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

Abstract

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

CLC Number:

Q149

ZHAO Shuqing, FANG Jingy un, TANG Zhiyao, PIAO Shilong . Spatio-temporal patterns of land use and land cover changes i n Honghu Lake Region, Hubei Province,China[J]. Chinese Journal of Applied Ecology, 2001, (5): 721-725.

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