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以象山港海岸带为研究区域,利用1985年,1995年,2005年和2015年4期TM遥感影像数据,将土地利用类型分为8大类,通过计算土地利用类型动态度、土地利用转移矩阵、土地利用结构信息熵以及土地开发利用强度综合指数4种指标模型,分析了象山港海岸带1985-2015年土地开发利用的速度、结构、程度以及时空变化。结果表明:(1)1985-2015年象山港海岸带养殖用地及盐田扩张速度最快,动态度最高可达11.97%,建设用地扩张速度次之,但面积增幅最为显著,滩涂缩减速度最大,耕地面积明显减少;(2)30年间土地类型主要转变方向为耕地转为建设用地,其次为林地转变为耕地;(3)信息熵逐时期增加,土地利用结构均质性不断加强,区域发展在逐渐走向成熟;(4)各时期土地利用强度指数变化率均大于零,象山港海岸带土地开发利用强度不断增强。
Taking Xiangshan Harbor coastal zone as the research area, this paper divides the land use types into 8 major categories by using TM remote sensing image data of 1985, 1995, 2005 and 2015. By calculating the dynamic changes of land use types, the land use transfer matrix , The information entropy of land use structure and comprehensive index of land exploitation and utilization intensity, the paper analyzes the speed, structure, degree and temporal-spatial variation of land development and utilization in Xiangshan Port from 1985 to 2015. The results showed as follows: (1) The farming land and salt field in Xiangshan Port Coastal Zone had the fastest expansion rate from 1985 to 2015, with the highest dynamic range of 11.97%. The construction land expansion rate was the second, but the area increase was the most significant. (2) The main change of land type in 30 years is from cultivated land to construction land, followed by conversion of forest land to cultivated land; (3) Information entropy increases with time and the homogeneity of land use structure is continuously strengthened and the regional development is gradual (4) The rate of change of land use intensity index was greater than zero in each period, and the intensity of land development and utilization in Xiangshan Port coast belt continued to increase.