DFF3D on a reservoir.

[Alysium]

When they draw a reservoir down, the water level is lower… didn’t have a problem last year. This year, it’s about 20’ below full pool, and it shows that on pbg. Where should i start looking?

 

[TheReaper]

I'm not sure what you're asking. Is it that the DFF3D is not allowing PBG to be generated? If so, is the depth below you, 20 feet?

 

[Alysium]

I read somewhere, on some channel, a while back, that somewhere in the circuitry it compensated for lower water levels in a reservoir. After a bit of reflection, I think it may have been disinformation. It seemed like last year, at this time of drawdown, the pbg compensated for the water level in the reservoir being lower by 20’. Maybe I was mistaken.

When I was out the other day, with the reservoir drawn down about 20’, the pbg rewrote my existing pbg with 20’ shallower depths. Which makes sense, since it’s 20’ less to the bottom.

pbg is taken between 20 and 400’.

Not sure if this helps explain my question?

Thanks for the reply.

 

[TheReaper]

I was just curious how deep the reservoir was. As long as the depth below the transducer is a minimum of 3 meters (no more than 300m), GPS and heading, and the PBG recording set to ON...it should be working.