Abstract:

Based on geography information system (GIS) and remote sensing (RS) techniques，the information of wetland of Dongting Lake in 2000 was interpreted using the Landsat TM.Using landscape structure analysis program FRAGSTATS and the method of principal component analysis and covariance matrix analysis，various wetland landscape indices were calculated and major landscape indices were selected to analyze the landscape pattern in Dongting Lake area.The result showed that Shannon Diversity Index，Patch Size coefficient of Standard，Patch Richness Density and Mean Patch Fractal Dimension could well reflect the characteristics of the wetland lanascape.There were obvious differences between the spatial differenciation and the state of structure in the study area，which showed large differences in the proportion of total land area among different types of wetland within the wetland landscape，the distribution of different wetland types was uneven，and the farmland and lake landscape had obvious advantage over the others.The cities both in the lakefront of Dongting Lake core area and in the outer of the lake core area showed the complexity and diversity of landscape pattern .