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| THE SPATIAL STRUCTURE OF SETTLEMENTS SYSTEM AND INFLUENCE PATTERN IN THE ARID INLAND RIVER BASIN: A CASE STUDY IN SHIYANG RIVER BASIN |
| WEI Wei1, SHI Pei-ji1, WANG Xiao-yan1, WANG Xue-ping2, WANG Xu-feng3 |
1. College of Geographical and Environment Science, Northwest Normal University, Lanzhou 730070, China;
2. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract Selecting three different remote sensing images(2000,2006 and 2010) as the data source, and cost weighted distance as well as urban-rural potential index are used to adjust and improve the field strength model. Besides, urban-rural expansion intensity index and urban-rural expansion speed index are also used to analyze urban and rural settlements spatial structure of Shiyang River Basin. The results show that: ① in the process of the urban-rural settlements spatial expand which dominated by central town, the small town is gathering and the large town is dispersing; ② the spatial structure of urban-rural settlements system show Jinchang, Wuwei as axis point, and Yongchang, GuLang, Minqin and Tianzhu as axis line; ③ the key contact among urban and rural settlements are transportation network, but inside of urban and rural settlements the administrative contact are much dominated; ④ as the core of urban settlement, the advantages of Liangzhou District and Jinchuan District are obvious in comparison with other settlement systems. Spatial reciprocity intensity between systems of Wuwei is slightly higher than that of Jinchang and Sunan and significantly higher than other settlements. Liangzhou and Jinchuan play a more important role in the urban agglomeration.The spatial connection direction appears in a circle shape around Liangzhou and Jinchuan along the traffic corridor in an axis including Lan-Xin railway and Lian-Huo highway from south to north.
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Received: 09 July 2012
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2013, Vol. 28 
