Rivers
The rich network of rivers in Sri Lanka make the island an oasis at any time of year, naturally watering the paradise garden with its splendid heritage. The highest concentration of rivers and lakes is found in the south-west of the country, making it possibly the most fertile area in Sri Lanka.
Floder
Sri Lankas floder har sitt ursprung i det centrala höglandet. Därifrån mynnar de ut på slätterna och ut i havet. Floderna är vanligtvis ofarliga i sina högre delar, där de flyter snabbt och turbulent genom starkt eroderade passager till slätterna nedanför. Många floder rinner ner över branta klippor och bildar spektakulära vattenfall. I sina nedre lopp slingrar sig floderna långsamt genom flodslätter och deltan.
Sri Lankas längsta flod, Mahaweli, korsar en sträcka på cirka 330 km. Den flyter nordost över det centrala höglandet och mynnar ut i Bengaliska viken nära hamnen i Trincomalee på östkusten. Landets näst längsta flod är Aravi Aru, som korsar cirka 220 km nordväst, från det centrala höglandet till Mannarbukten.
Sri Lanka har inga naturliga sjöar. Dammar i Mahaweli och andra floder har skapat stora reservoarer. Dessutom finns en serie små reservoarer, kallade tankar, utspridda på de norra centrala slätterna, där de lagrar vatten under torrperioden. Några av tankarna byggdes för så många som 2 000 år sedan.
Stora delar av Sri Lanka är torra och har endast ett fåtal permanenta floder. Den sydvästra regionens "våta zon" kännetecknas dock av många floder som har sitt ursprung i de höga bergen i den centrala delen av ön. Dessa mångsidiga flodbassänger hyser endemiska populationer av vattenväxter, musslor och fiskar.
Sri Lankas kända sötvattensarter inkluderar 90 fiskar (med tjugosex endemiska arter) och 21 krabbor, men pågående studier tyder på att antalet obeskrivna arter potentiellt är ganska stort.
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Mahaweli RiverExplore the majestic Mahaweli River, Sri Lanka’s longest river, offering serene boat rides and opportunities for birdwatching and nature adventures along its winding course through scenic valleys.
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Kelani RiverThe Kelani River is a 145-kilometre-long (90 mi) river in Sri Lanka. It flows through or borders the Sri Lankan districts of Nuwara Eliya, Ratnapura, Kegalle, Gampaha and Colombo.
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Kalu GangaKalu Ganga is a river in Sri Lanka. Measuring 129 km (80 mi) in length. The mountainous forests in the Province and the Sinharaja Forest Reserve are the main sources of water for the river.
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Walawe RiverThe southern region of Sri Lanka is exalted by a bushel of enthralling and glorified rivers and the Walawe River is one of them. Gently flowing through the Udawalawe National Park, the Walawe River provides water for a multitude of species of mesmerising fauna.
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Deduru OyaThe Deduru Oya Dam is an embankment dam built across the Deduru River in Kurunegala District of Sri Lanka. Built in 2014, the primary purpose of the dam is to retain approximately a billion cubic metres of water for irrigation purposes, which would otherwise flow out to sea.
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Malwathu OyaThe Malvathu River long river in Sri Lanka, connecting the city of Anuradhapura, which was the capital of the country for over 15 centuries, to the coast of Mannar. It currently ranks as the second longest river in the country, with a great historic significance.
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Kala OyaIt was around these ancient tank (water storage reservoir) irrigation systems that the economy and human settlements of early Sri Lankan society were organised into a “hydraulic civilization”.
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Gal OyaDiscover Gal Oya, a tranquil sanctuary in Sri Lanka, known for its lush landscapes, rich wildlife, and serene boat safaris, offering a peaceful retreat surrounded by nature and wildlife.
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Gin GangaThe Gin Ganga, is a 115.9 km (72 mi) long river situated in Galle District of Sri Lanka. The river's headwaters are located near Deniyaya, bordering the Sinharaja Forest Reserve.
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Kirindi OyaExperience the serene beauty of Kirindi Oya, a tranquil river in Sri Lanka. Enjoy scenic boat rides, lush landscapes, and opportunities for birdwatching, offering a peaceful escape into nature.
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Kumbukkan OyaThe Kumbukkan Oya is the twelfth-longest river of Sri Lanka. It is approximately 116 km (72 mi) long. Its catchment area receives approximately 2,115 million cubic metres of rain per year.
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Maduru OyaThe Maduru Oya is a major stream in the North Central Province of Sri Lanka. It is approximately 135 km (84 mi) in length. approximately 3,060 million cubic metres of rain per year
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Manik RiverExplore the peaceful Manik River, surrounded by lush greenery and rich wildlife. Enjoy scenic boat rides and nature walks, offering a serene and refreshing experience.
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Yan OyaThe Yan Oya, 142 km long and receives 2,371 million cubic meters of rainfall annually, with 17% flowing to the sea. Its catchment area covers 1,520 square kilometers.