Biwako - Lake and Rivers

1. Biwako: basic facts

1. 1.1 Geographical features
2. 1.2 Data
3. 1.3 Comparison with other lakes - in Japan and worldwide
4. 1.4 Topography and climate
   1. 1.4.1 Topography
   2. 1.4.2 Climate
      1. 1.4.2A Precipitation
      2. 1.4.2B Temperature
5. 1.5 Population
6. 1.6 Land use
7. 1.7 Source of water

2. Water control at Biwako

1. 2.1 History
   1. 2.1.1 History of flood disasters
   2. 2.1.2 Record of Inundations
   3. 2.1.3 Controlling Biwako water level and flooding - Change in severity and extent of flooding around Biwako shoreline
   4. 2.1.4 Biwako General Development Project
2. 2.2 Water-level control by Seta River Weir
   1. 2.2.1 History of the Seta River Weir
   2. 2.2.2 Role of the Seta River Weir (control of Biwako water level))
   3. 2.2.3 How the weir works
   4. 2.2.4 Monitoring weather and lake conditions to control water level
3. 2.3 Flood control at Seta River Weir
   1. 2.3.1 General water-level control (Target peak throughput in Yodo River system)
   2. 2.3.2 Lake water-level adjustment to delay upstream weir discharge during downstream peak flow
   3. 2.3.3. Operating the weir to adjust flow according to differences in downstream and upstream peak water levels
4. 2.4 Water supply from the Seta River Weir
   1. 2.4.1 Meeting downstream water needs throughout the year
   2. 2.4.2 Different modes of operation at Seta River Weir
   3. 2.4.3 Drought conditions (Photo: Ukimido no longer ‘floats’ on the water)
5. 2.5 Water level control for environment
6. 2.5.1 Environment at Biwako
7. 2.5.2 Water-level management at Seta River