Maha Oya

இலங்கையில் மால்வத்து நதி நீண்ட நதியாகும், இது 15 நூற்றாண்டுகளுக்கும் மேலாக நாட்டின் தலைநகராக இருந்த அனுராதபுரம் நகரத்தை மன்னார் கடற்கரையுடன் இணைக்கிறது. இது தற்போது நாட்டின் இரண்டாவது நீளமான நதியாக உள்ளது, இது ஒரு பெரிய வரலாற்று முக்கியத்துவம் வாய்ந்தது.

களனி ஆறு இலங்கையில் 145 கிலோமீட்டர் நீளம் (90 மைல்) கொண்ட ஒரு நதியாகும். நாட்டின் நான்காவது நீளமான நதியாக இது தரவரிசைப்படுத்தப்பட்டுள்ளது, இது ஸ்ரீ பாத மலைத்தொடரிலிருந்து கொழும்பு வரை நீண்டுள்ளது. இது இலங்கையின் நுவரெலியா, ரத்னபுரா, கேகாலை, கம்பஹா மற்றும் கொழும்பு மாவட்டங்கள் வழியாகவோ அல்லது எல்லையாகவோ பாய்கிறது.

The Yan Oya is the fifth-longest river of Sri Lanka. It measures approximately 142 km (88 mi) in length. Its catchment area receives approximately 2,371 million cubic metres of rain per year, and approximately 17 percent of the water reaches the sea. It has a catchment area of 1,520 square kilometres.

The 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.

Kalu Ganga is a river in Sri Lanka. Measuring 129 km (80 mi) in length, the river originates from Sri Padhaya and reach the sea at Kalutara. The Black River flows through the Ratnapura and the Kalutara District and pass the city Ratnapura. The mountainous forests in the Central Province and the Sinharaja Forest Reserve are the main sources of water for the river.

The Maha Oya is a major stream in the Sabaragamuwa Province of Sri Lanka. It measures approximately 134 km (83 mi) in length. It runs across four provinces and five districts. Maha Oya has 14 Water supply networks to serve the need of water and more than 1 million people live by the river.

The Gin Ganga, is a 115.9 km (72 mi) long river situated in Galle District of Sri Lanka. The river's headwaters are located in the Gongala Mountain range, near Deniyaya, bordering the Sinharaja Forest Reserve.

It 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”.

The 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.

The Maduru Oya is a major stream in the North Central Province of Sri Lanka. It is approximately 135 km (84 mi) in length. Its catchment area receives approximately 3,060 million cubic metres of rain per year, and approximately 26 percent of the water reaches the sea.

The Kumbukkan Oya is the twelfth-longest river of Sri Lanka. It is approximately 116 km (72 mi) long. It runs across two provinces and two districts. Its catchment area receives approximately 2,115 million cubic metres of rain per year, and approximately 12 percent of the water reaches the sea.

The Mi oya is a 108 km (67 mi) long river, in North Western of Sri Lanka. It is the fifteenth-longest river in Sri Lanka. It begins in Saliyagama and flows northwest, emptying into the Indian Ocean thru Puttalam.