|
Nov
|
Dec
|
Year
|
Record high °C (°F)
|
31.7
(89.1)
|
34.7
(94.5)
|
40.0
(104.0)
|
41.7
(107.1)
|
46.7
(116.1)
|
46.6
(115.9)
|
47.4
(117.3)
|
45.7
(114.3)
|
45.5
(113.9)
|
42.8
(109.0)
|
37.2
(99.0)
|
30.6
(87.1)
|
47.4
(117.3)
|
Mean daily maximum °C (°F)
|
20.7
(69.3)
|
22.0
(71.6)
|
25.5
(77.9)
|
30.6
(87.1)
|
36.1
(97.0)
|
38.6
(101.5)
|
39.7
(103.5)
|
39.6
(103.3)
|
37.7
(99.9)
|
34.0
(93.2)
|
28.0
(82.4)
|
22.9
(73.2)
|
31.3
(88.3)
|
Daily mean °C (°F)
|
17.5
(63.5)
|
18.4
(65.1)
|
21.3
(70.3)
|
26.0
(78.8)
|
31.1
(88.0)
|
34.0
(93.2)
|
35.1
(95.2)
|
35.1
(95.2)
|
33.2
(91.8)
|
29.9
(85.8)
|
24.6
(76.3)
|
19.7
(67.5)
|
27.2
(81.0)
|
Mean daily minimum °C (°F)
|
14.5
(58.1)
|
15.4
(59.7)
|
18.1
(64.6)
|
22.4
(72.3)
|
27.2
(81.0)
|
30.0
(86.0)
|
31.4
(88.5)
|
31.5
(88.7)
|
29.5
(85.1)
|
26.4
(79.5)
|
21.6
(70.9)
|
16.8
(62.2)
|
23.7
(74.7)
|
Record low °C (°F)
|
?5
(23)
|
7.2
(45.0)
|
7.8
(46.0)
|
14.2
(57.6)
|
18.7
(65.7)
|
22.7
(72.9)
|
25.2
(77.4)
|
26.0
(78.8)
|
23.5
(74.3)
|
18.8
(65.8)
|
12.1
(53.8)
|
6.4
(43.5)
|
?5
(23)
|
Average
precipitation
mm (inches)
|
18.1
(0.71)
|
13.0
(0.51)
|
14.7
(0.58)
|
5.8
(0.23)
|
0.5
(0.02)
|
0.0
(0.0)
|
0.0
(0.0)
|
0.0
(0.0)
|
0.0
(0.0)
|
0.9
(0.04)
|
16.8
(0.66)
|
15.2
(0.60)
|
85.1
(3.35)
|
Average precipitation days
(≥ 1.0 mm)
|
2.5
|
1.9
|
2.5
|
1.3
|
0.3
|
0.0
|
0.0
|
0.0
|
0.0
|
0.2
|
1.6
|
2.3
|
12.6
|
Average
relative humidity
(%)
|
69.1
|
67.2
|
61.5
|
54.4
|
47.6
|
46.2
|
50.7
|
58.0
|
59.2
|
62.3
|
63.6
|
68.7
|
59.0
|
Average
dew point
°C (°F)
|
11.5
(52.7)
|
11.8
(53.2)
|
13.1
(55.6)
|
15.8
(60.4)
|
17.9
(64.2)
|
19.9
(67.8)
|
22.5
(72.5)
|
25.0
(77.0)
|
23.7
(74.7)
|
21.5
(70.7)
|
17.0
(62.6)
|
13.7
(56.7)
|
17.7
(63.9)
|
Mean monthly
sunshine hours
|
231.5
|
220.6
|
245.1
|
256.3
|
316.4
|
343.7
|
336.6
|
334.1
|
315.9
|
306.0
|
249.0
|
235.4
|
3,390.4
|
Source: NOAA
[4]
[5]
|
Area and boundaries
[
edit
]
Area:
total:780 km
2
country comparison to the world:
188
- land:780 km
2
- water: 0 km
2
Area comparative
Land boundaries:
0 km
Coastline:
161 km
Maritime claims:
- territorial sea: 12
nmi
(22.2 km; 13.8 mi)
- contiguous zone: 24 nmi (44.4 km; 27.6 mi)
- continental shelf: extending to boundaries to be determined
Elevation extremes:
Resources and land use
[
edit
]
Natural resources:
Land use:
- arable land: 2.11%
- permanent crops: 3.95%
- other: 93.95% (2012)
Irrigated land:
40.15 km
2
(2003)
Total renewable water resources:
0.12 m³ (2011)
Freshwater withdrawal (domestic/industrial/agricultural):
- total: 0.36 km
3
/yr (50%/6%/45%)
- per capita: 386 m³/yr (2003)
Environmental concerns
[
edit
]
Natural hazards:
periodic droughts; dust storms
Environment - current issues:
desertification
resulting from the degradation of limited arable land, periods of drought, and dust storms; coastal degradation (damage to coastlines, coral reefs, and sea vegetation) resulting from oil spills and other discharges from large tankers, oil refineries, and distribution stations; lack of freshwater resources (groundwater and seawater are the only sources for all water needs)
Environment - international agreements:
party to:
Biodiversity
, Climate Change-
Kyoto Protocol
,
Desertification
,
Hazardous Wastes
,
Law of the Sea
,
Ozone Layer
Protection,
Wetlands
See also
[
edit
]
Notes
[
edit
]
References
[
edit
]
Further reading
[
edit
]
26°00′N
50°33′E
/
26.000°N 50.550°E
/
26.000; 50.550