how to model COD (chemical oxygen demand) ?

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rcxy
Posts: 31
Joined: Fri Jul 02, 2010 1:28 pm
Location: Guangdong Ocean University

how to model COD (chemical oxygen demand) ?

#1 Post by rcxy » Mon Dec 06, 2010 1:05 am

how to model COD (chemical oxygen demand) ?
which tracer?
Thanks a lot !

cathyyangfeng
Posts: 24
Joined: Fri Aug 29, 2008 4:13 am
Location: Virginia Institute of Marine Sciences

Re: how to model COD (chemical oxygen demand) ?

#2 Post by cathyyangfeng » Tue Dec 07, 2010 2:22 am

I do not think a specific tracer is available for this type of requirements.

The Fennel Module has an oxygen component in. But it is a nitrogen-based model, and oxygen depends on the amount of nitrogen available.

What type of question you interested in?

rcxy
Posts: 31
Joined: Fri Jul 02, 2010 1:28 pm
Location: Guangdong Ocean University

Re: how to model COD (chemical oxygen demand) ?

#3 Post by rcxy » Wed Dec 08, 2010 3:30 am

Thank you very much !

Hi,I want to do pollutant model to study the environmental capacity.
1) i know roms can add a passive tracer (set the ' NPT = 1 ! Number of inactive passive tracers' and 'define T_PASSIVE' in the cpp file), I think the COD also can model by passice tracer ?.
2) If can, How to do add the decay rate in the passive tracer ?
3) And i want to do a model 'couple' the COD wtih NPZD (or EcoSIM, NEMURO ) model. How to do ?

Thanks a lot !

crowley
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Joined: Wed Mar 26, 2003 4:14 pm
Location: DOI/MMS

Re: how to model COD (chemical oxygen demand) ?

#4 Post by crowley » Thu Dec 09, 2010 5:43 pm

2) If can, How to do add the decay rate in the passive tracer ?
I don't believe that ROMS has this capability, but you can modify the code to do it. I once applied a simple exponential decay to some passive tracers. I think I added code to step3d_t.F.

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