2000—2020年博尔塔拉蒙古自治州沙漠化风险评价
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X826

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国家自然科学基金“基于格网GIS技术的艾丁湖流域生态风险评估及调控机制研究”(41861046);2021“三区人才”项目(2221-LYE1)


Desertification Risk Assessment for Bortala Mongolian Autonomous Prefecture During 2000-2020
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    [目的] 对2000—2020年博尔塔拉蒙古自治州沙漠化风险的时空变化特征进行分析,为该区生态修复、因地制宜制定防沙治沙措施提供科学依据。[方法] 选取9个自然和社会经济指标构建沙漠化风险评价指标体系,在ENVI和ArcGIS软件的支持下,对2000—2020年博尔塔拉蒙古自治州沙漠化风险进行评价,并分析风险等级时空变化特征。[结果] ①2000—2020年博州沙漠化风险呈现较强的空间异质性。极高风险和高度风险区集中在博州东部精河县及东北部阿拉山口市;中度风险及低风险区域位于博州中部博乐市及温泉县,中度风险所占比例最大,高达40%以上。②2000—2020年沙漠化风险主要是以极高风险向高度风险转移,高度风险向中度风险转移,中度风险向低风险转移,整体呈现出逆向逐级转化的趋势。至2020年,极高风险面积共减少3 160.3 km2,低风险面积共增加2 424.76 km2。③2000—2020年,沙漠化极高风险和高度风险重心均向东迁移,极高风险重心迁移变化最为明显,逐渐向精河县东部迁移,中度风险和低风险重心变化范围不明显,分布于博乐市和温泉县。[结论] 2000—2020年,博尔塔拉蒙古自治州各区域沙漠化风险程度不同,在沙漠化的治理与防治过程中,应当因地适宜,合理有效地开展治沙防沙以及生态修复工程。

    Abstract:

    [Objective] The temporal and spatial characteristics of desertification risk were analyzed for the Bortala Mongolian Autonomous Prefecture in order to provide a scientific basis and data support for ecological restoration, including formulation of sand prevention and control measures.[Methods] A desertification risk evaluation index system that included nine natural and socio-economic indicators was constructed by using ENVI and ArcGIS software to evaluate the risk of desertification. The characteristics of temporal and spatial changes were analyzed for the Bortala Mongolian Autonomous Prefecture from 2000 to 2020.[Results] ① The risk of desertification showed strong spatial heterogeneity in the Bortala Mongolian Autonomous Prefecture during 2000-2020. The extremely high risk and high risk areas were concentrated in Jinghe County and Alashankou City, located in the east of the Bortala Mongolian Autonomous Prefecture. The moderate risk and low risk areas were located in Bole City and Wenquan County in the central part of the Bortala Mongolian Autonomous Prefecture. The moderate risk level constituted the largest proportion of the total area (more than 40%). ② From 2000 to 2020, the risk of desertification shifted from extremely high risk to high risk, from high risk to moderate risk, and from moderate risk to low risk, showing a declining trend in risk of desertification. The extremely high risk area decreased by 3 160.3 km2, and the low risk area increased by 2 424.76 km2 by 2020. ③ From 2000 to 2020, the extremely high risk and the high risk centers of desertification moved eastward. The shift of the extremely high risk center was the most obvious, gradually moving to the east of Jinghe County. The medium risk and low risk centers did not change significantly, and they were located in Bole City and Wenquan County.[Conclusion] During 2000-2020, the desertification risk level was different in each area of the study area. Therefore, in order to prevent and control desertification, ecological restoration projects should be carried out reasonably and effectively according to local conditions.

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刘燕燕,孙桂丽,吉小敏,禹明柱,冉亚军.2000—2020年博尔塔拉蒙古自治州沙漠化风险评价[J].水土保持通报,2022,42(3):66-73

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  • 收稿日期:2021-11-05
  • 最后修改日期:2021-12-08
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  • 在线发布日期: 2022-08-02
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