□ The Lake Biwa Comprehensive Development Project and The Lake Biwa Development Project □ Flood Control Measures 　 ● Construction of Lake Levees and Roads for Management 　 ● Internal Drainage Facility Construction 　 ● River Engineering 　 ● Dredging of the Seta River ■ Water Utilization Measures 　 ● Reconstruction of the Seta River Weir 　 ● Maintaining the Functions of Harbor Facilities and Waterways 　 ● Relocation of Water Intake Facilities Offshore □ Preservation of the Natural Environment 　 ● Preservation and Creation of the Foreshore 　 ● Phragmites Planting 　 ● Water-friendly (Rubble-mound) Revetments □ The investigation of the historical resources and preservation □ The Effect of the Project 　 ● The 1994 Drought 　 ● The 1995 Flood ■Water Utilization Measures The Seta River Weir was reconstructed to ensure up to an additional 40 m3 of water per second of domestic and industrial water for the downstream regions. In addition, water intake facilities were moved offshore, ports dredged and docks engineered. Reconstruction of the Seta River Weir To reduce the needless outflow of valuable water in droughts,the bypass aqueduct was constructed nearby the Seta River Weir to regulate discharge accurately even at low water levels. Maintaining the Functions of Harbor Facilities and Waterways The mooring wharfs were engineered and the waterways and docks, dredged to maintain the functions of harbor facilities and waterways even at low water levels. ■ Cross section The dredging and digging depth was determined so that ships can pass and dock even if the water level drops to B.S.L - 2.0 meters. B.S.L.= Biwako Basic Surface Water Level Top▲ Relocation of Water Intake Facilities Offshore The water intake facilities were relocated offshore and additional pumps were installed to ensure a sufficient amount of water even if water levels drop on Lake Biwa. ■ Cross section The water intake facilities were set offshore so they could be used even if the water level drops to B.S.L. - 2.0 meters. B.S.L.= Biwako Basic Surface Water Level   ■Contact us Copyright(c) 2003 Incorporated Administrative Agency Japan Water Agency Lake Biwa Development Integrated Operation & Maintenance Office All Rights Reserved.