TAI Xiaoli,XIAO Wu,ZHANG Jianyong,et al.Research of Cultivated Land Fragmentation at the Township Level of Chaohu Basin Based on Landscape Metrics[J].Research of Soil and Water Conservation,2016,23(04):94-98.
基于景观指数的巢湖流域各县区耕地细碎化研究
- Title:
- Research of Cultivated Land Fragmentation at the Township Level of Chaohu Basin Based on Landscape Metrics
- Keywords:
- Gaofen-1; landscape index; cultivated land fragmentation; principal component analysis; land regulation
- 分类号:
- F301.24
- 摘要:
- 选取巢湖流域14个县区为研究对象，基于2015年高分一号遥感影像数据提取了巢湖流域耕地的空间分布数据，以景观格局为视角，构建基于6个景观指数的耕地细碎度度量指标体系，并进行了主成分分析，形成两个主成分（F1，F2）的耕地细碎化综合测算模型，以期为巢湖流域的土地整治工作提供理论基础和可行建议。结果表明：所选取的6个景观格局指数综合了面积、形状和分布等因素，是度量巢湖流域耕地细碎化程度的重要指标体系；主成分分析法的前两个主成分方差累计贡献率达96.969%，能够表达6个原始景观指数的大部分信息，其中，第一主成分是描述斑块平均面积和分布的综合指标，第二主成分是代表斑块形状信息的综合性指标。巢湖流域各县区耕地细碎化空间差异大，东部细碎程度最低，可大力促进农业规模化的发展；西部和南部四个县区细碎程度中等，主要与原始地形起伏较大有关，建议通过平整土地、合并零星地块的方式降低细碎度；北部三个县可以通过土地整治规整田块形状来降低耕地细碎化；合肥市所辖四区耕地细碎程度最大，与城市的扩展对农田的占用具有一定的联系，在城市发展中应当合理考虑城市拓展与耕地保护的关系。
- Abstract:
- Selecting 14 counties of Chaohu Basin as the research object, based on high spatial resolution image of 2015, we extracted the Chaohu Lake Basin spatial distribution data of cultivated land, in the perspective of landscape pattern, we built farmland fragmentation measurement index system based on 6 landscape indexes, and had carried out the principal component analysis, formed two principal component (F1, F2) of farmland fragmentation integrated measurement model, in order to provide the theoretical basis and feasible suggestions for the land regulation in Chaohu Basin. The results showed that selected 6 indexes included area, shape, distribution and other factors of cultivated land fragmentation, it was the measurement system of an important indicator of the Chaohu Lake Basin land fragmentation; the cumulative contribution rate of the first two principal components is 96.969%, so they can express most of the information of the 6 original landscape indexes, the first principal component is the comprehensive index about area and distribution, the second is the comprehensive index about shape; the cultivated land fragmentation spatial difference of Chaohu Basin is great, eastern fragmentation is minimum, we can promote the development of agricultural scale, the four counties of west and south are medium, and mainly related to the original topographic relief. We can reduce fragmentation according to leveling land and mergering scattered patch, the three counties of north can reduce land fragmentation through land shape regulation, the fragmentation of the four districts of Hefei is serious, and related to cities’ occupation to farmland. We should consider the relationship between city extension and farmland protection during the development of city.
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备注/Memo
收稿日期:2015-12-04;改回日期:2016-01-05。
基金项目:国土资源部公益性行业科研专项“土地综合整治生态景观设计技术研究”（201411006-05）
作者简介:台晓丽(1990-),女,山东省诸城人,硕士研究生,研究方向为土地复垦与生态修复。E-mail:taixiaolisd@163.com
通讯作者:肖武(1983-),男,湖南涟源人,副教授,研究方向为土地复垦与生态修复,3S,土地规划。E-mail:594800072@qq.com