SFT mass loading boundary

[jtwhite79]

Hey guys - I'm working nitrate transport model and I need a way to "inject" some nitrate directly into the SFR network - there are point sources of nitrate and we have estimates of the load (mass per time) for these locations along the SFR network. Is there anyway to get this done given the current version of SFT? I saw some options for specified concentration, but nothing like an itype 15. Any suggestions? I guess I could "fake" an sfr runoff and scale the concentration to get the desired mass, but I'm hoping for something cleaner...Thanks!

[rniswon]

Hi Jeremy,

Whatever the point source is, it must have some water that goes with it. I would add water using an inflow segment with a concentration representing the point source.

Best, Rich

-- Richard Niswonger Earth Systems Modeling Branch Integrated Modeling and Prediction Division Water Mission Area, U.S. Geological Survey 345 Middlefield Road Mail Stop 470 Menlo Park, CA 94025 [email protected] office: 831 661 6072 cell: 775 297 1392 https://www.usgs.gov/staff-profiles/Richard-G-Niswonger

On Mon, Mar 5, 2018 at 6:36 PM, jtwhite79 [email protected] wrote:

Hey guys - I'm working nitrate transport model and I need a way to "inject" some nitrate directly into the SFR network - there are point sources of nitrate and we have estimates of the load (mass per time) for these locations along the SFR network. Is there anyway to get this done given the current version of SFT? I saw some options for specified concentration, but nothing like an itype 15. Any suggestions? I guess I could "fake" an sfr runoff and scale the concentration to get the desired mass, but I'm hoping for something cleaner...Thanks!

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[jtwhite79]

Thanks Rich - that's what I saw in the input instructions. I was hoping for an equivalent to the SSM's mass loading boundary type. But otherwise, I resort to adding a specified inflow and scaling the concentration accordingly.