インドのマハラシュトラ州デッカンの火山地帯の地下水の水文化学評価
Vasant Wagh1, Vaishnavi Raut2, Kartik Tadse3
1School of Earth Sciences, Swami Ramanand Teerth Marathwada University, Nanded, India. wagh.vasant@gmail.com.
Scientific reports
|September 2, 2025
まとめ
この研究では,マハラシュトラのデカン火山地方の地下水の質を統計的方法とGISを使用して評価しました. 南西部の地域では汚染が高く,飲料水や農業用水への影響も大きい.
科学分野:
- 水土学
- 環境科学
- 地化学
背景:
- 地下水の質の評価は,特にデッカンの火山地帯のような複雑な地質環境を持つ地域では,持続可能な水資源管理に不可欠です.
- 地下水に影響を与える水質化学的過程を理解することは,汚染源を特定し,様々な用途に水の適性を確保するために不可欠です.
研究 の 目的:
- インドのマハラシュトラ州デッカンの火山地帯の地下水の水質化学的評価を行う.
- 地下水の汚染に影響を与える要因と地質学的原因を特定する.
- 地下水の飲料用および農業用途の適性を評価する.
主な方法:
- 2022年のモンスーン前とモンスーン後の季節に 60個の地下水サンプルを採取して分析する.
- アメリカ公衆衛生協会 (APHA) のプロトコルに従って,pH,EC,TDSなどのパラメータとともに,主要なカチオンとアニオンの水化学分析.
- 統計的手法 (相関マトリックス,主要構成要素分析,クラスター分析) とGISを空間分析と汚染マッピングに適用する.
- 地下水の汚染指数 (PIG),パイパー三線図,ギブス図,ウィルコックス図などのツールを使用し,包括的な評価を行いました.
主要な成果:
- 両シーズンの地下水のサンプルは,pH,TH,NO3,F,Kのインド標準局 (BIS) の制限値を超えており,潜在的な健康リスクを示しています.
- 地下水の汚染指数 (PIG) の空間分布マップが示すように,調査地域南西部の地域では地下水の汚染がより高かった.
- 試料の100%はカルシウム-マグネシウムと二酸化炭素-炭酸塩の水型に分類され,主に岩石と水の相互作用によって影響を受けた (98.34%).
- 地下水の質は一般的に農業に適度である一方で,特にモンスーン後の季節には,かなりの割合が許容区に入ります.
結論:
- デッカン火山地方の地下水は,化学的にカルシウム・マグネシウム・バイカーボネート型で,主に地質学的な形成によって影響されています.
- 特定のイオンの濃度が高くなると 飲料水に危険性があり 局所的な汚染ホットスポットには 標的を絞った管理戦略が必要です
- この研究は,自然と人為的な影響を考慮して,地域の持続可能な地下水管理と政策立案のための貴重な洞察を提供します.
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