  We introduce a discretization/approximation scheme for reflected stochastic
partial differential equations driven by space-time white noise through systems
of reflecting stochastic differential equations. To establish the convergence
of the scheme, we study the existence and uniqueness of solutions of
Skorohod-type deterministic systems on time-dependent domains. We also need to
establish the convergence of an approximation scheme for deterministic
parabolic obstacle problems. Both are of independent interest on their own.
