Analysis on Spatial Pattern of Blowouts in Otindag Sandy Grassland Based on ALOS Data
Received date: 2012-12-22
Revised date: 2013-02-05
Online published: 2013-02-05
Based on ground survey information and fusion data of high-resolution multi-spectral band (10 m spatial resolution) and panchromatic band (2.5 m spatial resolution) of ALOS satellite images, we quantitatively analyzed the spatial pattern characteristics of blowouts in Otindag sandy grassland using ArcGIS and Fragstats 3.3 software. Results showed that: (1) The blowouts area accounted for 6.1% of the studied area, and the density was 0.026 per hectare, they distributed widely and aggregated in local; (2) According to the different developmental stages, the shapes of the blowouts could be divided into saucer, oval-shaped, groove and irregular shaped; (3) The relationship was significantly positive between patch area and patch shape index and patch fractal dimension respectively, and blowouts with complex shapes was formed by a number of independent blowouts; (4) Compared with blowout width and depth, the relationship between area and length was more significant; (5) Wind erosion base level was high, and the depth of the blowouts was no more than 5 m; (6) The parameters length-width and width-depth were mutually affected.
Key words: ALOS data; Otindag sandy grassland; blowouts; spatial pattern
Huercha1 , 2 , WANG Xiao-jiang1 , ZHANG Wen-jun1 , LIU Yong-hong1 , HAI Long1 , ZHANG Lei1 , Sulenggaowa3 . Analysis on Spatial Pattern of Blowouts in Otindag Sandy Grassland Based on ALOS Data[J]. Journal of Desert Research, 2013 , 33(3) : 662 -667 . DOI: 10.7522/j.issn.1000-694X.2013.00095
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