Assessment of ecological geological vulnerability in Mu Us Sandy Land based on GIS and suggestions of ecological protection and restoration

IF 4.6 3区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
China Geology Pub Date : 2025-01-25 DOI:10.31035/cg20230027
Jian-yu Liu , Hong-feng Nie , Liang Xu , Chun-lei Xiao , Wei Li , Guo-li Yuan , Yan-peng Huang , Xin-yang Ji , Tian-qi Li
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引用次数: 0

Abstract

Eco-geological vulnerability assessment is a significant research topic within the field of eco-geology, but it remains poorly studied. The Mu Us Sandy Land, located in the central part of the farming-pastoral ecotone in northern China, plays a critical role in maintaining the ecological security pattern in this region. However, this sandy land also faces severe sandy desertification and ecological degradation. This study conducted a regional eco-geological vulnerability assessment of the Mu Us Sandy Land using a comprehensive index evaluation method based on eco-geological theories and survey results. To construct an appropriate index system for the eco-geological vulnerability assessment of the Mu Us Sandy Land, the study considered the sandy land's unique characteristics and identified 15 factors of five categories, namely geology, meteorology, soil, topography, and vegetation. The paper calculated the comprehensive weights of all the indices using the analytic hierarchy process (AHP) and the entropy weight method (EWM). Furthermore, it established the eco-geological vulnerability index (EGVI) and obtained the assessment results. The results showed that the eco-geological vulnerability of the Mu Us Sandy Land gradually intensifies from east to west, manifested as vulnerable eco-geological conditions overall. Specifically, extremely vulnerable zones are found in the northwestern and southeastern parts of the study area, highly vulnerable zones in the western and southern parts, moderately vulnerable zones in the central part, and slightly and potentially vulnerable zones in the eastern and southern parts. Areas with high spatial autocorrelations include the northern Uxin Banner - Otog Banner - Angsu Town area, the surrounding areas of Hongdunjie Town in the southeastern part of the study area, the Hongshiqiao Township - Xiaohaotu Township area, Otog Front Banner, and Bainijing Town, which should be prioritized in the ecological conservation and restoration. Additionally, the paper proposed suggestions for the ecological conservation and restoration of county-level administrative areas in the study area. Overall, the findings provide a valuable reference for the ecological conservation and restoration of the Mu Us Sandy Land and other desert areas in arid and semi-arid regions.
基于GIS的毛乌素沙地生态地质脆弱性评价及生态保护与修复建议
生态地质脆弱性评价是生态地质领域的一个重要研究课题,但目前研究较少。毛乌素沙地位于中国北方农牧交错带的中部,对维持该地区的生态安全格局起着至关重要的作用。然而,这片沙地也面临着严重的沙化和生态退化。基于生态地质理论和调查结果,采用综合指数评价法对毛乌素沙地进行了区域生态地质脆弱性评价。为构建适合毛乌素沙地生态地质脆弱性评价的指标体系,结合毛乌素沙地自身特点,确定了毛乌素沙地地质、气象、土壤、地形、植被5大类15个因子。本文采用层次分析法和熵权法计算了各指标的综合权重。建立了生态地质脆弱性指数(EGVI),获得了评价结果。结果表明:毛乌素沙地生态地质脆弱性自东向西逐渐加剧,总体上表现为脆弱的生态地质状况;研究区西北部和东南部为极度脆弱区,西部和南部为高度脆弱区,中部为中度脆弱区,东部和南部为轻度和潜在脆弱区。空间自相关性较高的区域包括研究区东南部乌新旗北部—奥托格旗—安苏镇区域、洪敦街镇周边区域、洪石桥乡—小壕土乡区域、奥托格前旗、白坭京镇等,应优先进行生态保护与修复。并对研究区县级行政区域的生态保护与修复提出了建议。研究结果为干旱半干旱区毛乌素沙地等荒漠地区的生态保护与恢复提供了有价值的参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
China Geology
China Geology GEOLOGY-
CiteScore
7.80
自引率
11.10%
发文量
275
审稿时长
16 weeks
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