Population growth and agricultural intensification lead to stress on landscapes that are highly sensitive to land-use changes. An increase in irrigation-triggered landslides (ITL) in dry climates has negative impacts on local communities. However, evolution and global impacts of ITL are little-known. Here, we use Multi-Temporal Interferometric Synthetic Aperture Radar (MT-InSAR), vectorization, and differential method to study surface deformation, ground displacement, and changes in headscarp morphology and topography in regions prone to ITL, aiming to uncover the evolution and spatiotemporal distribution of ITL. Findings show that the most severe surface deformation of ITL occurs on the landslide body. Meanwhile, the ITL displacement curve indicates the ITL will maintain continuous movement for at least 7 years, while ancient ITL also poses a threat. Moreover, the headscarp of ITL shows lateral expansion and longitudinal retrogression on the horizontal ground, whereby the scale of expansion is greater than that of retrogression, which transforms landslides into landslide clusters. Finally, the topographic changes further reveal that the main development pattern of ITL is lateral expansion. We suggest that the frequency and disaster-causing ability of ITL will increase greatly with further population growth and related intensification in the agricultural sector.

中文翻译：

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三大洲沙漠集约化农业导致灌溉引发的山体滑坡活动增加


人口增长和农业集约化导致对土地利用变化高度敏感的景观的压力。在干燥气候下，灌溉引发的山体滑坡 （ITL） 的增加会对当地社区产生负面影响。然而，ITL 的演变和全球影响鲜为人知。本文采用多时相干涉合成孔径雷达 （MT-InSAR）、矢量化和差分方法研究了易受 ITL 影响的区域的地表变形、地面位移以及头状形态和地形的变化，旨在揭示 ITL 的演变和时空分布。结果表明，ITL 最严重的表面变形发生在滑坡体上。同时，ITL 位移曲线表明 ITL 将保持至少 7 年的连续运动，而古老的 ITL 也构成威胁。此外，ITL 的头巾在水平地面上表现出横向扩展和纵向倒退，其中扩展的规模大于回退的规模，从而将滑坡转变为滑坡群。最后，地形变化进一步揭示了ITL的主要发展模式是横向扩展。我们认为，随着人口的进一步增长和农业部门的相关集约化，ITL 的频率和致灾能力将大大增加。