| 摘要: |
| 洞庭湖区除洞庭湖外,在圩垸内尚分布着为数众多的内湖,近50年来,由于人类活动的强烈作用,内湖与洞庭湖一样呈现出急剧萎缩的态势,1km2以上内湖的数量由20世纪50年代的255个减少到目前的122个,湖泊面积也由1534.4km2缩小至644.2km2,其衰亡的速度甚至超过了洞庭湖.分析洞庭湖区内湖急剧萎缩的原因,其主要表现为前期是围湖造田,后期为湖泊鱼塘化. |
| 关键词: 洞庭湖区 内湖 萎缩 |
| DOI：10.18307/2005.0302 |
| 分类号: |
| 基金项目:中国科学院知识创新工程方向性项目(KXCX3-SW-331)中国科学院南京地理与湖泊研究所知识创新工程特别支持重大项目"我国不同气候区湖泊演变与重大环境问题、发生机制及其控制对策研究"共同资助． |
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| Changes of Inner Lakes in Lake Dongting District In the Past 50 Years |
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HUANG Qun, JIANG Jiahu
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Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
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| Abstract: |
| Except the main Lake Dongting, there are some inner lakes located at low-lying fields surrounded by protective embankments in Lake Dongting areas. Due to the influence of human activities, inner lakes was shrinked as well in pace with the main lake, especially in the past 50 years or so. Comparisons of lake status statistics in different periods, i. e. 1950s, 1980s and 2001, revealed that the number of inner lakes (with areas more than 1 km2) had been decreased fiora 255 to 122 since 1950s, with total inner lakes area from 1534.4 km2 to 644.2 km2, showing a more rapid shrinkage than that of the main lake. That the reclamation of lake area for farming in early years especially in 1950s-1980s, and fish culture activities in 1980s and onwards are the two main reasons for inner lake shrinking. |
| Key words: Lake Dongting district inner lakes shrinking |
