Spatial And Temporal Pattern Of Land Use/Cover Change And Its Driving Mechanism Analysis In The Beijing-Tianjin-Tangshan Metropolitan Area In Recent30Years

Followed by the Yangtze River Delta and Pearl River Delta citygroup Beijing-Tianjin-Tangshan Metropolitan Area has become China’seconomic growth in the third pole. As the focus of north economicdevelopment, it plays an important strategic role in the politics andeconomic development of our country. Land use/cover change hasbecome a very important subject topic in the twenty-first Century, andgradually become the core areas of research in the fields of geographystudy. This article mainly from the land use/cover change perspective,using" the land use/cover classification by interpretation (directinterpretation dynamic patch/patches) method" and" land dynamicdegree model" to analysis of the each landuse type about circulation ofBeijing-Tianjin-Tangshan Metropolitan Area in nearly30years,qualitatively analysis of the driving mechanism, and to validate itsaccuracy with the perspective of literature.This article aims to: through making a count on various types of landuse/cover circulate of Beijing-Tianjin-Tangshan regions in the last30years, further to analysis of the spatio-temporal patterns of land use/cover change of Beijing-Tianjin-Tangshan Metropolitan Area; throughqualitatively analyzing based on the economic data (GDP), demographicdata, the integration of macro policy and land use/cover change datahave been combined, to get the driving mechanism of the regional landuse/cover change; in the analysis of results of foundation, take thestrategy of sustainable development for the purpose, try to make atheoretical support and suggestion by the macro-control, town planning,land management of the government.Through the study we found that nearly30years in Beijing-Tianjin-Tangshan Metropolitan Area, to about10years for a unit:land use/cover change degree appears increasingly fierce situation,specifically the rate of change is urban land> industrial construction land> unused land> rural land> waters> arable land> grassland> woodland,in which urban land dynamic index of land use reached4.71in nearly30years, it means average annual its area growth of4.71%, it shows thatthe city changes process is extremely swift and violent. From the aspectof space, Beijing city, the land use/cover change degree is from smoothto rough, especially the city urbanization process is more and moreintense, and in the recent ten years reached a climax; Tianjin city changeshas been in steady state, nearly ten years began to appear severe situation,in which the Beijing-Tianjin-Tangshan water area transformation occursmostly in Tianjin; because three city of Hebei area due to smaller base,the land use/cover change presents from severe to stationary and then toviolent tendency; in general, Beijing city changes degree is more andmore intense, and it comes a gap of growing among Beijing Tianjin andthree city of Hebei. About driving mechanism, Beijing-Tianjin-TangshanMetropolitan Area is still in the rapid development period of urban area,the population agglomeration to the core city is scale and great strength;economic growth is often built on the large-scale development andutilization of land resources, economic growth and acceleratedconstruction promote the course that the city urbanization, transfer ofrural population to the city, city expansion, rural residential land to aperipheral extrusion, city population density has increased, but it’s oftenless than the speed of urban land expansion rate, it is also affected by theactual conditions; policy is playing a decisive role on the land use/coverchange too.According to the research results, and the demand about how to goesbetter and faster of Beijing-Tianjin-Tangshan Metropolitan Area, thispaper gives several suggestions: speeding up the industrial structuraladjustment to knowledge intensive direction, phasing out backward productivity and heavy pollution enterprises, strict monitoring the "threewastes" emissions of heavy industrial enterprises; rationally mining ofgroundwater, increasing the protection of Haihe River and other majorrivers; to better complete the regional collaboration, the cooperationbetween Tianjin seaside new developed area and Tangshan Caofeidiannew area is particularly important; enhancing the radiation effect ofcentral city, speeding up the construction of small towns and the satellitecity, can make the industry layout become more reasonable, morebalanced on the regional economic development; the last and the mostimportant is the adjustment of land resources spatial structure.