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1UpTravel - Weather Forecast & Weather Reports of Cities Country-wise. - Weather Forecast for Cities of Sri Lanka

Weather Forecast & Reports for Cities of Sri Lanka

 Katunayake, Sri Lanka
 Anuradhapura, Sri Lanka
 Batticaloa, Sri Lanka
 Ratmalana, Sri Lanka
 Trincomalee, Sri Lanka

Location: Southern Asia, island in the Indian Ocean, south of India

Geographic coordinates: 7 00 N, 81 00 E

Map references: Asia

Area:
total: 65,610 sq km
land: 64,740 sq km
water: 870 sq km

Area - comparative: slightly larger than West Virginia

Land boundaries: 0 km

Coastline: 1,340 km

Maritime claims:
contiguous zone: 24 nm
continental shelf: 200 nm or to the edge of the continental margin
exclusive economic zone: 200 nm
territorial sea: 12 nm

Climate: tropical monsoon; northeast monsoon (December to March); southwest monsoon (June to October)

Terrain: mostly low, flat to rolling plain; mountains in south-central interior

Elevation extremes:
lowest point: Indian Ocean 0 m
highest point: Pidurutalagala 2,524 m

Natural resources: limestone, graphite, mineral sands, gems, phosphates, clay, hydropower

Land use:
arable land: 14%
permanent crops: 15%
permanent pastures: 7%
forests and woodland: 32%
other: 32% (1993 est.)

Irrigated land: 5,500 sq km (1993 est.)

Natural hazards: occasional cyclones and tornadoes

Environment - current issues: deforestation; soil erosion; wildlife populations threatened by poaching and urbanization; coastal degradation from mining activities and increased pollution; freshwater resources being polluted by industrial wastes and sewage runoff; waste disposal; air pollution in Colombo

Environment - international agreements:
party to: Biodiversity, Climate Change, Desertification, Endangered Species, Environmental Modification, Hazardous Wastes, Law of the Sea, Nuclear Test Ban, Ozone Layer Protection, Ship Pollution, Wetlands
signed, but not ratified: Marine Life Conservation

Geography - note: strategic location near major Indian Ocean sea lanes


Geography
Sri Lanka, formerly Ceylon. Lies between a chain of tiny islands known as Adam's Bridge. Sri Lanka is somewhat pear-shaped. The total area of Sri Lanka is 65,610 sq km (25,332 sq mi). Colombo is the commercial capital and the largest city.

Sri Lanka has an irregular surface with low-lying coastal plains running inland from the northern and eastern shores. The central and southern areas slope into hills and mountains. The highest peak is Pidurutalagala (2524m/8281ft).


Climate
Tropical climate. Upland areas are cooler and more temperate and coastal areas are cooled by sea breezes.

There are two monsoons, which occur May to July and December to January.

The average annual temperature is about 32° C (about 90° F) in the lowlands and about 21° C (about 70° F) in the higher mountainous regions.


Sri Lanka is a beautiful island country in the Indian Ocean. It lies about 32 kilometres off the southeast coast of India. Its official name is the Democratic Socialist Republic of Sri Lanka.

The country was formerly called Ceylon.

Occupied by the Portuguese in the 16th century and the Dutch in the 17th century, the island was ceded to the British in 1802. As Ceylon it became independent in 1948; its name was changed in 1972.

Tensions between the Sinhalese majority and Tamil separatists erupted in violence in the mid-1980s. Tens of thousands have died in an ethnic war that continues to fester.


Sri Lanka

GEOGRAPHY

Size: Pear-shaped island 29 kilometers off southeastern coast of India; total area 65,610 square kilometers, of which land area 64,740 square kilometers.

Topography: Irregular, dissected, central massif dominates south; highest elevation Pidurutalagala (2,524 meters) but better-known mountain Adam's Peak (2,243 meters), destination of interfaith pilgrimages. Coastal belt (less than 100 meters elevation) succeeded by rolling plains (100-500 meters elevation) of varying width extends from seashore to foothills of central massif. In northern half of island, topography falls away to rolling plain, relieved only by isolated ridges. Rivers extend radially from central massif to coast; longest Mahaweli Ganga (860 kilometers), which flows in northeasterly direction. About 40 percent of island forested. Coastline regular but indented by numerous lagoons and marked by sandy beaches.

Climate: Equatorial and tropical influenced by elevation above sea level, but marked by only slight diurnal and seasonal variations; temperature in Colombo (at sea level) varies from 25°C to 28°C, and in central massif (site of highest elevations) 14°C to 16°C. Subject to southwest monsoon from mid May to October and northeast monsoon December to March. Rainfall uneven; divides country climatically into wet zone comprising southwestern quarter and dry zone on remainder of island. Annual precipitation in wet zone averages 250 centimeters; in dry zone precipitation varies from 120 to 190 centimeters.

Data as of October 1988


Sri Lanka

THE PHYSICAL ENVIRONMENT

Geology

More than 90 percent of Sri Lanka's surface lies on Precambrian strata, some of it dating back 2 billion years. The metamorphic rock surface was created by the transformation of ancient sediments under intense heat and pressure during mountain-building processes. The theory of plate tectonics suggests that these rocks and related rocks forming most of south India were part of a single southern landmass called Gondwanaland. Beginning about 200 million years ago, forces within the earth's mantle began to separate the lands of the Southern Hemisphere, and a crustal plate supporting both India and Sri Lanka moved toward the northeast. About 45 million years ago, the Indian plate collided with the Asian landmass, raising the Himalayas in northern India, and continuing to advance slowly to the present time. Sri Lanka experiences few earthquakes or major volcanic events because it rides on the center of the plate.

The island contains relatively limited strata of sedimentation surrounding its ancient hills. Aside from recent deposits along river valleys, only two small fragments of Jurassic (140 to 190 million years ago) sediment occur in Puttalam District, while a more extensive belt of Miocene (5 to 20 million years ago) limestone is found along the northwest coast, overlain in many areas by Pleistocene (1 million years ago) deposits (see fig. 1). The northwest coast is part of the deep Cauvery (Kaveri) River Basin of southeast India, which has been collecting sediments from the highlands of India and Sri Lanka since the breakup of Gondwanaland.

Data as of October 1988


Sri Lanka

Topography

Extensive faulting and erosion over time have produced a wide range of topographic features, making Sri Lanka one of the most scenic places in the world. Three zones are distinguishable by elevation: the Central Highlands, the plains, and the coastal belt .

The south-central part of Sri Lanka--the rugged Central Highlands--is the heart of the country. The core of this area is a high plateau, running north-south for approximately sixty-five kilometers. This area includes some of Sri Lanka's highest mountains. (Pidurutalagala is the highest at 2,524 meters.) At the plateau's southern end, mountain ranges stretch 50 kilometers to the west toward Adams Peak (2,243 meters) and 50 kilometers to the east toward Namunakuli (2,036 meters). Flanking the high central ridges are two lower plateaus. On the west is the Hatton Plateau, a deeply dissected series of ridges sloping downward toward the north. On the east, the Uva Basin consists of rolling hills covered with grasses, traversed by some deep valleys and gorges. To the north, separated from the main body of mountains and plateaus by broad valleys, lies the Knuckles Massif: steep escarpments, deep gorges, and peaks rising to more than 1,800 meters. South of Adams Peak lie the parallel ridges of the Rakwana Hills, with several peaks over 1,400 meters. The land descends from the Central Highlands to a series of escarpments and ledges at 400 to 500 meters above sea level before sloping down toward the coastal plains.

Most of the island's surface consists of plains between 30 and 200 meters above sea level. In the southwest, ridges and valleys rise gradually to merge with the Central Highlands, giving a dissected appearance to the plain. Extensive erosion in this area has worn down the ridges and deposited rich soil for agriculture downstream. In the southeast, a red, lateritic soil covers relatively level ground that is studded with bare, monolithic hills. The transition from the plain to the Central Highlands is abrupt in the southeast, and the mountains appear to rise up like a wall. In the east and the north, the plain is flat, dissected by long, narrow ridges of granite running from the Central Highlands.

A coastal belt about thirty meters above sea level surrounds the island. Much of the coast consists of scenic sandy beaches indented by coastal lagoons. In the Jaffna Peninsula, limestone beds are exposed to the waves as low-lying cliffs in a few places. In the northeast and the southwest, where the coast cuts across the stratification of the crystalline rocks, rocky cliffs, bays, and offshore islands can be found; these conditions have created one of the world's best natural harbors at Trincomalee on the northeast coast, and a smaller rock harbor at Galle on the southwestern coast.

Sri Lanka's rivers rise in the Central Highlands and flow in a radial pattern toward the sea. Most of these rivers are short. There are sixteen principal rivers longer than 100 kilometers in length, with twelve of them carrying about 75 percent of the mean river discharge in the entire country. The longest rivers are the Mahaweli Ganga (335 kilometers) and the Aruvi Aru (170 kilometers). In the highlands, river courses are frequently broken by discontinuities in the terrain, and where they encounter escarpments, numerous waterfalls and rapids have eroded a passage. Once they reach the plain, the rivers slow down and the waters meander across flood plains and deltas. The upper reaches of the rivers are wild and usually unnavigable, and the lower reaches are prone to seasonal flooding. Human intervention has altered the flows of some rivers in order to create hydroelectric, irrigation, and transportation projects. In the north, east, and southeast, the rivers feed numerous artificial lakes or reservoirs (tanks) that store water during the dry season. During the 1970s and 1980s, large-scale projects dammed the Mahaweli Ganga and neighboring streams to create large lakes along their courses . Several hundred kilometers of canals, most of which were built by the Dutch in the eighteenth century, link inland waterways in the southwestern part of Sri Lanka.

Data as of October 1988


Sri Lanka

Climate

Sri Lanka's position between 5 and 10 north latitude endows the country with a warm climate, moderated by ocean winds and considerable moisture. The mean temperature ranges from a low of 15.8° C in Nuwara Eliya in the Central Highlands (where frost may occur for several days in the winter) to a high of 29° C in Trincomalee on the northeast coast (where temperatures may reach 37° C). The average yearly temperature for the country as a whole ranges from 26° C to 28° C. Day and night temperatures may vary by 4 to 7 . January is the coolest month, causing people, especially those in the highlands, to wear coats and sweaters. May, the hottest period, precedes the summer monsoon rains.

The rainfall pattern is influenced by the monsoon winds of the Indian Ocean and Bay of Bengal and is marked by four seasons. The first is from mid-May to October, when winds originate in the southwest, bringing moisture from the Indian Ocean. When these winds encounter the slopes of the Central Highlands, they unload heavy rains on the mountain slopes and the southwestern sector of the island. Some of the windward slopes receive up to 250 centimeters of rain per month, but the leeward slopes in the east and northeast receive little rain. The second season occurs in October and November, the intermonsoonal months. During this season, periodic squalls occur and sometimes tropical cyclones bring overcast skies and rains to the southwest, northeast, and eastern parts of the island. During the third season, December to March, monsoon winds come from the northeast, bringing moisture from the Bay of Bengal. The northeastern slopes of the mountains may be inundated with up to 125 centimeters of rain during these months. Another intermonsoonal period occurs from March until mid-May, with light, variable winds and evening thundershowers.

Humidity is typically higher in the southwest and mountainous areas and depends on the seasonal patterns of rainfall. At Colombo, for example, daytime humidity stays above 70 percent all year, rising to almost 90 percent during the monsoon season in June. Anuradhapura experiences a daytime low of 60 percent during the intermonsoonal month of March, but a high of 79 percent during the November and December rains. In the highlands, Kandy's daytime humidity usually ranges between 70 and 79 percent.

Data as of October 1988


Sri Lanka

Ecological Zones

The pattern of life in Sri Lanka depends directly on the availability of rainwater. The mountains and the southwestern part of the country, known as the "wet zone," receive ample rainfall (an annual average of 250 centimeters). Most of the southeast, east, and northern parts of the country comprise the "dry zone, which receives between 120 and 190 centimeters of rain annually. Much of the rain in these areas falls from October to January; during the rest of the year there is very little precipitation, and all living creatures must conserve precious moisture. The arid northwest and southeast coasts receive the least amount of rain--60 to 120 centimeters per year-- concentrated within the short period of the winter monsoon .

The natural vegetation of the dry zone is adapted to the annual change from flood to drought. The typical ground cover is scrub forest, interspersed with tough bushes and cactuses in the driest areas. Plants grow very fast from November to February when rainfall is heavy, but stop growing during the hot season from March to August. Various adaptations to the dry conditions have developed. To conserve water, trees have thick bark; most have tiny leaves, and some drop their leaves during this season. Also, the topmost branches of the tallest trees often interlace, forming a canopy against the hot sun and a barrier to the dry wind. When water is absent, the plains of the dry zone are dominated by browns and grays. When water becomes available, either during the wet season or through proximity to rivers and lakes, the vegetation explodes into shades of green with a wide variety of beautiful flowers. Varieties of flowering acacias are well adapted to the arid conditions and flourish on the Jaffna Peninsula. Among the trees of the dry-land forests are some valuable species, such as satinwood, ebony, ironwood, and mahogany.

In the wet zone, the dominant vegetation of the lowlands is a tropical evergreen forest, with tall trees, broad foliage, and a dense undergrowth of vines and creepers. Subtropical evergreen forests resembling those of temperate climates flourish in the higher altitudes. Montane vegetation at the highest altitudes tends to be stunted and windswept.

Forests at one time covered nearly the entire island, but by the late twentieth century lands classified as forests and forest reserves covered only one-fifth of the land. The southwestern interior contains the only large remnants of the original forests of the wet zone. The government has attempted to preserve sanctuaries for natural vegetation and animal life, however. Ruhunu National Park in the southeast protects herds of elephant, deer, and peacocks, and Wilpattu National Park in the northwest preserves the habitats of many water birds, such as storks, pelicans, ibis, and spoonbills. During the Mahaweli Garga Program of the 1970s and 1980s in northern Sri Lanka, the government set aside four areas of land totalling 190,000 hectares as national parks.

Data as of October 1988


Sri Lanka

Land Use and Settlement Patterns

The dominant pattern of human settlement during the last 2,500 years has consisted of village farming communities. Even in the 1980s, the majority of people lived in small villages and worked at agricultural pursuits. Traditional farming techniques and life-styles revolve around two types of farming--"wet" and "dry"--depending upon the availability of water .

The typical settlement pattern in the rice-growing areas is a compact group of houses or neighborhood surrounding one or several religious centers that serve as the focus for communal activities. Sometimes the houses may be situated along a major road and include a few shops, or the village may include several outlying hamlets. The life-sustaining rice fields begin where the houses end and stretch into the distance. Some irrigated fields may include other cash crops, such as sugarcane, or groves of coconut trees. Palmyra trees grow on the borders of fields or along roads and paths. Individual houses also may have vegetable gardens in their compounds. During the rainy seasons and thereafter, when the fields are covered by growing crops, the village environment is intensely verdant.

The nature of agricultural pursuits in Sri Lanka has changed over the centuries and has usually depended upon the availability of arable land and water resources. In earlier times, when villagers had access to plentiful forests that separated settlements from each other, slash-and-burn agriculture was a standard technique. As expanding population and commercial pressures reduced the amount of available forestland, however, slash-and-burn cultivation steadily declined in favor of permanent cultivation by private owners. Until the thirteenth century, the village farming communities were mainly on the northern plains around Anuradhapura and then Polonnaruwa, but they later shifted to the southwest (see Decline of the Sinhalese Kingdom, 1200-1500 , ch. 1). In the 1980s, wide expanses of the northern and eastern plains were sparsely populated, with scattered villages each huddled around an artificial lake. The Jaffna Peninsula, although a dry area, is densely populated and intensively cultivated. The southwest contains most of the people, and villages are densely clustered with little unused land . In the Central Highlands around Kandy, villagers faced with limited flat land have developed intricately terraced hillsides where they grow rice. In the 1970s and 1980s, the wet cultivation area was expanding rapidly, as the government implemented large-scale irrigation projects to restore the dry zone to agricultural productivity. In the 1980s, the area drained by the Mahaweli Ganga changed from a sparsely inhabited region to a wet rice area similar to the southwest. Through such projects, the government of Sri Lanka has planned to recreate in the dry zone the lush, irrigated landscape associated with the ancient Sinhalese civilization.

Beginning in the sixteenth century and culminating during the British rule of the nineteenth and twentieth centuries, the plantation economy came to dominate large sections of the highlands. Plantation farming resulted in a drastic reduction in the natural forest cover and the substitution of domesticated crops, such as rubber, tea, or cinnamon. It also brought about a changed life-style, as the last hunting-and-gathering societies retreated into smaller areas and laborers moved into the highlands to work on plantations. Through the late twentieth century, workers on large plantations lived in villages of small houses or in "line rooms" containing ten to twelve units. The numerous plantations of small landholders frequently included attached hamlets of workers in addition to the independent houses of the plantation owners.

The coastal belt surrounding the island contains a different settlement pattern that has evolved from older fishing villages. Separate fishing settlements expanded laterally along the coast, linked by a coastal highway and a railway. The mobility of the coastal population during colonial times and after independence led to an increase in the size and number of villages, as well as to the development of growing urban centers with outside contacts. In the 1980s, it was possible to drive for many kilometers along the southwest coast without finding a break in the string of villages and bazaar centers merging into each other and into towns.

Data as of October 1988



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