Based on observed protype data of piezometer level in a long narrow mountain body used as a part of water-retaining structure, a statistical model and prognosis equation of piezometer level related with reservoir level, rainfall and time effect are found by determinate function method and physical inference method.

According to the observation data of piezometer level measured before reinforcement and the data of geological investigation, the seepage parameters of dam body and its foundation are obtained by use of the flexible tolerance metho.

In this paper, monitoring data of piezometric level, pore water pressure and seepage of main dam was analyzed, as well, dam safety was evaluated.

So capacitance water level measurement is put forward based on experiments,which is able to realize hig.

It analyzes the factors affecting the precision of water level measurement.

This paper introduces the key technology on high-precision tracking mode water level measuring system,which is the essential device of the flood prevention model on the Yangzi River.

The abnormal condition of the water level measuring equipment in the steam drum of No.

Based on "The 25 key requirements concerning preventing the grave accident for power production"and"The stipulations (try out) of disposition, installation and use for water level measuring system of boiler drum fa power plant fa State Power Corp.