越南下龙市不同时期土地利用变化特征

发布时间：2018-02-27 02:23

本文关键词： 土地利用变化特征越南发展下龙市　出处：《地球信息科学学报》2017年04期 　论文类型：期刊论文

【摘要】：在RS与GIS技术支持下,采用人机交互影像解译方法获取了1973、1988、2003和2014年4期土地利用数据,对越南建国到革新开放、革新开放至施行社会主义市场经济以及社会主义市场经济体制改革至今3个不同发展时期下龙市土地利用方式进行了定量研究,并从土地利用变化速度、程度及转移方向3个方面分析了过去40年该区域土地利用格局及时空变化特征。结果表明:(1)建国至今下龙市林地占比缩减了26.3%,城镇用地与工矿仓储二者占比扩大了4.3倍,耕地和红树林仅占下龙市总面积的3.6%和1.3%,同时养殖用地占比为5.5%。(2)建国初期至革新开放时期,下龙市土地利用变化主要是城镇用地和工矿仓储的增建,二者均上升4%左右,空间变化集中于鸿基区,林地减少8.1%,耕地减少3.2%,土地利用总格局未产生明显变化。(3)革新开放至施行社会主义市场经济时期,城镇用地和工矿仓储扩建程度分别为过去15年的3倍和2倍,鸿基和拜寨的城区建设逐渐趋于平衡,林地占比减至52.2%,新地类养殖用地出现,红树林锐减。土地利用空间格局呈现破碎化。(4)施行社会主义市场经济体制到至今,林地锐减至40.0%,土地利用格局由林地占主导地位变为人工地类占主导,耕地和养殖用地分布边缘化。
[Abstract]:With the support of RS and GIS technology, human-computer interactive image interpretation method was used to obtain the land use data of 1973-1988-2003 and 2014. From the reform and opening up to the socialist market economy and the reform of the socialist market economy system, the paper makes a quantitative study on the land use mode of Xialong City in three different development periods, and from the speed of land use change, The paper analyzes the land use pattern and spatial and temporal characteristics of the region in the past 40 years in terms of degree and direction of transfer. The results show that the proportion of forest land in Xialong City has been reduced by 26.3 times, and the proportion of urban land and industrial and mining storage has increased 4.3 times since the founding of the people's Republic of China. Cultivated land and mangroves only accounted for 3.6% and 1.3 of the total area of Xalong City, and the proportion of cultivation land was 5.5%. During the period from the beginning of the founding of the people's Republic of China to the period of reform and opening up, the land use change in Xalong City was mainly the addition of urban land and industrial and mining storage, both of which increased by about 4%. The spatial change is concentrated in Hongji area, the forest land decreases 8.1%, the cultivated land decreases 3.2%, and the total pattern of land use does not change obviously. The extent of urban land use and industrial and mining storage expansion is 3 times and 2 times of that of the past 15 years, respectively. The urban construction of Hongji and Baizhai gradually tends to be balanced, the proportion of woodland is reduced to 52.2%, and new land for breeding is available. Mangrove decreased sharply. The spatial pattern of land use presented fragmentation. 4) since the implementation of the socialist market economic system, the forest land has been sharply reduced to 40.0, and the pattern of land use has changed from forestland to artificial land. The distribution of cultivated land and breeding land is marginalized.
【作者单位】：南京大学地理与海洋科学学院;中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室;中国南海研究协同创新中心;兰州交通大学测绘与地理信息学院;中国地质大学信息工程学院;
【基金】：中国科学院先导专项南海环境变化承载力课题(XDA130104)
【分类号】：F301.2;P237;P208

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