To home+Lake Biwa Today
Lake Biwa Development Integrated Operation & Maintenance Office
About Lake Biwa Management Activities The Effect of the Project
 
□Water level control
　 ● Target water levels for Lake Biwa
□Maintenance and Management of Facilities
　 ● Patrols and weeding of lake levees
　 ● Inspection and maintenance of sluice gates,sluiceways and drainage facilities
□Operation of Facilities
　 ● In drought conditions:internal drainage facilities
　 ● In flood conditions:water supply facilities and gates for water level and bypass aqueducts
■Gathering Environmental Data in the Lake Biwa Basin
　 ● Hydrologic and meteorological data
　 ● Lake Biwa information provided by comprehensive automatic observation stations
　 ● Lake Biwa water environment survey including submerged plant observation

■Gathering Environmental Data in the Lake Biwa Basin
Hydrologic and meteorological data
The Kinki region supplies some 14 million of its population of 20 million with water from Lake Biwa. It is in effect an immense water reservoir that supplies water for a large area starting from its upstream areas to the downstream region that encompasses Kansai International Airport and its surroundings.
Rain prediction by the radar
The water sentence observation of Lake Biwa
Observing the changing rainy area over the entire Kinki region by radar allows making forecasts of rainfall expected in the river basin or dam area. The many observation stations installed around Lake Biwa and the Yodo River basin monitor rainfall, water level, water quality and flow, and consistently transmit the measured data.
map
map
Top▲
Lake Biwa information provided by comprehensive
automatic observation stations
Comprehensive automatic observation stations were constructed off the shore in the South Lake (offshore at Ogoto) and the North Lake (off the mouth of the Ado River), allowing observation of elements such as water level, wave height, water quality, wind direction, wind speed and temperature.
The observation data is constantly sent via telemeter to Lake Biwa Development Integrated Operation & Maintenance Office.
Ogoto Offshore Comprehensive
Automatic Observation Station
The Comprehensive Automatic Observation Station
off the Mouth of the Ado River
Automatic Observation Station Automatic Observation Station
While up to a 30 day's worth is stored in rechargeable batteries by solar cell, a stable supply of electric power is sent to the observation devices. The water is quite deep (some 70 meters) at the point of installation, so the rocking and pitching of the observation station was minimized by connecting an anchor and a buoy with wires.
　
Cross of Automatic Observation Station
Top▲

  ■Contact us
Copyright(c) 2003 Incorporated Administrative Agency Japan Water Agency Lake Biwa Development Integrated Operation & Maintenance Office All Rights Reserved.