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| Mapping the vegetation suitability in the Coarse Sandy Hilly Area of the Loess Plateau,China |
| Wen Zhongming1,He Xiaohui2,Jiao Feng1,Tim R.McVicar3,LingTao Li3,Tom G.Van Niel3 |
| 1.Institute of Soil and Water Conservation,NWSUAF,CAS and MWR,712100,Yangling,Shannxi;2.School of Environment and Water Conservancy,Zhengzhou University,450001,Zhengzhou:China;3.CSIRO Land and Water,GPO Box 1666,2601,Canberra,ACT,Australia |
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Abstract Vegetation suitability mapping is valuable for the selection of species for implementing the Re-Vegetation Program in the Coarse Sandy Hilly Catchments of the Loess Plateau,China.A Boolean model was introduced,which used thin plate smoothing spline interpolation method to model the distribution of precipitation and temperature,and analyzed the suitability of 38 species using GIS techniques as well as considering the requirement of these species for environmental conditions.Then we overlaid the single suitability map of 38 species,and got the frequency map of species for a specified site.Here high frequency means the higher suitability of a site for re-vegetation.The result showed that with combination of topographic analysis based on DEM and GIS functions the spatial changes of vegetation suitability can be modeled.These spatial changes on the screen using Visual Basic language and GIS functions was also demonstrated,thus helping decision makers to have an intuitionistic view of species and site suitability changes over large area.Although some more powerful models such as GLM and GAM were not employed due to the data limit,yet the method here still can provide some insightful implication for similar studies in this area.
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Received: 06 July 2006
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