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1UpTravel - Geography Info and Facts of Countries : . - Cambodia


Cambodia Geography and Facts

Location: Southeastern Asia, bordering the Gulf of Thailand, between Thailand, Vietnam, and Laos

Geographic coordinates: 13 00 N, 105 00 E

Map references: Southeast Asia

Area:
total: 181,040 sq km
land: 176,520 sq km
water: 4,520 sq km

Area - comparative: slightly smaller than Oklahoma

Land boundaries:
total: 2,572 km
border countries: Laos 541 km, Thailand 803 km, Vietnam 1,228 km

Coastline: 443 km

Maritime claims:
contiguous zone: 24 nm
continental shelf: 200 nm
exclusive economic zone: 200 nm
territorial sea: 12 nm

Climate: tropical; rainy, monsoon season (May to November); dry season (December to April); little seasonal temperature variation

Terrain: mostly low, flat plains; mountains in southwest and north

Elevation extremes:
lowest point: Gulf of Thailand 0 m
highest point: Phnum Aoral 1,810 m

Natural resources: timber, gemstones, some iron ore, manganese, phosphates, hydropower potential

Land use:
arable land: 13%
permanent crops: 0%
permanent pastures: 11%
forests and woodland: 66%
other: 10% (1993 est.)

Irrigated land: 920 sq km (1993 est.)

Natural hazards: monsoonal rains (June to November); flooding; occasional droughts

Environment - current issues: illegal logging activities throughout the country and strip mining for gems in the western region along the border with Thailand have resulted in habitat loss and declining biodiversity (in particular, destruction of mangrove swamps threatens natural fisheries); soil erosion; in rural areas, a majority of the population does not have access to potable water; toxic waste delivery from Taiwan sparked unrest in Kampong Saom (Sihanoukville) in December 1998

Environment - international agreements:
party to: Biodiversity, Climate Change, Desertification, Endangered Species, Marine Life Conservation, Ship Pollution, Tropical Timber 94, Wetlands
signed, but not ratified: Law of the Sea, Marine Dumping

Geography - note: a land of paddies and forests dominated by the Mekong River and Tonle Sap


Geography

The kingdom of Cambodia is bordered to the North by Thailand and Laos, to the East and the South by Vietnam, and to the South and West by the Gulf of Siam and Thailand. Cambodia compromises of 181,035 square kilometers.

The cities includes Phnom Penh, the capital has an approximately 1 million. Other major cities are Battambang, the second largest city, Siam Republic, Sihanouk vile, Kampong Cham, Kandal, Prey Veng, Takeo. Kampung Thom, Svay Rieng and Kampong Speu.


Climate

Situated in the tropical zone, Cambodia benefits from a great amount of sun year round. Each season has its own beauty and refreshing changes in weather. The average temperature is 27 degrees C.

The minimum temperature is about 16 degrees. There are two seasons: monsoon season and dry season. The humid, rainy season lasts from April to October due to southwestern monsoon. Temperature range from 25 degrees, with humidity up to 90 %.

The hottest month is April when the temperature can reach up to 38 degrees C. The cool, dry season lasts from November to March with temperatures ranging from 17 to 27 degrees, night and day. December to January is the coolest period.


Cambodia is a Southeast Asian country that borders on Thailand, Laos, and Vietnam. The country is sometimes known as Kampuchea.

Most Cambodians live on the fertile plains created by the floodwaters of the Mekong River, or near the Tonle Sap (Great Lake) and Tonle Sap River northwest of Phnom Penh, Cambodia's capital.

Following a five-year struggle, communist Khmer Rouge forces captured Phnom Penh in 1975 and ordered the evacuation of all cities and towns; over 1 million displaced people died from execution or enforced hardships.

A 1978 Vietnamese invasion drove the Khmer Rouge into the countryside and touched off 13 years of fighting. UN-sponsored elections in 1993 helped restore some semblance of normalcy, as did the rapid diminishment of the Khmer Rouge in the mid-1990s.

A coalition government, formed after national elections in 1998, brought renewed political stability and the surrender of remaining Khmer Rouge forces.


Cambodia

GEOGRAPHY

Size: Total area 181,040 square kilometers, about size of Missouri; country shares 800-kilometer border with Thailand on north and west, 541-kilometer border with Laos on northeast, 1,228- kilometer border with Vietnam on east and southeast; coastline along Gulf of Thailand about 443 kilometers.

Topography: Most salient topographical feature lacustrine plain formed by inundations of Tonle Sap (Great Lake), measuring about 2,590 square kilometers during dry season to about 24,605 square kilometers during rainy season. This densely populated plain devoted to wet rice cultivation constitutes heartland of Cambodia. Most (about 75 percent) of country lies at elevations of less than 100 meters above sea level, except for Cardamon Mountains (highest elevation 1,771 meters), their north-south extension to the east, Elephant Range (elevation range 500-1,000 meters) and steep escarpment of Dangrek Mountains (average elevation 500 meters) along northern border with Thailand.

Climate: Temperatures range from 10°C to 38°C. Tropical monsoons: southwest monsoon blowing inland in northeasterly direction brings moisture-laden winds from Gulf of Thailand/Indian Ocean from May to October with period of heaviest precipitation September-October; northeast monsoon blowing in southwesterly direction toward coast ushers in dry season, November to March, with period of least rainfall January-February.

Data as of December 1987


Cambodia

ENVIRONMENT

Cambodia covers 181,040 square kilometers in the southwestern part of the Indochina peninsula. It lies completely within the tropics; its southernmost points are only slightly more than 10° above the equator. Roughly square in shape, the country is bounded on the north by Thailand and by Laos, on the east and southeast by Vietnam, and on the west by the Gulf of Thailand and by Thailand. Much of the country's area consists of rolling plains. Dominant features are the large, almost centrally located, Tonle Sap (Great Lake) and the Mekong River, which traverses the country from north to south.

The climate is monsoonal and has marked wet and dry seasons of relatively equal length. Both temperature and humidity generally are high throughout the year. Forest covers about two-thirds of the country, but it has been somewhat degraded in the more readily accessible areas by burning (a method called slash-and-burn agriculture), and by shifting agriculture.

Data as of December 1987


Cambodia

Topography

Cambodia falls within several well-defined geographic regions. The largest part of the country--about 75 percent of the total-- consists of the Tonle Sap Basin and the Mekong Lowlands. To the southeast of this great basin is the Mekong Delta, which extends through Vietnam to the South China Sea. The basin and delta regions are rimmed with mountain ranges to the southwest (the Cardamom Mountains the Elephant Range) and to the north (Dangrek Mountains). Higher land to the northeast and to the east merges into the Central Highlands of southern Vietnam .

The Tonle Sap Basin-Mekong Lowlands region consists chiefly of plains with elevations generally of less than 100 meters. As the elevation increases, the terrain becomes more rolling and dissected.

The Cardamom Mountains in the southwest, oriented generally in a northwest-southeast direction, rise to more than 1,500 meters. The highest mountain in Cambodia--Phnom Aural, at 1,771 meters--is in the eastern part of this range. The Elephant Range, an extension running toward the south and the southeast from the Cardamom Mountains, rises to elevations of between 500 and 1,000 meters. These two ranges are bordered on the west by a narrow coastal plain that contains Kampong Saom Bay, which faces the Gulf of Thailand. This area was largely isolated until the opening of the port of Kampong Saom (formerly called Sihanoukville) and the construction of a road and railroad connecting Kampong Saom, Kampot, Takev, and Phnom Penh in the 1960s.

The Dangrek Mountains at the northern rim of the Tonle Sap Basin consist of a steep escarpment with an average elevation of about 500 meters, the highest points of which reach more than 700 meters. The escarpment faces southward and is the southern edge of the Korat Plateau in Thailand. The watershed along the escarpment marks the boundary between Thailand and Cambodia. The main road through a pass in the Dangrek Mountains at O Smach connects northwestern Cambodia with Thailand. Despite this road and those running through a few other passes, in general the escarpment impedes easy communication between the two countries. Between the western part of the Dangrek and the northern part of the Cardamom ranges, however, lies an extension of the Tonle Sap Basin that merges into lowlands in Thailand, which allows easy access from the border to Bangkok.

The Mekong Valley, which offers a communication route between Cambodia and Laos, separates the eastern end of the Dangrek Mountains and the northeastern highlands. To the southeast, the basin joins the Mekong Delta, which, extending into Vietnam, provides both water and land communications between the two countries.

Data as of December 1987


Cambodia

Climate

Cambodia's climate--like that of the rest of Southeast Asia--is dominated by the monsoons, which are known as tropical wet and dry because of the distinctly marked seasonal differences. The monsoonal airflows are caused by annual alternating high pressure and low pressure over the Central Asian landmass. In summer, moisture-laden air--the southwest monsoon--is drawn landward from the Indian Ocean. The flow is reversed during the winter, and the northeast monsoon sends back dry air. The southwest monsoon brings the rainy season from mid-May to mid-September or to early October, and the northeast monsoon flow of drier and cooler air lasts from early November to March. The southern third of the country has a two-month dry season; the northern two-thirds, a four-month one. Short transitional periods, which are marked by some difference in humidity but by little change in temperature, intervene between the alternating seasons. Temperatures are fairly uniform throughout the Tonle Sap Basin area, with only small variations from the average annual mean of around 25°C. The maximum mean is about 28°C; the minimum mean, about 22°C. Maximum temperatures of higher than 32°C, however, are common and, just before the start of the rainy season, they may rise to more than 38°C. Minimum temperatures rarely fall below 10°C. January is the coldest month, and April is the warmest. Typhoons--tropical cyclones--that often devastate coastal Vietnam rarely cause damage in Cambodia (see fig. 5).

The total annual rainfall average is between 100 and 150 centimeters, and the heaviest amounts fall in the southeast. Rainfall from April to September in the Tonle Sap Basin-Mekong Lowlands area averages 130 to 190 centimeters annually, but the amount varies considerably from year to year. Rainfall around the basin increases with elevation. It is heaviest in the mountains along the coast in the southwest, which receive from 250 to more than 500 centimeters of precipitation annually as the southwest monsoon reaches the coast. This area of greatest rainfall, however, drains mostly to the sea; only a small quantity goes into the rivers flowing into the basin. The relative humidity is high at night throughout the year; usually it exceeds 90 percent. During the daytime in the dry season, humidity averages about 50 percent or slightly lower, but it may remain about 60 percent in the rainy period.

Data as of December 1987


Cambodia

Drainage

Except for the smaller rivers in the southeast, most of the major rivers and river systems in Cambodia drain into the Tonle Sap or into the Mekong River. The Cardamom Mountains and Elephant Range form a separate drainage divide. To the east the rivers flow into the Tonle Sap, while on the west they flow into the Gulf of Thailand. Toward the southern end of the Elephant Mountains, however, because of the topography, some small rivers flow southward on the eastern side of the divide.

The Mekong River in Cambodia flows southward from the CambodiaLaos border to a point below Kracheh city, where it turns west for about 50 kilometers and then turns southwest to Phnom Penh. Extensive rapids run above Kracheh city. From Kampong Cham the gradient slopes very gently, and inundation of areas along the river occurs at flood stage--June through November--through breaks in the natural levees that have built up along its course. At Phnom Penh four major water courses meet at a point called the Chattomukh (Four Faces). The Mekong River flows in from the northeast and the Tonle Sab--a river emanating from the Tonle Sap--flows in from the northwest. They divide into two parallel channels, the Mekong River proper and the Basak River, and flow independently through the delta areas of Cambodia and Vietnam to the South China Sea.

The flow of water into the Tonle Sab is seasonal. In September or in October, the flow of the Mekong River, fed by monsoon rains, increases to a point where its outlets through the delta cannot handle the enormous volume of water. At this point, the water pushes northward up the Tonle Sab and empties into the Tonle Sap, thereby increasing the size of the lake from about 2,590 square kilometers to about 24,605 square kilometers at the height of the flooding (see fig. 6). After the Mekong's waters crest--when its downstream channels can handle the volume of water--the flow reverses, and water flows out of the engorged lake.

As the level of the Tonle Sap retreats, it deposits a new layer of sediment. The annual flooding, combined with poor drainage immediately around the lake, transforms the surrounding area into marshlands unusable for agricultural purposes during the dry season. The sediment deposited into the lake during the Mekong's flood stage appears to be greater than the quantity carried away later by the Tonle Sab River. Gradual silting of the lake would seem to be occurring; during low-water level, it is only about 1.5 meters deep, while at flood stage it is between 10 and 15 meters deep.

Data as of December 1987


Cambodia

Regional Divisions

Cambodia's boundaries in 1987 were for the most part based upon those recognized by France and by neighboring countries during the colonial period. The 800-kilometer boundary with Thailand, coincides with a natural feature, the watershed of the Dangrek Mountains, only in its northern sector. The 541-kilometer border with Laos and the 1,228-kilometer border with Vietnam result largely from French administrative decisions and do not follow major natural features. Border disputes have broken out in the past between Cambodia and Thailand as well as between, Cambodia and Vietnam.

Data as of December 1987



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