□ 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 ■Flood Control Measures To minimize flood damage around Lake Biwa, lake levees, roads for management, internal drainage facilities and the like have been constructed. Construction of Lake Levees and Roads for Management Levees were constructed in low land districts around the lake to prevent flooding of Lake Biwa. Top▲ ■ Cross section Levees were constructed to freeboard 1.2 meters over the design high water level of +1.4 meters. Furthermore, creating a large foreshore limited wave height on shore, effectively lowering the height of the levees. B.S.L.= Biwako Basic Surface Water Level Internal Drainage Facility Construction River Engineering Dredging of the Seta River Fourteen internal drainage facilities (drainage pumps and sluice gates) were constructed in six areas particularly vulnerable to flood damage in order to drain water from rice paddies and the like that have been inundated in a flood. To prevent flooding on bending rivers, high-bedded rivers and the like, engi-neering projects were undertaken to, among other things, raise embankments, dredge and dig riverbeds and widen rivers. The Seta River was dredged to increase its discharge capacity to facilitate water flow. Top▲   ■Contact us Copyright(c) 2003 Incorporated Administrative Agency Japan Water Agency Lake Biwa Development Integrated Operation & Maintenance Office All Rights Reserved.