Subak (irrigation)
Subak is the water management (irrigation) system for the paddy fields on Bali island, Indonesia. It was developed in the 9th century. For the Balinese, irrigation is not simply providing water for the plant's roots, but water is used to construct a complex, pulsed artificial ecosystem. The system consists of five terraced rice fields and water temples covering nearly . The temples are the main focus of this cooperative water management, known as "subak". Religious relationship. Subak is a traditional ecologically sustainable irrigation system that binds Balinese agrarian society together within the village's Bale Banjar community center  and Balinese temples. The water management is under the authority of the priests in water temples, who practice Tri Hita Karana Philosophy, a self-described relationship between humans, the earth and the gods. Tri Hita Karana draws together the realm of spirit, the human world and nature. The overall subak system exemplifies this philosophical principle. Water temple rituals promote a harmonious relationship between people and their environment through the active engagement of people with ritual concepts that emphasize dependence on the life-sustaining forces of the natural world. Rice is seen as the gift of god, and the subak system  is part of temple culture. System. Subak components are the forests that protect the water supply, terraced paddy landscape, rice fields connected by a system of canals, tunnels and weirs, villages, and temples of varying size and importance that mark either the source of water or its passage through the temple on its way downhill to irrigate subak land. Rice, the water required to grow rice, and subak, the cooperative canal system that controls the water, have together shaped the landscape over the past thousand years. Water from springs and canals flows through the temples and out onto the rice  paddy field. In total, Bali has about 1,200 water collectives and between 50 and 400 farmers manage the water supply from one source of water. The property consists of five sites that exemplify the interconnected natural, religious, and cultural components of the traditional subak system. The sites include: These architectural sites are inspired by several different ancient religious traditions, including Shaiva Siddhanta and Samkhyā Hinduism, Vajrayana Buddhism and Austronesian cosmology. World Heritage Site status. On 6 July 2012, subak was enlisted as a UNESCO World Heritage Site. Cultural Landscape of Bali Province: the Subak System as a Manifestation of the  Tri Hita Karana Philosophy, consist of Supreme Water Temple "Pura Ulun Danu Batu"r and Lake Batur, Subak Landscape of "Pakerisan" Watershed, Subak Landscape of "Catur Angga Baturkaru", and Royal Temple of "Taman Ayun" has been inscribed upon a World Heritage List of The Conservation concerning the protection of the World Cultural and Natural Heritage. Inscription on this list confirm the outstanding universal value of cultural or natural property which deserves protection for the benefit of all humanity. Museum. In 1981, the Subak Museum opened in Tabanan Regency.