Shinano River Water Gate Partially Closed for Saltwater Intrusion Prevention Concludes
Niigata City Announcement – August 5, 2025
Niigata City is pleased to announce the conclusion of the partial closure of the Shinano River water gate, a measure implemented to prevent saltwater intrusion into the river. This operation, aimed at safeguarding the quality of river water for municipal use, has now reached its successful completion.
For a period, a portion of the Shinano River water gate was partially closed to mitigate the potential impact of saltwater flowing upstream from the estuary. This proactive step was taken in accordance with the city’s commitment to ensuring a stable and reliable supply of potable water for its residents and to protect the delicate river ecosystem.
The decision to implement this measure was based on regular monitoring of water quality and tidal conditions, identifying a period where saltwater intrusion posed a potential risk to the river’s freshwater balance. The partial closure effectively created a barrier, preventing the upstream movement of higher salinity water.
We are pleased to report that the necessary conditions for the closure have now passed, and the water gate operations have been concluded as scheduled. The city’s dedicated water management teams have been diligently monitoring the situation throughout this period and can confirm that the river’s freshwater levels have been successfully maintained.
Niigata City deeply appreciates the understanding and cooperation of its citizens during this period. The successful management of the Shinano River’s water resources is a vital aspect of our city’s infrastructure and public health. This operation underscores the city’s ongoing efforts to adapt to environmental changes and to ensure the long-term sustainability of our water supply.
Further information regarding water quality and ongoing river management initiatives can be found on the Niigata City official website.
信濃川の塩水遡上に関するお知らせです（信濃川水門の一部閉鎖を終了）
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新潟市 published ‘信濃川の塩水遡上に関するお知らせです（信濃川水門の一部閉鎖を終了）’ at 2025-08-05 06:00. Please write a detailed article about this news in a polite tone with relevant information. Please reply in English with the article only.