Thank you for viewing. The Arakawa Daiichi Regulation Pond is located in the middle reaches of the Arakawa River, which has a vast river width, and is a facility that plays an important role in flood control and water supply replenishment of the Arakawa River. 《Facility Specifications》 Flood control capacity: 39 million m3 Water storage capacity: 10.6 million m3 (During the flood season, 3 million m3 is used for flood control) Regulation pond area: 5.8 km2 Reservoir area: 1.18 km2 Construction period Entire regulation pond: Fiscal year 1970 - Fiscal year 2003 (34 years) Reservoir section: Fiscal year 1980 - Fiscal year 1996 (17 years) ver,1.0 (2010.01) #DamCard #Arakawa #DaiichiChoseichi #Reservoir Thank you for viewing.