RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2009, Vol. 18 >> Issue (9): 865-.

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ON SPATIAL DISTRIBUTION OF ECOLOGICAL POTENTIAL BASED ON GIS IN JINSHA RIVER WATERSHED (YUNNAN PART)

XIA Jisheng1|2| YANG Shuhua1| WAN Ye2| WANG Yuchao2| ZENG Hongyun2| WEN Liejin2   

  1. (1.Institute of Ecology and Geobotany| Yunnan University| Kunming 650091| China； 
    2.School of Environment and Earth Science| Yunnan University| Kunming| 650091| China)
  • Online:2009-09-20

Abstract:

Ecological Potential is an indicator to measure the comprehensive effects of multiecological factors confecting.Jinsha River watershed (Yunnan section) is abundant in landscapes and discrepancy in the topography and physical，chemical characteristics of the soil from the upper down to the lower of the watershed.These variations result in the different spatial distributions of the ecological potential in each landform unit.GIS is characterized by the powerful spatial analysis function，which provides the quick and convenient analysis tool for the study on the complex spatial distribution of the ecological potential.Using ArcGIS as the spatial analysis software，based on the vegetation classification map，this paper studied the spatial variation laws and made the 3D fluoroscopy of the ecological potential power of Jinsha River watershed (Yunnan section).With these data，the paper compared the relationship of the ecological potential and soil spatial distribution in different landform units within the watershed by selecting the soil element.The results of this study are as follows.The ecological potential of the watershed increases in the direction of northwest gradually.From the result of Variation Function，the ecological potential of the watershed is of the anisotropy，and is of good autocorrelation along the strike of the watershed.The soil type plays a certain control role in the spatial distribution of ecological potential.The GIS methodologies adopted in this paper，particularly the 3D fluoroscopy function and application of Variation Function provides references to the other similar researches.Additionally，the distribution laws of ecological potential in Jinsha River watershed (Yunnan section) calculated in this paper provides the theory base to the ecological protection in this region.

Key words: Jinsha River watershed/ GIS/ ecological potential/ Variation Function

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