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	Modeling patch characteristics of farmland loss for site assessment in urban fringe of Beijing, China
	Liu X. N. ; Zhang W. W. ; Li H. ; Sun D. F.
	2013
关键词	farmland loss loss risk site analysis logistic regression analysis power-law distribution geographic information-system agricultural land evaluation landscape indexes assessment lesa
英文摘要	Farmland protection and delimitation in the urban fringe considers not only natural factors but also the spatial characters and site factors. Taking Daxing District, Beijing in China as a case study, this paper used landscape ecology and power-law methods to analyze and evaluate farmland loss during the period of 2004-2007 based on the interpretation results of SPOT5 remote sensing images in 2004 and 2007. At the patch level, we selected four landscape indices, namely patch size, shape index, the nearest neighbor distance between farmland and construction land (including residential land and other construction land), and cropping type, to evaluate the risk of farmland loss and establish a farmland site analysis indicator system. The results showed that patch size and shape index have a significant positive correlation with farmland loss, whereas the distance to construction land has a clear negative correlation with farmland loss. As regards cropping type, fallow farmland is much easier for non-agricultural use than cultivated farmland. The relative transition ratio among vegetable land, fallow farmland and cultivated farmland is 1:5.6:1. The patch size of lost farmland follows a power-law distribution, indicating that not only small parcels but also large parcels can be lost. Patch size less than 4 ha or more than 15 ha is in high loss risk, between 4 ha and 10 ha in medium loss risk, and larger than 10 ha and less than 15 ha in low risk. Farmland with a more regular shape has a higher likelihood of loss. Patch shape index less than 2.0 is in high loss risk, between 2.0 and 3.0 in medium loss risk, and larger than 3.0 in low risk. Construction land has a varying impact on farmland loss, the residential land effected distance is 1000 m, and that of the other construction land is 2000 m. This analysis showed the relationships between site factors and farmland loss, and the analysis framework can provide support and reference for farmland protection and delimitation of prime farmland in China.
出处	Chinese Geographical Science
卷	23
期	3
页	365-377
收录类别	SCI
语种	英语
ISSN号	1002-0063
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30385]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Liu X. N.,Zhang W. W.,Li H.,et al. Modeling patch characteristics of farmland loss for site assessment in urban fringe of Beijing, China. 2013.

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