台湾浊水溪冲积扇地表变形监测雷达干涉技术与资料融合方法

被引:4
作者
洪伟嘉
柳志锡
机构
[1] 台湾工业技术研究院绿能与环境研究所
关键词
地层下陷; 浊水溪冲积扇; 雷达干涉技术; 水准测量;
D O I
暂无
中图分类号
P641.7 [地下水普查与勘探];
学科分类号
0818 ; 081802 ;
摘要
浊水溪冲积扇为台湾目前最严重的地层下陷区,已设置包括DInSAR、GPS、水准测量、磁环分层式监测井与地下水位井等多元监测系统。大范围监测地层下陷方法中的水准测量有取样性不足之缺点,而DInSAR也易受相位不相关与大气误差影响而致精度降低。本研究利用2006~2008年期间共20幅ENVISAT卫星影像,搭配PSI技术,有效降低DInSAR的误差影响,同时获得107.6像素/km2的取样密度,弥补了水准测量取样密度仅0.2个/km2的取样性不足,透过295个监测点交叉验证,PSI与水准测量的成果显示两者的均方根误差为0.6cm。本研究亦发展了资料融合方法,有效结合水准测量与PSI成果,实验结果显示融合后的成果更能精确展现下陷的范围与下陷中心的变化,同时该成果与水准测量之均方根误差降至0.4cm。
引用
收藏
页码:47 / 53
页数:7
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