ACIDIC LAKES AND STREAMS IN THE UNITED-STATES - THE ROLE OF ACIDIC DEPOSITION

被引:87
作者
BAKER, LA
HERLIHY, AT
KAUFMANN, PR
EILERS, JM
机构
[1] US EPA,UTAH STATE UNIV,ENVIRONM RES LAB,CORVALLIS,OR 97333
[2] E&S ENVIRONM CHEM INC,CORVALLIS,OR 97339
关键词
D O I
10.1126/science.252.5009.1151
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
A statistically designed survey of lakes and streams conducted by the Environmental Protection Agency in acid-sensitive areas of the United States, the National Surface Water Survey (NSWS), was used to identify the role of acidic deposition relative to other factors in causing acidic conditions in an estimated 1180 lakes and 4670 streams. Atmospheric deposition was the dominant source of acid anions in 75 percent of the acidic lakes and 47 percent of the acidic streams. Organic anions were dominant in one-fourth of the acidic lakes and streams; acidic mine drainage was the dominant acid source in 26 percent of the acidic streams. Other causes of acidic conditions were relatively unimportant on a regional scale. Nearly all the deposition-dominated acidic systems were found in six well-delineated subpopulations that represent about one-fourth of the NSWS lake population and one-third of the NSWS stream population.
引用
收藏
页码:1151 / 1154
页数:4
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