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应用生态学报 ›› 2001, Vol. ›› Issue (5): 721-725.

• 研究论文 • 上一篇    下一篇

洪湖湖区土地利用/土地覆盖时空格局研究

赵淑清, 方精云, 唐志尧, 朴世龙   

  1. 北京大学城市与环境学系和生态学研究与教育中心, 北京 100871
  • 收稿日期:2001-01-15 修回日期:2001-04-01
  • 通讯作者: 赵淑清,女,1972年生,在读博士生.主要从事湿地和生态遥感方面的研究工作,已发表论文5篇.E-mail:sqzhao@urban.pku.edu.cn
  • 基金资助:
    国家重点基础研究发展规划项目(G20000a6801)和世界自然基金会(WWF)资助项目(CN0079-09).

Spatio-temporal patterns of land use and land cover changes i n Honghu Lake Region, Hubei Province,China

ZHAO Shuqing, FANG Jingy un, TANG Zhiyao, PIAO Shilong   

  1. Department of Urban and Environmental Scien ce, and Center for Ecological Research and Education, Peking University, Beijing 100871
  • Received:2001-01-15 Revised:2001-04-01

摘要: 利用1987、1993和1998年的遥感影像资料,研究了江汉平原洪湖湖区土地利用/土地覆盖的时空变化.土地覆盖类型分为水体、湖滩植被、洪泛地、农田、裸地和居民地6类.运用GIS(Arc/Info)软件,将不同时期的土地利用/土地覆盖格局进行了清晰的空间表达;通过叠加3个不同时段的影像分类图,计算出各种土地利用/土地覆盖类型转变成其他类型的比例.在1987~1993年期间,水体和洪泛地的面积分别增加了15.54%和9.62%,而1993~1998年期间这两种类型的变化较小,分别为0.8%和3.19%;农田面积从1987年的577.62km2减少到1998年的188.58km2,减少约2/3;在研究期间,裸地面积没有明显变化;湖滩植被的面积在1987~1993年期间降低18.60%,而在1993~1998年期间增加8.47%.土地利用/土地覆盖状况的变化与湖区退田还湖及降雨状况的年际变化有关.

关键词: 地理信息系统, 洪湖湖区, 土地覆盖变化, 斑块特征, 遥感, 时空格局

Abstract: Land use and land cover change can play a pivotal role in studies on environme ntal changes. The objective of this research was to identify changes in land cov er in Honghu Lake Region, Hubei Province, China. These changes were characterize d by using Landsat TM satellite imagery for periods 1987, 1993, and 1998 to unde rstand the dynamic of land cover over time. The land coverage was grouped into s ix types:water body, lake beach vegetation,flood plain,crop land, open land, an d settlement. By applying Geographical Information System (GIS), spatial pattern s of land cover in different stages were explored. By overlaying three classific ation maps, the percentage of each type of land cover converted into other categ ories was computed.The area of water body and flood plain increased by 15.54% an d 9.62% respectively from 1987 to 1993, compared with a slight increase between 199 3 and 1998 by 0.58% and 3.19 % respectively. Crop land area consistently decr eased from 577.62km2 in 1987 to 188.58km2 in 1998, whilst no clear difference was shown in the area of open land during this period. The area of beach vegetation decreased by 18.60 % for the period 1987~1993 and then increased by 8.47% f or t he period 1993~1998. These changes observed during this study period may be rel ated to success of restoring natural lake area from forgiving cultivation, as we ll as impact of inter annual variation in rainfall characteristics.

Key words: GIS, Honghu Lake Region, Land cover change, Patc h characteristics, Remote sensing, Spaito tempoal pattern

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