摘要
浅地层剖面调查是进行大陆架第四纪地质研究，浅海灾害地质研究和工程地质调查的重要手段，剖面的质量与解释精度将对研究成果的可靠性造成直接影响。由于浅地层剖面系统的震源与水听器有一定的距离，因此它只是近似的垂直发射垂直接收单道地震系统，当水深过浅时造成了剖面浅层的失真，导致各层位反射时间延迟，层与层之间双程走时缩短，计算出的层速度偏高，在地形起伏较大的区域，将造成地形失真，在潮差大的区域，还将造成剖面交点不能闭合，所以，当海水深度过浅时，应对剖面浅层进行校正。
Subbottom profiling is an important method of continental-shelf Quaternary geolo-gy,hazardous geology and engineering geology. The quality of a profile and the correct-ness interpretation can directly influence reliability of study results.The subbottom pro-file system is only a close-to single-track system that vertically emits and receives sig-nals,as there is some distance between hydrophone and seismic source.Too shallow wa-ter can lead to skewness of a profile due to delay of reflection time from horizons,short-ening of travelling time from one horizon to another,too big the interval velocity calcu-lated and rough relief.And meeting points of a profile cannot close if the profiling isdone in an area where tidal range is big. So,correction of subbottom profiles acquired atshallow sea water is very necessary.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1996年第1期111-116,共6页
Marine Geology & Quaternary Geology
