Acta Geographica Sinica ›› 1997, Vol. 64 ›› Issue (4): 339-344.doi: 10.11821/xb199704007

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ASSESSMENT OF LAND DEGRADATION AND ITS SPATIAL AND TEMPORAL VARIATION IN THE UNRECLAIMED HILLS AND PLATFORMS OF THE JINHUA——QUZHOU BASIN: A CASE STUDY

Lu Jinfa1, Cui Shuhong1, Lin Li1, Huang Xiuhua2   

  1. 1. Institute of Geography, CAS, Beijing 100101;
    2. Institute of Remote Sensing Application, CAS, Beijing 100101
  • Received:1995-11-01 Revised:1996-06-01 Online:1997-07-15 Published:1997-07-15

Abstract: According to the definition of land degradation/desertification by UN, vegetation coverage, erosional morphology and surface material were chosen as the criteria for asseessing land degradation in this paper.Based on this, assessment, mapping and comparison of land degradation between 1950’s and 1980’s were carried out by the interpretation of aerial photos of the two periods and by using a Fuzzy model. It was shown that the degraded land caused by water action accounts for 36% of the total studied area, in which severely and very severely degraded land, with the characteristics of bare badland, occupied 5% of it. Moreover, obvious downslope zonation and spatial variation of land degradation were observed in the studied area. It was proved that the severely and very severely degraded land existed even before the foundation of the country and could be traced back to the Ming and Qing Dynasties at least. Development of land degradation manifested itself as drastic reduction of non degraded land and relevant increase of slightly and moderately degraded land from 1950’s to 1980’s.

Key words: Jinhua—Quzhou, Basin, land, degradation, spatial, and, temporal, variation

CLC Number: 

  • X171