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[1]CHENG Shujie,WANG Zhongling,WANG Ting,et al.Land Use Change and Ecological Security Assessment of the Central Arid Zone in Ningxia Based on GIS[J].Research of Soil and Water Conservation,2017,24(04):342-348.

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Land Use Change and Ecological Security Assessment of the Central Arid Zone in Ningxia Based on GIS

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 04 Page number: 342-348 Column: Public date: 2017-08-28

Title:: Land Use Change and Ecological Security Assessment of the Central Arid Zone in Ningxia Based on GIS

Author(s):: CHENG Shujie¹, WANG Zhongling¹, WANG Ting¹, ZHU Zhiling²; 1. Civil Engineering and Architecture, Yinchuan Energy Institute, Yinchuan 750105, China;
2. College of Resources and Environment, Ningxia University, Yinchuan 750021, China

Keywords:: land use; ecological security; the central arid zone in Ningxia; GIS

CLC:: X826

DOI:: -

Abstract:: The assessment of land use is one aspect of the studies on sustainable development. In order to testify these views, a case study was conducted in the central arid zone in Ningxia. The existing ecological problems and major ecological processes were analyzed, as well as land use/cover change and its effect on soil erosion, ecological water requirement and biodiversity were explored by using RS and GIS techniques combining with field investigation in this study. We analyzed land use change in the central arid zone in Ningxia from 2004 to 2014, and then established an evaluation index system on the basis of Hazard-State-Immune model. Entropy methods were used for determining index weights, for evaluating ecological security on 30 m×30 m grid scale in the period from 2004 to 2014. The results of the study were as follows. The change of land use followed the regional policy, the areas of grassland, woodland expanded largely, the areas of farmland and unused land kept decreasing, construction land and water area were almost same， irrigated land increased slowly. Combined with the existing research results and practical situation, based on cluster analysis methods, ecological security assessment grade in the research area can be divided into five levels: the area of very security(Ⅰ), relative security area(Ⅱ), critical security area(Ⅲ), relative insecurity area(Ⅳ), very insecurity area(Ⅴ). From 2004 to 2014, the land ecological composite index showed the increasing trend, but the ESI index was still less than 0.1 and showed critical security state. The area of very security towns increased from four to five， relative security villages increased from ten to eleven， critical security towns decreased from thirteen to twelve， relative insecurity town decreased from five to four， very insecurity towns decreased from eight to seven with respect to the evaluation results to analyze its dynamic evolution mechanism. The study results may provide the data support and basis for choosing the ecological immigration sites and ecological environment protection in Ningxia.

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