Singapore is an island south of
Malaysia surrounded by some smaller islands as can be seen in this satellite image.
The Singapore area comprises mainland and other islands. The mainland of Singapore measures 50 kilometres (31 mi) from east to west and 27 kilometres (17 mi) from north to south with 193 kilometres (120 mi) of coastline. These figures are based on 2.515 metres (8 ft 3.0 in) High Water Mark cadastral survey boundaries.
[1]
Physical geography[edit]
Singapore's main territory is a diamond-shaped island, although its territory includes surrounding smaller islands. The farthest outlying island is
Pedra Branca. Of Singapore's dozens of smaller islands,
Jurong Island,
Pulau Tekong,
Pulau Ubin and
Sentosa are the larger ones. Most of Singapore is no more than 15 meters above sea level.
Singapore has
reclaimed land with earth obtained from its own hills, the seabed, and neighbouring countries. As a result, Singapore's land area has grown from 581.5 km² in the 1960s to 723.2 km² today, and may grow by another 100 km² by 2033.
Climate of Singapore[edit]
Singapore is one-and-a-half degrees north of the equator, lying entirely between the
1st and
2nd parallels. Singapore's climate is classified as
tropical rainforest climate (
Köppen climate classification Af), with no true distinct seasons. Owing to its geographical location and maritime exposure, its climate is characterized by uniform temperature and pressure, high humidity and abundant rainfall. Therefore, it is almost always warm and wet. The average annual rainfall is around 2,340 mm (92.1 in). The highest 24-hour rainfall figures ever recorded in history were 512 mm (20.2 in) (1978), 467 mm (18.4 in) (1969) and 366 mm (14.4 in) (19 December 2006).
[2]
The temperature hovers around a
diurnal range of a minimum of 25 °C (77.0 °F) and a maximum of 37 °C (98.6 °F). April is the hottest month of the year in Singapore, followed by May. This is due to light winds and strong sunshine during those months.
[3] The highest recorded temperature is 36.7 °C (98.1 °F) on 13 April 2016. The lowest recorded temperature was 19.4 °C (66.9 °F) in January 1934.
[4] Temperature often goes above 33.2 °C (91.8 °F) and can reach 35 °C (95 °F) at times.
Relative humidity has a diurnal range in the high 90s in the early morning to around 60% in the mid-afternoon, but does go below 50% at times. In May 2009, the average relative humidity was 81%, an increase over the figure of 77.1% in May 2008.
[5] During prolonged heavy rain, relative humidity often reaches 100%. Generally, there is much more rainfall on the western side of the island than on the eastern portion of Singapore, owing to a
rain shadow effect.
Thus, the eastern side of Singapore is much drier and slightly hotter than western Singapore. This can cause slight weather disparities from one side of the island to the other. This is significant to note because even a small hill such as
Bukit Timah Hill can cause this phenomenon. Despite Singapore's small size, there may be sunshine on one side while there is rain on the other.
Further contrasts that prevent true all-year uniformity are the
monsoon seasons which happen twice each year. The first one is the Northeast Monsoon which occurs from mid-November to early March. The second is the Southwest Monsoon season which occurs from June to September. Periods between monsoon seasons receive less rain and wind. During the Northeast Monsoon, northeast winds
prevail, sometimes reaching 20 km/h (12 mph). There are cloudy conditions in December and January with frequent afternoon showers.
Spells of widespread moderate to heavy rain occur lasting from 1 to 3 days at a stretch. It is relatively dry in February till early March although rainfall still exceeds 120mm. It is also generally windy with wind speeds sometimes reaching 30 to 50 km/h (19 to 31 mph) in the months of January and February. During the Southwest Monsoon season, southeast winds prevail. Isolated to scattered showers occur in the late morning and early afternoon. Early morning "Sumatra"
squall lines are common.
| [hide]Climate data for Singapore |
|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|
| Record high °C (°F) | 34.3
(93.7) | 35.2
(95.4) | 36.0
(96.8) | 35.8
(96.4) | 35.4
(95.7) | 35.0
(95) | 34.0
(93.2) | 34.2
(93.6) | 34.3
(93.7) | 34.6
(94.3) | 34.2
(93.6) | 33.8
(92.8) | 36.0
(96.8) |
|---|
| Average high °C (°F) | 30.1
(86.2) | 31.2
(88.2) | 31.6
(88.9) | 31.7
(89.1) | 31.6
(88.9) | 31.3
(88.3) | 30.9
(87.6) | 30.9
(87.6) | 30.9
(87.6) | 31.1
(88) | 30.6
(87.1) | 30.0
(86) | 31.0
(87.8) |
|---|
| Daily mean °C (°F) | 26.0
(78.8) | 26.5
(79.7) | 27.0
(80.6) | 27.4
(81.3) | 27.7
(81.9) | 27.7
(81.9) | 27.4
(81.3) | 27.3
(81.1) | 27.2
(81) | 27.0
(80.6) | 26.5
(79.7) | 26.0
(78.8) | 26.98
(80.56) |
|---|
| Average low °C (°F) | 23.3
(73.9) | 23.6
(74.5) | 23.9
(75) | 24.4
(75.9) | 24.8
(76.6) | 24.8
(76.6) | 24.6
(76.3) | 24.5
(76.1) | 24.2
(75.6) | 24.1
(75.4) | 23.7
(74.7) | 23.5
(74.3) | 24.1
(75.4) |
|---|
| Record low °C (°F) | 19.4
(66.9) | 19.7
(67.5) | 20.2
(68.4) | 20.7
(69.3) | 21.2
(70.2) | 20.8
(69.4) | 19.7
(67.5) | 20.2
(68.4) | 20.7
(69.3) | 20.6
(69.1) | 21.1
(70) | 20.6
(69.1) | 19.4
(66.9) |
|---|
| Average rainfall mm (inches) | 243.2
(9.575) | 159.9
(6.295) | 185.7
(7.311) | 178.9
(7.043) | 171.3
(6.744) | 162.1
(6.382) | 158.7
(6.248) | 175.4
(6.906) | 169.2
(6.661) | 193.8
(7.63) | 256.9
(10.114) | 287.4
(11.315) | 2,342.5
(92.224) |
|---|
| Average rainy days | 15 | 11 | 14 | 15 | 15 | 13 | 13 | 14 | 14 | 16 | 19 | 19 | 178 |
|---|
| Average relative humidity (%) | 84.7 | 82.8 | 83.8 | 84.8 | 84.4 | 83.0 | 82.8 | 83.0 | 83.4 | 84.1 | 86.4 | 86.9 | 84.2 |
|---|
| Mean monthly sunshine hours | 172.4 | 183.2 | 192.7 | 173.6 | 179.8 | 177.7 | 187.9 | 180.6 | 156.2 | 155.2 | 129.6 | 133.5 | 2,022.4 |
|---|
| Source #1: National Environment Agency (temp. 1929–1941 and 1948–2011, rainfall 1869–2011, humidity 1929–1941 and 1948–2011, rain days 1891–2011)[6] |
| Source #2: NOAA (sun only, 1961–1990)[7] |
| Singapore |
|---|
| Climate chart (explanation) |
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| J | F | M | A | M | J | J | A | S | O | N | D |
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| Average max. and min. temperatures in °C |
| Precipitation totals in mm |
| Source: NEA[4] |
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| [show]Imperial conversion |
|---|
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Seismic activity[edit]
Singapore is relatively safe from seismic activity in the region, as the nearest major active faults (Sumatran fault and Sunda megathrust fault) are hundreds of kilometres away in Indonesia. However, the population and buildings are prone to being only very slightly affected by any activity as
tremors, which is not uncommon, but generally does not do any harm and is limited to small amounts of swaying or vibration of objects.
In late 2004, several parts of Asia and Africa were struck by the
2004 Indian Ocean earthquake and the resulting
tsunami. Singapore was fortunate as it was protected by the
Sumatra landmass, which bore the brunt of the tsunami; the effect on Singapore was limited to tremors felt in some of the common high-rise buildings there.
Geology[edit]
Political and human geography[edit]
Singapore's urban geography is often characterised by extensive use of HDB flats, which the majority of citizens reside in, and the maintenance of parks.
When Singapore was first colonized by the British, the
city of Singapore was situated on the southern coast, around the mouth of the
Singapore River. This area remains the
Downtown Core of Singapore. The rest of the island was
farmland and primary
rainforest. However, since the 1960s the government has constructed many new towns in other areas, so that today the island is nearly entirely built-up and
urbanised, with only a few exceptions, such as the district of
Lim Chu Kang or reclaimed land in the process of being developed.
The
Urban Redevelopment Authority is the government agency responsible for the
urban planning of Singapore, which seeks to implement efficient land use, minimise pollution while maintaining convenient transport, which are Singapore's largest concerns because of its situation as a city-state. A
Development Guide Plan has been released in the process.
In order to reduce traffic congestion,
Electronic road pricing (ERP) has been enacted around entrances into the Central Area. The other parts of Singapore are less dense and busy, and are often filled with housing estates such as from the
Housing and Development Board(HDB) or
condominiums, and commercial districts are less concentrated. However, to reduce strain on the Central Area, several regional centres have been developed, each containing a concentrated commercial district.
Light industry tends to be distributed around the island as industrial estates and located in flats, similar to the HDB, and only allow
tenantswhich produce close to nil pollution, whereas heavy industry tends to be located around
Jurong and
Jurong Island. A list of such estates can be found
here.
There are two connections to the state of
Johor, Malaysia. In the north there is a
causeway for both rail and road traffic, which connects to the city of
Johor Bahru. In the west there is a road bridge (
Tuas Second Link), which connects to Johor, for road traffic only. The connections are an important economic link to Malaysia, which can be seen as a hinterland.
The causeway (1,038m in length) was designed by Coode, Fizmaurice, Wilson and Mitchell of Westminster and constructed by Topham, Jones & Railton Ltd of London. It was started in 1909 as a railway link by Johor State Railway to connect Johor Bahru to Singapore, then the administrative headquarters of British interests in Southeast Asia. Construction of the road section started in 1919 and completed in 1923.
The causeway has caused ecological problems, most notably accumulation of silt in the Johore Strait. This has led to disagreements with Malaysia. Singapore has rejected Malaysia's proposal to replace the causeway with a bridge, and Malaysia has since proposed the idea of what became known as "the crooked half-bridge", descending halfway to link up with the low-level causeway.
Since Singapore lacks natural freshwater rivers and lakes, the primary source of domestic water is rainfall. Demand for fresh water is approximately twice that supplied by rainfall, so Singapore imports much of its fresh water from Malaysia and Indonesia. To lessen its reliance on imports, Singapore has built reservoirs to collect rainwater and recycled water facilities. In addition, Singapore has built a desalination plant on the western coast of Tuas. This plant is expected to at least meet half of Singapore's water demands. Recent plans to produce
NEWater-recycled water from treatment by filtration via
reverse osmosis have been very successful as the government has opened up three plants around the island to help meet the demand.
There are more than 300 parks and 4 nature reserves in Singapore. There are also many trees planted, and almost fifty per cent of the country is covered by greenery. Because of this, Singapore is also commonly known as the 'Garden City'.
[8]
At a glance[edit]
Singapore claims an
exclusive fishing zone within and beyond its territorial sea, as defined in treaties and practice. Its
territorial sea:extends 3 nautical miles (5.6 km) beyond its coastline.
[citation needed]
Climate: tropical; hot, humid, rainy; monsoons are expected from mid-November till early March and from mid-June till early September, heavy downpours are expected to be frequent during this period ; thunderstorms occur on 51% of all days (69% of days in April)
Terrain: lowland; gently undulating central plateau contains water catchment area and nature preserve
Natural resources: fish, deepwater ports
Land use:
arable land: 2%
permanent crops: 6%
permanent pastures: 0%
permafrost: 0%
forests and woodland: 5%
other: 87% (1993 est.)
Irrigated land: NA
Natural hazards: NA
Geography – note: focal point for Southeast Asian sea routes
