地理科学进展

地理科学进展 ›› 2004, Vol. 23 ›› Issue (6): 90-95.doi: 10.11820/dlkxjz.2004.06.011

• GIS应用与土地利用变化 • 上一篇    下一篇

土地利用变化对洪水调蓄能力的影响 ——以洞庭湖区为例

李仁东   

  1. 中国科学院测量与地球物理研究所, 武汉 430077
  • 收稿日期:2004-10-01 修回日期:2004-10-01 出版日期:2004-11-25 发布日期:2004-11-25
  • 作者简介:李仁东(1962-),男,湖北公安县人,研究员。主要从事资源环境遥感与地理信息系统应用研究工作。E-mail:lrd@asch.whigg.ac.cn
  • 基金资助:

    中国科学院知识创新工程项目(KZCX2-SW-415)。

The Impact of the Land Use Change on the Floodwater Adjustment and Storage ——A Case Study on the Dongting Lake Area

LI Rendong   

  1. Institute of Geodesy and Geophysics, CAS, Wuhan 430077, China
  • Received:2004-10-01 Revised:2004-10-01 Online:2004-11-25 Published:2004-11-25

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摘要：

本文在中国资源与环境时空数据库的支持下，利用20世纪70年代末期、90年代末期获取的陆地资源卫星图像和GIS分析方法，对洞庭湖区近20年的土地利用/覆盖变化进行了遥感调查，进而以水域与其他土地利用类型之间的转移变化为基础，对区域洪水调蓄能力的变化进行了估算。结果表明，变化比较显著的地类有3类：耕地减少了1.97%，各类建设用地总计增加了14.88%，水域面积增加的幅度为8.77%。因土地利用变化导致的区域洪水调蓄能力增加估计为6.23亿m3,由此增加的湖泊容积，最大为13.01亿m3。

关键词: 调蓄能力, 洞庭湖区, 土地利用/覆被变化, 遥感

Abstract:

The research on the land use/cover change and its impact on ecologic environment is one of the frontiers and the hot spots in the globe change research. Based on the Chinese resource and environment spatial-temporal database, and using the Landsat TM, MSS and ETM data which were acquired in the end of 1970's and 1990's respectively, we analyzed the spatial-temporal characteristics of land use/cover changes in the Dongting Lake area, then made an assessment on changes of volume of the adjusted flood and lake water after the land use/cover change. The result shows that, during the last twenty years, the cultivated land decreased by 1.97% of total cultivated land. The construction land and the water area expanded, with an increase of 14.88% and 8.77% respectively. The ability of adjusting the flood water in this area had grown by 6.23×108m3, and the maximum storage capacity of the lake water had increased by 13.01×108m3 due to the land cover changes.

Key words: Dongting Lake area, land use/cover change, remote sensing, the ability of adjusting flood