SPILL is a dynamic 1.5D water quality model derived from the USGS BLTM,
the Branched Lagrangian Transport Model for river reaches or networks.
SPILL is designed to represent water quality downstream of a release point such as an
industrial discharge, city and/or waster treatment plant,
or an accidental release or spill.
The model operates over hours to days, and covers up to a few hundred kilometers
of variable channel geometry in a simple, trapezoidal approximation) downstream
of a release point with a time variable release rate of a conservative or first-order
decaying pollutant. Dynamic graphical representation and "breakthrough" curves
at user selected location describe the evolution of the spill in time and space.
For more details, refer to the SPILL model manual page
or the on-line links to
SPILL model scenario, Jilin, Yangtze, PRC