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The extensive network of rivers and streams of Sri Lanka drains a total of 103 distinct natural river basins. [2] Several waterfall habitats have been formed as a result of rivers and streams flowing through high and mid elevation areas. The ecoregion spreads over 15,500 km 2 in the wet zone of the southwestern part
There are two words meaning "river" in the Sinhala language, namely Ganga (ගඟ) and Oya (ඔය), of which the usage of both terms is arbitrary. At 335 km (208 mi), the Mahaweli River is the longest river on the island, its drainage basin covering more than one-fifth of the island. It is estimated that there are 103 rivers in Sri Lanka. [1]
More than 90% of Sri Lanka's surface lies on Precambrian strata, some of it dating back 2 billion years. [6] The granulite facies rocks of the Highland Series (gneisses, sillimanite-graphite gneisses, quartzite, marbles, and some charnockites) make up most of the island and the amphibolite facies gneisses, granites, and granitic gneisses of the Vijayan Series occur in the eastern and ...
Yodha Ela functions in a way of a moving reservoir because of its single banking aspect which is different from the present day double banking irrigation canals'. It feeds water in an area of 470 km 2 (180 sq mi) feeding 4,630 ha (11,400 acres) of paddy lands and 120 small tanks on its way from Kala Wewa to Tissa Wewa [7]
Topographic map of Sri Lanka. Sri Lanka, an island in South Asia shaped as a teardrop or a pear/mango, [167] lies on the Indian Plate, a major tectonic plate that was formerly part of the Indo-Australian Plate. [168] It is in the Indian Ocean southwest of the Bay of Bengal, between latitudes 5° and 10° N, and longitudes 79° and 82° E. [169]
The irrigation works in ancient Sri Lanka were some of the most complex irrigation systems of the ancient world. The earliest examples of irrigation works in Sri Lanka date from about 430 BCE, during the reign of King Pandukabhaya , and were under continuous development for the next thousand years.
On the right bank of the river, at the edge of the Mutugalla villu, ruins of an ancient cave monastery with inscriptions dating back to between 2nd and 7th century BC have been found. [3] Flood Plains National Park which declared in 1984 is in the upper flood plains of Mahaweli River and Somawathiya National Park declared in 1986 is situated in ...
The Newark Basin is one in a series of these failed rifts. It is a half-graben filled over time by characteristic red bed sediments, sediments eroded from the uplifted footwalls of the border faults that were deposited within the basin; they are red due to their abundance in oxidized iron oxide minerals.