Research On Landscape Spatial Pattern Of Chongyi Hakka Terrace System

The Chongyi County which is the cradle of the cradle of Hakka,is located in the south part of South Jiangxi.The Hakka ancestors migrated here,with indomitable will,production tools and farming technology which are from the ancestral land.They strived to integrate the rice culture of the Central Plains and the integration of Gannan Mountain hilly terrain,relying on the mountain terrain to build farmland,so as to cultivate Chongyi Hakka terrace.In this paper,Taking Chongyi County of Jiangxi Province County Heritage area as regional research is to study landscape pattern of Chongyi Hakka terrace system.In this paper,Chongyi County Land Use Database is referred to as data base,starting from the theory of landscape ecology,under the support of GIS and RS.The first is generating the landscape type map of Chongyi Hakka terraced landscape system.Then,The landscape pattern of the system is studied through the selected landscape index,analyzing the landscape characteristics of the core area and the non-core area were analyzed.And combined with the terrain factor to analyze the distribution characteristics of landscape pattern,the following conclusions can be drawn:(1)By means of the landscape pattern analysis software: Fragstats,the landscape pattern of Chongyi Hakka terrace system is analyzed.The result shows: from the landscape component,The main advantage of forest landscape types is a prominent feature of Hakka Chongyi terrace system..The forest landscape has the characteristics of strong connectivity and low damage degree,due to the change of human shape of forest landscape becoming more regular;area of terrace and common farmland landscape types are after forest landscape,so cultivated land resources are relatively abundant,followed by water and residential land.It is indicated that a large number the forest is a important base for the sustainable existence of terraced fields,and agricultural activities are very active in the region.The number of patches and patch density of residential land and cultivated land are relatively large,so that the fragmentation degree is larger,and the shape is more complex.The settlements were scattered among in the forest and farmland patches.This is also the direct reflection of the terraced landscape in the mountain area,which highlights the characteristics of the organic distribution of the forest bamboo forest tea garden village terrace water flow in the terraced area.However,the number of forest patches is the least,so the landscape characterized by relatively fragmented and connected.(2)The number of patches which accounted for 91.19% of the total number of landscape patches in the landscape are less than 5 hm2,which shows that there are many such small patches in the landscape,but the landscape area of 91.24% is at the >l000hm2 level,which indicates that the landscape showing a few large patches of centralized distribution and a large number of small patches alternative distribution and relatively broken pattern.In the Chongyi Hakka terrace system landscape,most of landscape types have a high proportion with forest land,which shows the importance of forest land as the dominant type of landscape in the landscape pattern.(3)The core area is about 1/3 of the non-core area,except terraced fields,the proportion of other types of landscape area in core area is less than in non-core areas,cultivated land of core area is mainly terraced.In the two areas,the number of residential land and cultivated land is more,and the patch density is high.The core area of the forest patch connectivity is stronger than the non-core areas,and two areas have formed a good connectivity,to relative aggregation landscape layout;diversity index of two regions and evenness are not high,so the land use types are not diverse and the landscape types are not evenly distributed.(4)Landscape pattern distribution characteristics: the vast majority of water,ordinary farmland,residential land,construction land,beach and garden are distributed in below 300 m.The proportion of these types landscape decreases with altitude increasing,and concentrated in the range of 0-15 DEG slope.At the same time,with the increase of slope,the landscape distribution decrease gradually,while the terrace and forest land,mining land and grassland which mostly distributed in high altitude are similar.