Water parameters needed

[Yann Fulliquet <yannfulliquet@yahoo.fr>]

Hi Everyone!
 
I am looking for several water parameters and description of river's bottom.
I am searching for the information for the following rivers:
 
Rio Napo, Rio Nanay, RIo Atacuari, Rio Ucayali, Rio Pachitea, Rio Madeira, Rio Agarico, Rio Orreguaza, Rio Caquera, Rio Parnahyba, Rio Yavari, Rio Huytoyacu, Rio Cabriales, Rio Bobonaza, Rio Huallaga 

Any idea where I could find these informations , either on the net or in a book?!! 

In advance thanks!!!
Cheers
Yann



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