  The spatial distribution of Cherenkov radiation from cascade showers
generated by muons in water has been measured with Cherenkov water calorimeter
(CWC) NEVOD. This result allowed to improve the techniques of treating cascade
showers with unknown axes by means of CWC response analysis. The techniques of
selecting the events with high energy cascade showers and reconstructing their
parameters are discussed. Preliminary results of measurements of the spectrum
of cascade showers in the energy range 100 GeV - 20 TeV generated by cosmic ray
muons at large zenith angles and their comparison with expectation are
presented.
