Supported by RS and GIS

the landscape types in the study area are charted based on the landscape classification using remote sensing images obtained in 1994 and 2003.Landscape patterns in the Chang'an River basin

apart of the water source area of the middle-route of the South-to-North Water Diversion Project

are analyzed in view of landscape patch characters

landscape diversity

and landscape fragmentation by selecting the indices of patch number

diversity

dominance

evenness

fractal dimension

and fragmentation.The analysis of the ecological landscape patterns indicates that the patch number in the basin increased obviously from 469 in 1994 to 1518 in 2003.Disturbed by human activities

landscape diversity index increased by 0.61 from 1994 to 2003

but the level of landscape diversity was low.The landscape fragmentation index in the basin increased from 1994 to 2003.Among the landscape patch types

the fragmentation index for the three landscape patch types(artificial woodland

dry land

and grassland) was high and was easily disturbed by human activities.