Study On Ecological Effect Of Land Use Pattern Change In Fuzhou New District Based On GIS

Research based on fuzhou district 2000,2009 and 2015,on the basis of remote sensing image interpretation,using remoto sensing and GIS technology,set up land use classification system,analysis of fuzhou district,the space-time characteristics of land use change and select the different scales of landscape pattern index analysis of characteristics of landscape pattern of land use change in the study area;Based on the relative value of the land use type and ecological environment index concept,analysis the influence of land use change on regional ecological environmental quality;Ecological risk index model was constructed based on the laixlscape pattern index,caused by land use in the process of ecological risk analysis.In order to fuzhou new area development and construction,land use and landscape ecological eonstruction to provide scientific reference and basis.The main conclusions are as follows:(1)The period 2000-2015 water and arable land is the main land use types in the study area,31.86%and 28.07%respectively,and residence and the industrial and mining land for traffic increased,growth as high as 88.73%and 88.73%respectively,forest land,garden land,grassland,water area,cultivated land and unused land in different amplitude decrease trend.Under the effects of human disturbance,the speed of land use change from 2009 to 2015 than in 2000-2009 period.Transfer of land use types mainly embodied in each land use type to the residence and industrial and mining traffic transfer is given priority to,among them with water,farmland,forest land transfer is the largest The increase of construction land and industrial and mining land for traffic is a major cause of land utilization comprehensive index rose,had been increased by 18.53%during the study,namely in the 15 years of ffizhou district land use has been in development.(2)From the point of view of landscape patch types,varioius patches in the study area of types of landscape fragmentation degree,complexity,diversification trend of the plaque is more apparent,from hunan interference.Look from the landscape overall level,the degree of landscape fragmentation and heterogeneity in the study area increased,the overall shape of landscape tends to complicate,the overall distribution is more decentralized,raising the level of landscape diversity,this is a direct reflection of the new urbanization,industrial expansion.Landscape index of spatial response mainly reflected in the changes of landscape index of main peak for the urban construction and highway,ports,airports and other human activities active construction land,forest land,water,agricultural land concentration distribution area,landscape type relatively single,human activities affect the relative is not obvious.(3)Based on the ecological environment index of land use and land use type of the calculation results of ecological contribution rate,the environment quality of fuzhou district from 2000 to 2015 in a trend of decline gradually,and greater decline between 2000 and 2009,indicate that the regional land use change poor ecological effect,overall ecological benefit of land use continues to decline,tend to be more fragmented landscape function,optimization on ecosystem structure.Water flows,forest land and place of residence,industrial and mining transport the changes in the direction of the inpact on the ecological environment deterioration is the most great,the ecotogical value of low to high ecological value of the land use type of land use type change,can effectively improve the ecological environment.(4)Look from the regional difference,except for all the rest of the villages and towns during the study of land use index of ecological environment all have different degree of decline,the biggest drop in is jiangyin town of fuqing city and town,east town,changle khan hunan namely ecological environrent quality decreased the most.Land use ecological value high value area of land use type 1s given priority to,such as forest land,water,grassland ecological environment foundation,high ecological value of land use general area is given priority to with cultivated land,and no obvious change during the study period,the land use ecological low value area of land use and cultivated land,settlements and mining traffic 1s given priority to,the ecological envirorunent foundation is bad,and the high ecological value during the period of research of land use types in the fall.(5)From 2000 to 2015,the rapid advance of urbanization,the regional landscape ecotogical index changes,the fragmentation degree of forest land,cultivated land,waters rise,industrial and mining transportation and settlement separation index and landseape dominance index decreased,in addition to the urban construction land,all the patch types of landscape disturbance and darage degrees are felling.The increase of the degree of danger of regional ecological system gradually,fuzhou district ecological risk index rising trend overall.In a high degree of ecological risk value in the study area are mainly water and unused,and area in rapid increase,in the ecological risk in low degree of geologic landscape type while relative stability is better,but still keep strong interference by human activities,area in gradually reduce,medium risk area area is relatively stable,mainly for construction land.