GIS-based Analysis on the Landscape Spatial Patterns of Land-use in Henan Province

By employing land-use data in Henan province,this article interpret and draw a remote sensing map of Henan province with the help of GIS and RS techniques.The landscape spatial patterns of land-use in research area were quantitative analyzed by using landscape indices.The results show that the dominant pattern of the landscape in Henan province is farm land;the proportion of its total area accounts for about 65 percent of all sub-areas,being followed by construction land and forest land.Forest land is mainly located in the northern,western,southwestern and southern mountains of Henan province.Urban construction land is inlaid in the whole research area,whose distribution pattern is closely related to cultivated farm land.Other patch types are distributed in research area.There was an obvious spatial difference in landscape spatial patterns of land-use in Henan province,because of the double effects of natural conditions and human activities.Four landscape ecological indices,such as landscape diversity index,landscape dominance index,landscape fragmentation index and landscape evenness index were chosen to analyses the landscape spatial patterns of land-use in research area.The results show that similar change trends were observed in all sub-areas in landscape diversity and evenness indices,but the change of landscape dominance index was reverse to landscape diversity and evenness indices.The landscape diversity and evenness indices in highlands and mountainous areas are higher than that in other sub-areas;however landscape dominance index is higher in plain areas than in highlands and mountainous areas.This is because the effect of human agricultural production activity in the highlands and mountainous areas is minor.In comparison,strong human disturbance and agricultural development reduced landscape diversity in the plain area.On the other hand,landscape fragmentation index of the transitional zones between mountainous region and plain is higher than that of others because of the influences of stronger human disturbance and weak ecological environment in those regions.The double effects of natural conditions and human activities have intensified landscape fragmentation process.Finally,the author suggests that more measures should be taken to improve the ecological environment and promote rational utilization of land resources in Henna province,especially in ecological fragile transitional zone.