Search results
Results from the WOW.Com Content Network
The tank cascade system (Sinhala: එල්ලංගාව, romanized: ellaṅgāva) is an ancient irrigation system spanning the island of Sri Lanka. It is a network of thousands of small irrigation tanks ( Sinhala : වැව , romanized: wewa ) draining to large reservoirs that store rainwater and surface runoff for later use.
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.
The National Water Supply and Drainage Board (commonly abbreviated as NWSDB) is the National Organization responsible for the provision of safe drinking water and facilitating the provision of sanitation to the people in Sri Lanka. The organization had its beginning as a subdepartment under the Public Works Department for water supply and drainage.
Major irrigation schemes of Sri Lanka, as evident from the earliest written records in the Mahawansa, date back to the fourth century BCE (Parker, 1881; [1] Brohier, 1934). ). The purpose and determination in the construction of the irrigation systems are depicted by the words of Parakrama Bahu I, 1153–1186 CE: "Let not even a drop of rain water go to the sea without benefiting
The whole project, including sewerage and sanitation improvement in Jaffna, is expected to cost $164.04 million (Rs 17,880 million) of which $90 million will come from an Asian Development Bank loan, $40 million from a French Development Agency loan and the remaining $34.04 million from the Sri Lankan government.
The Mahaweli Development program (Sinhala: මහවැලි සංවර්ධන වැඩසටහන) is known as the largest multipurpose national development program in the history of Sri Lanka and is also considered the keystone of the government's development program that was initiated in 1961.
Throughout history, people have devised systems to make getting water into their communities and households and disposing of (and later also treating) wastewater more convenient. [ 1 ] The historical focus of sewage treatment was on the conveyance of raw sewage to a natural body of water, e.g. a river or ocean , where it would be diluted and ...
Sewerage (or sewage system) is the infrastructure that conveys sewage or surface runoff (stormwater, meltwater, rainwater) using sewers. It encompasses components such as receiving drains , manholes , pumping stations , storm overflows, and screening chambers of the combined sewer or sanitary sewer .