Analysis on the landscape spatial pattern of land-use in Danjiangkou reservoir catchment in Henan Province

Based on the land-use date interpreted from LandsatTM image of 2007 and land-use map obtained by using ArcGIS software,with the aid of Fragstas 3.3,the landscape spatial pattern of land-use in Danjiangkou catchment of Henan province was studied at aspects of landscape pattern and landscape level.Landscape indices such as patch area,percentage of landscape,patch density,landscape shape,fractal dimension,landscape diversity and evenness were selected to acquire more landscape information.Results showed that major land-use types in the study area were forest land,farmland and bare rock,with a 57%,19% and 15% of the total land area,respectively.Broadleaf was concluded as the matrix of the study area with the highest landscape percentage(41%),and its connectivity and integrality were best.The patch density(0.23) and landscape shape index(LSI,53.04) of shrub were biggest,suggesting a high degree of fragmentation.Likewise,the high landscape fragmentation occurred in arid farmland(LSI,51.97).The landscape types in the study area were rich and the landscape diversity was high.Howerve,a fragmentation of landscape was found in the watershed due to the disturbance of human activity such as forest cutting and intensive reclamation.Therefore it will be detrimental to environment protection of the water head site.Ecological compensation mechanisms of regional economic should be established as early to weaken ecological destruction by human activity and promote self-healing of local ecology.