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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.
It is one of the main sources of foreign exchange for Sri Lanka and accounts for 2% of GDP, generating roughly $700 million annually to the economy of Sri Lanka. It employs, directly or indirectly over 1 million people, and in 1995 directly employed 215,338 on tea plantations and estates. Sri Lanka is the world's fourth largest producer of tea.
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.
Roots can survive waterlogging by forming aerenchyma, inducing anaerobic metabolism, and changing root system architecture. [14] In irrigated agricultural land, waterlogging is often accompanied by soil salinity as waterlogged soils prevent leaching of the salts imported by the irrigation water.
Sri Lanka is pockmarked with many irrigation dams, with its water resource distributed across nearly the entirety of the island for agricultural purposes via artificial canals and streams. Utilization of hydro resources for agricultural production dates back to the pre-Colonial era, with the current crop production now largely dependent on ...
Sri Lanka Freedom Party: 22 March 2015 – 12 August 2020 Ministry of Irrigation and Water Resources Management Chamal Rajapaksa: Sri Lanka Podujana Peramuna: 12 August 2020 - Gotabaya Rajapaksa: Ministry of Irrigation Roshan Ranasinghe: Sri Lanka Podujana Peramuna: 23 May 2022 - Present: Gotabaya Rajapaksa: Ministry of Irrigation
The Department of Agriculture (DOA) functions under the Ministry of Agriculture of Government of Sri Lanka is one of the largest government departments with a high profile community of agricultural scientists and a network of institutions covering different agro ecological regions island wide. DOA focuses on maintaining and increasing ...