{
  "generated_at": "2026-11-10T13:16:12.935486+09:00",
  "source": "東京都水防災総合情報システム（オープンデータ）の水位CSV",
  "notice": "過去の実測の集計です。将来の水位を示すものではありません。",
  "definition": {
    "baseline": "局の記録全体の中央値",
    "event": "水位が基準+上昇しきい値以上の連続期間（6時間以内の途切れは同一、継続1時間未満は除外）",
    "t_half_h": "ピークから、上昇分の半分に戻るまでの実測時間（時間）",
    "remain_24h_pct": "ピークの24時間後に残っていた上昇分の割合（%）"
  },
  "stations": [
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      ]
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}