Opps. I sent you the wrong file. Pl. use this. There's 3x times the Cl- in B. ***************************************** * Ranjan S. Muttiah * * Associate Professor * * Texas Agricultural Experiment Station * * 808 East Blackland Road * * Temple, Texas 76502 * * Tel: 254-774-6103 * * Fax: 254-770-6561 * * email: muttiah@xxxxxxxxxxxxx * ***************************************** -----Original Message----- From: David L Parkhurst [mailto:dlpark@xxxxxxxx] Sent: Wednesday, July 10, 2002 11:09 AM To: muttiah@xxxxxxxxxxxxx In-Reply-To: <NFBBJFDDBBBCHIDBODCJEEJCCMAA.muttiah@xxxxxxxxxxxxx> Subject: RE: SOlution Fractions > The measurements are on A (Sumner,NM) and downstream of A at B (Acme, NM) on the Pecos. I put in all the anion/cation measurements at A and B and get -200.2 for H2O mole transfer (see attached for input file). Attached input file has similar analyses for solutions 1 and 2. If there has been significant evaporation, I would expect to see higher chloride downstream (~5 times greater). Looks more like loss of water by seepage to the ground-water system than evaporation. > Looking at the stream flow record, there's 80 cfs at A and 15 cfs at B on the days of measurement. I'm assuming that the difference has been lost to evaporation and channel loss. The mixing ratio gives soln1:2 of 4.6:1 from the model. When I run it, I get 1.0 mixing fraction? > Should I take this to mean that the model estimates that 3.6 kg (= 200.2/55.5) of water was lost at B for every kg of water @ A due to evaporation ? (the recorded stream flow loss gives 80/15 = 5.7). How should I interpret the 4.6 ratio ? It means that 4.6 L of water at A is evaporated to leave 1 L of water at B. The difference is approximately 3.6 L of water ~ 3.6 kg water ~ 200 moles of water that has evaporated, which is the mole transfer of H2O(g). I don't see this when I run your model, but if there is no significant channel seepage the model would be describing the evaporation process. In this case, the 4.6:1 should be similar to the flow ratios 5.7:1. David David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225 Project web page: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled
Attachment:
Pecos_SumnerAcmeSep1979.pqi
Description: Binary data
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