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Arid Land Geography >

2022 , Vol. 45 >Issue 1: 164 - 175

DOI: https://doi.org/10.12118/j.issn.1000–6060.2021.127

Earth Surface Process

Comprehensive evaluation of land ecological quality in the Yellow River Basin based on Grid-GIS

  • Yong AO ,
  • Lingfeng JIANG ,
  • Zhaodi BAI ,
  • Xiao YANG ,
  • Leyi ZHANG
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  • 1. School of Land Engineering, Chang’an University, Xi’an 710054, Shaanxi, China
    2. Shaanxi Key Laboratory of Land Consolidation, Xi’an 710054, Shaanxi, China
    3. Shool of Earth Science and Resource, Chang’an University, Xi’an 710054, Shaanxi, China

Received date: 2021-03-17

  Revised date: 2021-06-24

  Online published: 2022-01-21

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Abstract

The Yellow River Basin plays a key role in China’s social and economic development and the construction of ecological security patterns. The high-quality development of this basin has become a major national strategy. Assessing the land ecological quality objectively and quantitatively is crucial for comprehensive land management and policymaking in Yellow River Basin. To understand the land ecological quality of Yellow River Basin and its spatial variation characteristics in 2018, four factors were chosen to construct a comprehensive evaluation model of the ecological quality of land: landscape pattern properties of land ecosystem, the anti-interference ability of habitat, ecosystem service value, and socioeconomic benefits. Improved entropy was used as an indicator of weight, and spatial autocorrelation, hot and cold spot analysis, and obstacle diagnosis model were used to explore the spatial characteristics of the land ecological quality. In this study, we take the landscape pattern properties of land ecosystem and ecosystem service value into consideration and use 8 km rasters as the evaluation unit to obtain more accurate results than the traditional administrative evaluation units. Results show the following: (1) The land ecological quality of Yellow River Basin is spatially expressed as “northwest low and middle part high, moderate in the southeast and northeast”. The overall land ecological quality is relatively low, and four safety grades from dangerous, critical safety, sub-safe, to safe accounted for 27.7%, 31.4%, 28.5%, and 12.4% of the total area, respectively. (2) The land ecological quality passed significant tests and showed a positive autocorrelation with a strong clustering pattern. The hot spots are mainly distributed in the Loess Plateau and Maowusu Ecological Reserve with strong ecological protection measures, and the cold spots are distributed in the northwest Yellow River Basin (the upper reaches), especially in southeast Qinghai, north Ningxia, and central Gansu. Therefore, the management of land ecology in the upper reaches should be properly strengthened to eliminate extreme cold points. (3) The main obstacles to the ecological quality of land in Yellow River Basin were economic density, diversity of land use structure, proximity to ecological protection area, and proximity to water. The government should focus on regional natural resources, encourage green innovation, convert rich natural resources, biological resources, historical and cultural resources into economic value, rationally allocate artificial ecosystems’ structure during ecological restoration and transformation, and add nature reserves when necessary.

Key words： Fragstats; Grid-GIS; land ecological quality; Yellow River Basin

Cite this article

Yong AO , Lingfeng JIANG , Zhaodi BAI , Xiao YANG , Leyi ZHANG . Comprehensive evaluation of land ecological quality in the Yellow River Basin based on Grid-GIS[J]. Arid Land Geography, 2022 , 45(1) : 164 -175 . DOI: 10.12118/j.issn.1000–6060.2021.127

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