Water and solute mass balance error

A discussion forum for users of the new HYDRUS 2D/3D. HYDRUS is a software package for simulating water, heat and solute movement in two- and three-dimensional variably saturated media. Happy Posting!
Post Reply
prathimab
Posts: 2
Joined: Thu Feb 13, 2020 8:28 am
Location: India

Water and solute mass balance error

Post by prathimab » Sat Mar 14, 2020 2:34 pm

Dear sir,

I am trying to simulate migration of zinc in contaminated soil considering atmospheric boundary condition. I have used rainfall data for Atmospheric BC.
But in results I am getting total and relative mass balance as mentioned below:
WatBalT [V] -0.19077E+02
WatBalR [%] 0.132
CncBalT [VM/L3] -0.12943E+02
CncBalR [%] 1.410

Please guide me to rectify this problem.

Regards,
Prathima

Jirka
Posts: 4922
Joined: Sat Mar 16, 2002 3:47 pm
Location: USA
Location: Riverside, CA

Re: Water and solute mass balance error

Post by Jirka » Sat Mar 14, 2020 2:58 pm

I think that these are acceptable mass balance errors. I usually want from the simulation to have the mass balance error for water flow less than 1% (which you have almost 10 times smaller) and for solute transport less than 2-3% (which you also have). You can likely lower the mass balance errors even lower by adapting finer spatial discretization or using more strict iteration criteria (but there is no guarantee of that, because of the nonlinearity of the problem). J.

prathimab
Posts: 2
Joined: Thu Feb 13, 2020 8:28 am
Location: India

Re: Water and solute mass balance error

Post by prathimab » Sat Mar 14, 2020 3:45 pm

Thank you very much sir.,

Prathima

Post Reply