Hydraulic laboratory experiments including experiments with permafrost.
Description of the original method of measuring permafrost erosion in wave fiume.
Analysis of experimental data.
The modern wave laboratory of IBW was constructed in 1998-1999. As the environmental research unit for universities and institutes, it allows to perform both scientific and educational activities It creates also possibilities of research connected with maritime industry. The laboratory building is 70 m long, 5,5 m wide and 5,6 m high. The most important element of the laboratory is the wave flume. The geometry of the flume is very precise (the tolerance during construction stage was 0,5 mm). The flume is 64,1 m long, 0,6 m wide, and 1,4 m high.
The waves are generated by piston-type wavemaker driven by hydraulic system. The generation of regular and irregular waves is possible by a special program creating time series that can be executed by wavemaker. The accuracy of the wavemaker is controlled during research. There is a possibility of creating waves up to 0,6 m high. The length of wave (L) is related to period (T), which should not be smaller than 0,5 s. The wavemaker has separate foundation to avoid the vibrations of the flume.
There is a very precise equipment in the laboratory for performing a number of different measurements. It is possible to measure wave profiles, pressure, velocity and accelerations. The modern data receiving card can work at frequency of sampling up to 300 000 Hz.