JOURNAL OF NATURAL RESOURCES ›› 1997, Vol. 12 ›› Issue (4): 357-362.doi: 10.11849/zrzyxb.1997.04.010

• Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS • Previous Articles     Next Articles

LAND DEGRADATION MECHANISM AND MANAGEMENTCOUNTERMEASURES IN THE BLOWNSAND AREA OFNORTHERN SHAANXI PROVINCE

Liu Yansui, Ni Shaoxiang, Zha Yong   

  1. Department of Geography, Nanjing Normal University, Nanjing 210097
  • Received:1997-03-03 Revised:1997-04-21 Online:1997-12-25 Published:1997-12-25

Abstract: n this paper, on the basis of analyzing the environmental background of the study area, the mechanism, time space law and expansion trend of land degradation are studied systematically by means of combining qualitative analysis with quantitative one and combining remote sensing with GIS technique. The conclusions are as follows: (a) In the study area, population is the basic contributing factor of land degradation and the land degradation is a result of uncoordinated development of ecologically vulnerable environment and social economy. In especial, the potential vulnerability of the natural environment is transformed into practical destruction because of unreasonable land use and management way. (b) The main type of land degradation in the study area is land desertification. On the whole, during the past 30 years the degree of land degradation has been intensifying, and the land degradation type has showed a diversified tendency. (c) Land degradation is a dynamic process, which possesses four characteristics, namely, long term, gradual change, continuity and locality. Therefore, higher precision and efficiency in monitoring, appraising and forecasting the land degradation can be obtained if remote sensing and GIS technique are used. (d) To manage the land degradation should take the landscape ecology theory and sustainable development ideas as the guide, consider both the ecological benefits and the economic benefits, and adopt varied technical ways . Besides, it is necessary to do the easy first and then the difficult and to take measures according to local conditions.

Key words: and degradation, desertification, blownsand area, management countermeasures