关键词: 荒漠化, 沙化, 动态变化, 土地转移变化分析

Abstract:

Ningxia is one of the regions that are affected by desertification and sandification.Research adopts the 4 consecutive years of desertification and sandification monitoring data from 2004 to 2019,analyzed the dynamic changes of Ningxia’s desertification and sandification land.It provides evidence for measures of Ningxia desertification and sandification,and assesses effectiveness analysis and formulation of prevention policies and planning.1)The area affected by desertification and sandification in Ningxia has decreased.From 2004 to 2019,the area of desertification land decreased by 33.937×10⁴ hm²,and the reduction rate was 11.4%;the area of sandification land decreased by 17.943×10⁴ hm²,and the reduction rate was 15.2%.2)The degree of Ningxia desertification and sandification land was reduced.The area of mild desertification land and moderate sandification land was increasing,other degrees of the area of desertification and desertification land were decreasing.3)In terms of land use transition,the largest shift from cultivated and forest lands has been toward grasslands.Grassland is the goal of desertification and sandification land governance at this stage.4)Transfer matrix analysis shows that in the three monitoring periods(2004—2009,2009—2014,2014—2019),the area of desertification land was transformed into non-desertification or exiting the area of desertified land to 11.101×10⁴ hm²、29.006×10⁴ hm² and 26.563×10⁴ hm²,respectively.The area of sandification land was transformed into non-sandification or exiting the area of sandification land to 11.29×10⁴ hm²、19.700×10⁴ hm² and 18.007×10⁴ hm²,respectively.5)Desertification and sandification processes also repeatedly manifest in conditions of land damage and destruction.The desert ecosystems and ecological conditions of sandy areas in Ningxia remain stable and favorable.In the future,grasslands governance of desertification and sandification will be the main governance targets.Concurrently,stringent measures should be implemented to prevent the rebound of governance effectiveness.

Key words: desertification, sandification, dynamic change, analysis of land transfer