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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 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.
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 irrigation-canal system predates the Hohokam culture by two thousand years and belongs to an unidentified culture. In North America, the Hohokam were the only culture known to rely on irrigation canals to water their crops, and their irrigation systems supported the largest population in the Southwest by CE 1300.
The report A Comprehensive Assessment of Water Management in Agriculture [1] was published in 2007 by International Water Management Institute and Earthscan in an attempt to answer the question: how can water in agriculture be developed and managed to help end poverty and hunger, ensure environmentally sustainable practices, and find the right balance between food and environmental security?
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 ...
Hohokam irrigation systems supported the largest population in the Southwest by 1300 CE. [12] Archaeologists working at a major archaeological dig in the 1990s in the Tucson Basin, along the Santa Cruz River, identified a culture and people that may have been the ancestors of the Hohokam. [ 13 ]
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 ...