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Liquid-ring pumps are typically used as vacuum pumps, but can also be used as gas compressors. The function of a liquid-ring pump is similar to a rotary vane pump, with the difference being that the vanes are a rigid part of the rotor and churn a rotating ring of liquid to form the compression-chamber seal. They are an inherently low-friction ...
A catchment site within the system is referred to as a wewa (වැව) in Sinhala, and this term is translated into English as "tank". [7]These tanks are connected in a series, referred to as a cascade, so that an ephemeral waterflow can be used, stored for future use, or conveyed elsewhere. [7]
Long after King Pandukabhaya, King Parākramabāhu I had many tanks built, with one large tank called Parakrama samudraya still providing significant water for agriculture. Many rulers of Sri Lanka contributed to the development and construction of tanks all over the Raja Rata, the northern part of the country. [2]
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 ...
During 1952 to 1957, the tank was rehabilitated by the Department of Irrigation of Sri Lanka. [2] The reservoir and hotel is situated with the Kaludiya Pokuna Forest archeological site. The reservoir measures 4.8 km (3.0 mi) and 2.3 km (1.4 mi) at its longest length and width respectively, with a catchment area of 102 km 2 (39.4 sq mi) and a ...
An elevated water tank, also known as a water tower, will create a pressure at the ground-level outlet of 1 kPa per 10.2 centimetres (4.0 in) or 1 psi per 2.31 feet (0.70 m) of elevation. Thus a tank elevated to 20 metres creates about 200 kPa and a tank elevated to 70 feet creates about 30 psi of discharge pressure, sufficient for most ...
Yodha Ela functions in a way of a moving reservoir because of its single banking aspect which is different from the present day double banking irrigation canals'. It feeds water in an area of 470 km 2 (180 sq mi) feeding 4,630 ha (11,400 acres) of paddy lands and 120 small tanks on its way from Kala Wewa to Tissa Wewa [7]
The tank was built by Kulakkottan (604-614 AD) and further developed by King Parakramabahu the Great. [2] It was also known as Gangathala Vapi at the time. The reservoir has a catchment area of 216 km 2 (83 sq mi) and a capacity of 135 million cubic metres (4.8 × 10 9 cu ft).