Manno Lake


Manno Lake in Mannō, Kagawa, Japan, is a man-made irrigation reservoir with a reserve capacity of 15.4 million tons. It is vaguely shaped like a human hand.

History

;701-704 : Michimori Ason, the lord of Sanuki Province, erects the first dam.
;818 : Mannō Pond dam ruptures due to flooding.
;821 : Kukai is dispatched to oversee renovations of Mannō Pond dam, with construction being completed in approximately 3 months. Between the years of 821 and 1184, the Manno Pond dam collapses and is subsequently restored many times.
;1184 : After the collapse of the dam in 1184, all rebuilding efforts were abandoned until 1628. During this period, people settled in the basin constructing houses and cultivating fields. The settlement was named Ikeato Mura.
;1628 : By order of Takamatsu Domain feudal lord Ikoma Takatoshi the fushin-bugyō Nichijima Hachibe’e begins renovations of the Mannō Pond dam.
;1631 : The Takamatsu domain completes renovations of the dam.
;1854 : Dam collapses due to earthquake.
;1870 : Restoration of dam completed. Afterward restorations, the three separate constructions of the Tenkawa headrace began, in order to supplement water intake from the Dokigawa, resulting in an increase of water volume three times.
;1996 : Manno Pond selected as one of the One Hundred Soundscapes of Japanby the Ministry of the Environment.
;2000 : Mannō Pond Conduit Gates registered as Japanese cultural landmark-.
;2005: The Manno Pond dam receives the Dammed Lake Hyakusen certification from the Dam Watershed Environmental Improvement Center.
;2010: Manno Pond receives the Pond Hyakusen certification from the Japanese Ministry of Agriculture, Forestry, and Fisheries.

Data

;Current data
;Data from 821
;Data from 1631
;Data from various embankment constructions

Yuru-Nuki

A "Yuru" is a water reservoir plug. Yuru-Nuki ceremony, which is held on annually on June 15 at Manno Pond, releases water to irrigate fields for the rice-planting season.

Access

;Car
;Railway
;Airplane