Runoff and percolation flow meter

[Camilo L. T. Andrade]

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Dear members,
  
I would like to know if someone else has experience on automatically
measuring runoff flow from erosion parcels. We are currently collecting the
volume daily and manually measuring it. Of course the water comes dirty
with soil and maybe some debris and not all flow meter would work on this
situation. In addition any ideas to automatically measure percolation,
which is in our case a small flow rate.
  
Regards,
  
Camilo L. T. Andrade
Embrapa Maize and Sorghum
Rod. MG 424, Km 65, P.O. Box 151
35701-970 - Sete Lagoas, MG
Brazil
Tel +55 31 3779 1235
Fax +55 31 3779 1088