首页> 美国政府科技报告 >Episodic Acidification: Occurrence, Causes and Significance to Aquatic Resources.211 Proceedings of the 1998 Pennsylvania Acidic Deposition Conference. Held in 211 University Park, Pennsylvania on September 14-16, 1998
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Episodic Acidification: Occurrence, Causes and Significance to Aquatic Resources.211 Proceedings of the 1998 Pennsylvania Acidic Deposition Conference. Held in 211 University Park, Pennsylvania on September 14-16, 1998

机译:发作性酸化:水生资源的发生,原因和意义.211 1998年宾夕法尼亚州酸性沉积会议论文集。 1998年9月14日至16日在宾夕法尼亚州211大学公园举行

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Episodic acidification, the short-term decrease of acid neutralizing capacity211u001e(ANC) during hydrological events, commonly occurs in streams and lakes around the 211u001eworld. in localities receiving low levels of atmospheric deposition of N and S 211u001ecompounds, acidic episodes (ANC < or = 0) do not occur unless watershed sources 211u001eof acidity are present. In regions receivng high levels of atmospheric deposition 211u001eof acidic N and S compounds, acidic episodes with episodic minimum pH levels < or 211u001e= 5 and high inorganic Al concentrations are common. Acidic episodes can have 211u001eadverse effects on fish populations and other biota in streams. Assessments and 211u001eevaluations of the aquatic effects of acidic deposition should consider 211u001eexplicitly the occurrences and consequences of episodic acidification.

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