Human Disturbance Process Analysis of Ecological Landscape in Changsha-Zhuzhou-Xiangtan Megalopolis in Recent 40 Years
TANG Yu-meng;ZOU Bin;XU Shan;CHEN Jing-wen;LI Ming;Central South University;
With Changsha-Zhuzhou-Xiangtan megalopolis as the research object,this paper established its land use classification system by combining the data characteristics of satellite remote sensing,land use and the national geographic census. Meanwhile,through land use transfer matrix model and the landscape human disturbances measure model,this study obtained the spatial-temporal distribution of the city's land use transfer matrix and human disturbance index,and further discussed the relationship between the ecological landscape and the human disturbances of Changsha-Zhuzhou-Xiangtan megalopolis. From the perspective of land use change,we can conclude that significant changes were taken place during 1978 to 2015 on the proportion of farmland,garden and forest land,and construction land. There has been a continuous loss of the farmland from 3 544. 67 km~2 to 2 571. 18 km~2; the area of garden and forest land has declined first then risen with the total loss of 177. 89 km~2; the construction land has experienced a gradual increase from 80. 56 km~2 to 1 252. 85 km~2 during the years. The land use change of Changsha-Zhuzhou-Xiangtan megalopolis can be divided into two phases: first phase from 1994 to 2000 and second phase from 2010 to 2015,from which we discovered that the construction land increased through occupying the farmland and garden and forest land. With spatial-temporal analysis of landscape human disturbance index,we found that the high value of disturbance index was mainly distributed in central and nearby areas of cities in 1978-2015. And affected by human activity,the city central region transferred its land use from farmland and garden land to construction land,and the surrounding regions presented a mutual transformation between farmland and garden and forest land; with the increasingly rapid development of urbanization,the human activity has made a growing influence on city ecological landscape,especially to city central areas.
【Fund】： 国家自然科学基金(41201384);; 地理国情监测国家测绘地理信息局重点实验室开放基金(2014NGCM01);; 湖南省地理国情监测项目(HNGQJC201503)资助
【CateGory Index】： P901
【CateGory Index】： P901