|Nighthawk - a subsurface biogeochemistry simulator
Nighthawk simulates the fate and transport of biogeochemically reactive contaminants in the
saturated subsurface. Nighthawk utilizes a fully-kinetic operator-splitting technique to
solve the one-dimensional advective-dispersive-reactive (ADR) equation.
biogeochemical processes include:
- Monod-type biodegradation kinetics
- General zero- and first-order kinetics
- Aqueous-phase equilibrium speciation
- Mineral-phase equilibirum speciation (precipitation/dissolution of minerals)
- Competitive ion exchange
- Surface Complexation
- Linear and non-linear isotherms, representing equilibrium or non-equilibrium sorption.
Supported boundary conditions include:
- Dirichlet (constant concentration)
- Neumann (constant dispersive flux)
- Danckwerts (flux transition)
Nighthawk executables for Linux (32- and 64-bit) and Windows, and example input files are provided in
the self-extracting executable below, along with the manual.