The Nagaragawa Estuary Barrage
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Outline of Nagara River Basin
Outline of Nagara River Basin
Roles of the Nagaragawa Estuary Barrage
Roles of the Nagaragawa Estuary Barrage
The History of Flooding and Flood Control on the Nagara River
History of Ringed Land Community
Flood Control During the Horeki Period
Improvement During the Meiji Period (1867-1911)
Disasters in Recent Years
Flood Protection and Prevention of Saltwater Intrusion
River Improvement
Saltwater Intrusion and Salt Damage
Prevention of Saline Damage Due to Dredging and Water Resources Development
Countermeasures Against Inflowing Water
Effectiveness of the Nagaragawa Estuary Barrage for Flood Control
Water Use
Water Supply and Demand Planning
Water Shortages in the Kiso River Water System
New Water Supplies
Increased Reliability of Water Supply
Benefits of Nagara Estuary Barrage During the Drought of 2000
Major Environmental Surveys Carried Out in Relation to the Nagaragawa Estuary Barrage Project
Major Environmental Surveys Carried Out in Relation to the Nagaragawa Estuary Barrage Project
Survey Prior to Starting the Project
Surveys Carried Out During the Project
Surveys Carried Out on Completion of the Barrage
Surveys Carried Out After the Barrage Went into Operation
Outline of the Nagaragawa Estuary Barrage
General View of Nagaragawa Estuary Barrage Facilities
Fundamental Aspects of the Gate Operation
Operation an Ordinary Time
Operation During Flood
Operation During a Storm Surge
Operation in Anticipation of Tsunami
Gate Hoists
Fishways
Attraction-Flow-Type Fishway
Lock-Type Fishway
Naturally-Shaped Fishway
Lock
Method of Navigation
Conservation of River Environment
Conservation of River Environment
Preservation of Water Quality
Newtypes of River Environment
Observation Facilities in the Nagara River Basin
Observation Facilities in the Nagara River Basin
Go to Nagaragawa Estuary Barrage
Go to Nagaragawa Estuary Barrage
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