Dear Saly,
No. Water model has non-bonded and bonded potentials : non-bonded = LJ (van der waals) & coul. , bonded = bonding (stretch) and bend angle.
Since water molecule is rigid in shape, hence shake algorithm must be applied to the water model. Therefore, the spring constants k in both bond and angle harmonic terms are insignificance.
I strongly suggest you to find a good MD textbook or literature to read before you start any MD simulation. If not, you are actually wasting your time and resources.
Regards,
Christopher