摘要
ADCP全称为声学多普勒剖面流速仪(AcousticDopplerCurrentProfiler),是一种根据声学多普勒频移效应用矢量合成方法测量水流速度剖面的仪器,ADCP可测出水流流速矢量的东向、北向和垂向分量,为工程项目的河道数学模型和物理模型提供原始三维流态数据,为河势分析、河道冲淤计算、河道演变分析提供资料,由于天然河道水流特性及ADCP测流原理导致在测量中仍存在一些问题,如底沙运动、流速脉动、外界磁场影响等,因此探索ADCP与GPS的应用问题及对策来完成内河河道流态测量具有十分重要的意义。
The raw water velocity data is a fundament for us to investigate channel evolution based on numerical model and physical methodology. The velocity instrument, Acoustic Doppler Current Profiler (ADCP) has an advantage of three vectors in river, however, the limitation of the principle of ADCP and the complex water flow will bring many errors for the observational data. This study is focus on combining Global Positioning System (GPS) and ADCP techniques to survey the three dimensional raw velocity data in inner river and reduce the effects of sediment movement in near bed, velocity turbulence and magnetic field for flow characteristics. The combination techniques of ADCP and GPS show that this methodology is very satisfactory in practice.
出处
《地理空间信息》
2004年第5期42-44,共3页
Geospatial Information
关键词
ADCP
GPS
内河流态
流速脉动
外界磁场
ADCP
GPS
Flowpattern of inner river
velocity turbulence
magnetic field
