Dear Mahrez,

I suggest you the following interesting links.

http://www.sciencedirect.com/science/article/pii/S1877343512000292

http://link.springer.com/article/10.1023%2FA%3A1005864605382

https://www.researchgate.net/publication/261293411_Source_transport_and_fluxes_of_Amazon_River_particulate_organic_carbon_Insights_from_river_sediment_depth-profiles

With my best regards

Prof. Bachir ACHOUR

Article Source, transport and fluxes of Amazon River particulate org...

I know of one paper, possibly unpublished by Coweeta Hydrologic Station and Univ of Ga scientists on a few small mountain streams in Georgia.  I have a digital copy in my computer - I am on iPad.  I thought their work was very informative, interesting in separating organic and inorganic carbon relative to storms, etc., and comparing about 4 streams, primarily in Chattooga River watershed area.  If you want this, respond and I will try to find it for you on my computer.  Even if unpublished, Please reference it as best as you can if you use it.  

Thank you very much Prof Bachir ACHOUR, These articles that you gave me,

  are very intéréssant for my study. Best regards

Thank you William F. Hansen. With great pleasure to send me the article, it really suits my study. Yes I will reference the article. thank you very much. 

Best regards

Mahrez SADAOUI 

I found the paper and will attach.  Hope it is something beneficial to you.  It discusses the discharge effects on TSS and then divides the inorganic portion from organic, but possibly the organic is the TOC and the inorganic is the other contributors to TSS.  I am pretty sure regardless you will find it interesting.

thank you  so much William F. Hansen for this article. I will read it in detail

here is an recent paper that you may find of interest:

Article Global carbon export from the terrestrial biosphere controll...

Thank you Valier Galy, This article is very interesting