Optimum Study on Landscape Pattern Change in the Western Region of Henan Province in Recent Nearly 20 Years
豫西地区近二十年景观格局优化分析

At the regional scale,the characteristics of the spatial and temporal changes of the land-use exert significant impact on the stability and structural difference.In the study area,the technologies of remote sensing(RS) and geographical information system(GIS) were applied,meanwhile three LANDSAT TM images of 1987,1995 and 2000 were interpreted.The com-bination of land-use GPS data and ground-based data was taken as the main data source.We analyzed the change of time and space landscape pattern in the study area with typical landscape index including the level of landscape and type of landscape level.The dynamic change of landscape patterns was dealt with according to landscape pattern connectivity and the degree of relationship of landscape feature.Through the perspective of function-start and then based on minimum cumulative cost algorithm,relevant factors in different time and space were found out,meanwhile human interference was intensified.Based on the landscape pattern on the timeline changes,further analysis of pattern changes was carried out and the driving force was generated by these changes in the ecological effects.Integrating natural factors(such as the slope,friction,distance etc.) with man-made interference factors(such as the type of landscape,the degree of fragmentation of the landscape,etc.),it is possible to optimize the methods used to identify visual effects needed to optimize the landscape pattern of key areas,in order to maintain ecological stability and socioeconomic development,to improve the rational distribution of the structure of space landscape,and to improve the watershed biodiversity and ecosystem services.