• 关键词：东太湖  沼泽化  趋势  原因

• 基金项目：国家自然科学基金(49671073号);江苏省自然科学基金(BJ98055);国家九五攻关(960080201);水利部太湖流域

• 吴庆龙
• 中国科学院南京地理与湖泊研究所, 南京 210008

• 胡耀辉
• 中国科学院南京地理与湖泊研究所, 南京 210008

• 李文朝
• 中国科学院南京地理与湖泊研究所, 南京 210008

• 陈开宁
• 中国科学院南京地理与湖泊研究所, 南京 210008

• 潘继征
• 中国科学院南京地理与湖泊研究所, 南京 210008

• 摘要：东太湖沼泽化呈加速发展的趋势:无沼泽化湖区面积显著减少,由1959年的90%降至23.9%;沼泽化综合指数由1959年的1.47增加到2.41.这与近40年来湖区人类活动强度增强有关:沿湖合理的池塘养殖可以延缓局部湖区的沼泽化进程;但外来污染、围垦、滥种挺水水生植物以及网围养殖的过度发展等显著地促进了沼泽化的发展.

• Abstract：Over 50% of East Taihu Lake is in swampiness.From 1959 to 1997, the average swampiness index of East Taihu Lake rose from 1.47 to 2.41, the percentage of non swampiness declined from 90% to only 23.9%.The percentage of low level swamp and slight swamp increased from 4.2% and 0 to 35% and 28.5%.In the past 40 years, the increasing speed was quite different.The index increased about 0.358 from 1993 to 1997, but it only got a raise of 0.08 from 1980 to 1993.Apparently it suggests that the swampiness is speeding up at present.The causes of the speeding swampiness include reclamation, exotic poilution, transplantation and excessive pen culture.Reasonable and scientific development of fish pen culture can slow down the process of swamping through use of water plant, however excessive pen culture may affect utilization of water plant greatly and promote swampiness.Therefore it is urgent to take measures to control them.

• Key words：East Taihu Lake  swampiness  tendency  cause

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