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长距离输水管线是水资源调配工程的重要组成部分,对实现我国水资源合理配置具有重要作用。掌握输水管线沿线周边的地表形变状况,对保障输水工程的安全运营至关重要。利用时序合成孔径雷达干涉测量技术可以快速地获取输水管线沿线的大范围地表形变信息,为及时发现潜在的地面沉降等地质灾害潜在隐患提供可靠的线索。因此,利用基于自然年的时间子集时序InSAR方法对哨兵1号数据进行处理,获取了珠江三角洲水资源配置工程B2标段沿线2021年与2022年的地表形变,通过分析2a期间B2标段沿线地表形变,发现在2021—2022年期间,B2标段沿线出现6处地表形变加剧的区域,将对输水管线的安全施工及运营产生潜在的地质风险。
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