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Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds
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中国における水質回復のための窒素管理
ChaoQing Yu1,2, Xiao Huang3,4, Han Chen3
1Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, China. chaoqingyu@yahoo.com.
Nature
|March 1, 2019
まとめ
中国
科学分野:
- 環境科学
- エコロジー
- 水質管理
背景:
- 人類の活動によって 窒素の循環が大きく変化しています
- 中国 の 窒素 肥料 の 大量 の 消費 と,様々な 源 から の 排水 は,広範囲 の 水 汚染 を 引き起こし て い ます.
- 地元の水質管理には,窒素の境界線を設定することが重要です.
研究 の 目的:
- 1955年から2014年までの中国全土の水体への窒素排出の空間的なパターンを推定する.
- 人為的な窒素排出量を安全基準に照らして評価する.
- 現在の汚染削減の努力と将来の戦略の可能性を評価する.
主な方法:
- 水質の観測を組み合わせたものです
- 農業やその他の源からのシミュレートされた窒素排出データを使用した.
- 1955年から2014年の歴史データを分析した.
主要な成果:
- 中国のほとんどの省は1980年代半ばまでに重要な地表水質基準 (1.0 mg N/L) を超えていた.
- 現在の人為的な窒素排出量 (14.5 ± 3.1 Mt N/年) は安全基準の2.7倍 (5.2 ± 0.7 Mt N/年) である.
- 国内排水処理により2014年に排出量が0.7トンの減少し,耕地管理の改善により年間2.3トンの排出量が減少する可能性がある.
結論:
- 中国の栄養素のリサイクル率を36%から87%に引き上げ 清潔な水を回復させるためには 変革的な変化が必要なのです
- 高い栄養素のリサイクルは 重要な投資で技術的に実現可能である.
- 共同利益には灌用のリサイクルされた排水と 改善された生態系サービスが含まれます
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