
Keywords: شاخص اختلال; Acid deposition; Surface water recovery; Sulfate; Nitrate; CAAA; U.S. Clean Air Act Amendments of 1990; SO2; sulfur dioxide; NOx; nitrogen oxide; μeq; microequivalents; ANC; acid neutralizing capacity, μeq Lâ1; DOA; dissolved organic acids, μeq Lâ1