LiDAR Survey in Active Tectonics Studies:An Introduction and Overview
LiDAR Survey in Active Tectonics Studies:An Introduction and Overview
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发表时间：
2014
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通讯作者：
Ren Zhiku
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作者：
Ren Zhiku
活动断裂填图是活动构造研究的基础，传统的填图方法是通过遥感影像、航片解译和沿断裂沿着典型点的野外调查相结合的方法，但这些方法费时费力，而且只能获得部分典型点沿断裂沿着的形变模式，而不是沿着整个断层带。光测测距（LiDAR）测量可以直接测量裸露地表的高程，精度高，近年来，在美国、欧洲、日本乃至中国台湾省，沿着主要活动断层进行的LiDAR测量已得到广泛应用，在活动断层填图中，LiDAR技术在林业、城市等领域具有传统野外调查无法比拟的优势，高分辨率的LiDAR数据可以快速、准确、高精度地测量地震区的位移，利用LiDAR数据进行震前、震后差分可以有效地探测发震断层沿着的同震形变模式。介绍了LiDAR测量的主要优势和前景，指出在我国开展全国性的、沿沿着主要活动断裂的机载LiDAR测量势在必行，LiDAR数据将成为活动构造研究的主要数据源。
The active fault mapping is the basis of active tectonics studies.Traditionally,the mapping is conducted by combining of interpretations of remote sensing images and aerial photographs,and field survey at typical sites along the fault.However,these methods are time consuming,and could only obtain the deformation patter along the fault at some typical sites,not along the whole fault strand.The light detection and ranging(LiDAR)survey can directly measure the elevation of the bare ground surface with high precision,which could provide the highest resolution data for active fault mapping along the entire fault strand so far.Recently,LiDAR surveys along major active faults are widely conducted in American,Europe,and Japan,even in Taiwan province of China.In active fault mapping,LiDAR method has advantages over traditional field investigations especially in forestry and cities.Moreover,displacement measurements is efficient,accurate and of high precision based on high resolution LiDAR data;differencing pre-and post-earthquake LiDAR data is efficient in detecting co-seismic deformation pattern along the seismogenic faults.In this paper,we review the major researches of LiDAR surveys in active tectonics researches;and introduce the major advantages and prospect of LiDAR survey.In future,statewide airborne LiDAR survey along the major active faults will be imperative in China;hence,LiDAR data will be the major data source for active tectonics studies.