[1]GE Ruxiang,MA Chao.Analysis on Land Use Change and Driving Factors of Lake Wetland in Arid Plateau[J].Research of Soil and Water Conservation,2022,29(01):376-385.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 01
Page number:
376-385
Column:
Public date:
2022-02-20
- Title:
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Analysis on Land Use Change and Driving Factors of Lake Wetland in Arid Plateau
- Author(s):
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GE Ruxiang1, MA Chao1,2
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(1.School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, China; 2.Key Laboratory of Spatio-temporal Information and Ecological Restoration of MNR, Henan Polytechnic University, Jiaozuo, Henan 454003, China)
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- Keywords:
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Ordos Plateau; Bojianghaizi wetland; land use and cover change(LUCC); land use conversion matrix; Sankey diagram
- CLC:
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TP79
- DOI:
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- Abstract:
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The study on land use/cover changes and ecological trend of lake wetland in Ordos Plateau can provide scientific basis and decision support for resource management, environmental protection and ecological planning in arid areas. Based on the series of Landsat satellite images and climate data, 16 scenes from 1986 to 2019 were captured and classified by the support vector machine(SVM)supervised classification method. Through change detection and overlay analysis, the land use conversion matrix and spatial change of each land use type were obtained, and the quantity of land use and the characteristics of spatial conversion in different periods were quantitatively described. The results show that:(1)bare land, low-coverage grassland and high-coverage grassland, accounting for 93%~99% of the whole study area, were the dominant land use types in the basin during the study period; the proportions of water body, built-up land and forest land were very small, which were about 1%, 1% and 2%, respectively;(2)during the past 34 years, great changes had taken place in the land use situation including the reduction of bare land, water body, and the increase of low-coverage grassland, high-coverage grassland, woodland, built-up land; the increase of the construction land was the largest, the construction land increased by 44.3 times;(3)the conversion of land types in the study area mainly occurred among bare land, low-coverage grassland and high-coverage grassland; bare land which in total reduced 31.79%was mainly converted into and out of low-coverage grassland, and the overall outgoing rate was higher than incoming; the low-coverage grassland was converted into high-coverage grassland, which increased the proportion of high coverage grassland from 14.63% to 35.98%;(4)jointly influenced by climate change and human activities, the land use in the study area had changed dramatically, and the impact of human activities was dominant.