基于InSAR的陕西省地质灾害适宜性评价与精准区划研究

IF 3.2 3区地球科学 Q2 ASTRONOMY & ASTROPHYSICS

Advances in Space Research Pub Date : 2026-07-15 Epub Date: 2026-04-28 DOI:10.1016/j.asr.2026.04.082

Jingtao Li, Jing Zhang, Shuangcheng Zhang, Ning Liu, Shuai Gao, Zhen Li, Zhijie Feng, Sijiezi Li

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引用次数: 0

摘要

目前，合成孔径雷达干涉测量技术（InSAR）已成为地质灾害监测的主要手段，但在省级监测中会产生不同程度的几何畸变。InSAR的适宜性评价对其观测质量具有重要意义。本文以陕西省为例，提出了基于连续入射角的最大可探测变形梯度（MDDG）计算方法，进行了InSAR适宜性评价，得到了分辨率为90 m的高、中、低、极低4类适宜性结果。同时，构建了基于高程变异系数、地质岩性、InSAR适宜性和高程因子的地理边界方法。结果表明：(1)受地表类型的影响，陕西省不同区域对InSAR适宜性的响应程度存在显著差异。高、中、低、极低适宜度比例分别为27.1%、13.3%、13.5%、46.1%；(2)陕西省三种地貌单元类型明显，0.5等值线附近为关中盆地与周边高原/山地的宏观构造地貌界线。北界以渭北黄土塬与北山山系组成的过渡带为界，南界以秦岭北麓断裂带为界；(3)连续入射角插值成图方法具有较高的空间连续性，不同入射角之间存在显著的系统差异。在每条IW条中，检测能力从近端到远端逐渐降低，MDDG系统下降13.1%，每度变化率约为1.302% /°。该方法可为省级InSAR适宜性评价和地理精确区划提供一定的参考价值和范本。

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Research on the suitability assessment and geo-precision zoning of geological disasters in Shaanxi Province based on InSAR

At present, synthetic aperture radar interferometry (InSAR) has become the main means of geological disaster monitoring, but it will produce different degrees of geometric distortion in provincial monitoring. InSAR suitability evaluation is of great significance to its observation quality. Taking Shaanxi Province as an example, this paper proposes a maximum detectable deformation gradient (MDDG) calculation method based on continuous incident angle, carries out InSAR suitability evaluation, and obtains four types of suitability results: high, medium, low, and very low with a resolution of 90 m. At the same time, a geographical boundary method based on elevation variation coefficient, geological lithology, InSAR suitability, and elevation factor is constructed. The results show that: (1) Affected by the surface type, the response degree of different regions in Shaanxi Province to InSAR suitability is significantly different. The proportion of high, medium, low and very low suitability is 27.1%, 13.3%, 13.5% and 46.1% respectively; (2) The three types of geomorphic units in Shaanxi Province are distinct, and the vicinity of the 0.5 isoline is the macro-tectonic-geomorphological boundary between the Guanzhong Basin and the surrounding plateau/mountain. The northern boundary is bounded by the transitional belt area composed of Weibei loess tableland and Beishan mountain system, and the southern boundary is bounded by the northern foot fault zone of Qinling Mountains; (3) The continuous incidence angle interpolation mapping method has higher spatial continuity and significant systematic differences between different incidence angles. In each IW strip, the detection ability gradually decreases from the near end to the far end, and the MDDG system decreases by 13.1%, and the rate of change per degree is about 1.302% / °. This method can provide a certain reference value and paradigm for provincial InSAR suitability assessment and geo-precision zoning.

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来源期刊

Advances in Space Research 地学天文-地球科学综合

CiteScore

5.20

自引率

11.50%

发文量

800

审稿时长

5.8 months

期刊介绍： The COSPAR publication Advances in Space Research (ASR) is an open journal covering all areas of space research including: space studies of the Earth''s surface, meteorology, climate, the Earth-Moon system, planets and small bodies of the solar system, upper atmospheres, ionospheres and magnetospheres of the Earth and planets including reference atmospheres, space plasmas in the solar system, astrophysics from space, materials sciences in space, fundamental physics in space, space debris, space weather, Earth observations of space phenomena, etc. NB: Please note that manuscripts related to life sciences as related to space are no more accepted for submission to Advances in Space Research. Such manuscripts should now be submitted to the new COSPAR Journal Life Sciences in Space Research (LSSR). All submissions are reviewed by two scientists in the field. COSPAR is an interdisciplinary scientific organization concerned with the progress of space research on an international scale. Operating under the rules of ICSU, COSPAR ignores political considerations and considers all questions solely from the scientific viewpoint.