[Acoustics] ADCP meas. and EDI points

[Koschik, John A LRE]

John,

The software that I referenced in my posting yesterday is meant to be an
office tool.  However, it could be run in the field.  Two of the outputs
given for each ensemble are the position in latitude/longitude and the total
discharge (measured plus estimated) through that ensemble.  I'm not sure
whether it would be useful in the EDI situations you describe; send an email
if you want to pursue it.


John


-----Original Message-----
From: acoustics-bounces at simon.er.usgs.gov
[mailto:acoustics-bounces at simon.er.usgs.gov]On Behalf Of John Fenwick
Sent: Tuesday, February 07, 2006 9:41 PM
To: Robert G Legare
Cc: j.porteous at niwa.co.nz; acoustics at simon.er.usgs.gov
Subject: Re: [Acoustics] ADCP meas. and EDI points


Hi Robert,

I was just asked a similar question by one of our staff who needs to 
calculate EDI points for sediment gaugings.

However he proposed an answer that will probably be quicker and 
accurate enough in a flood situation.  He is planning to do an ADCP 
moving boat gauging to get the total discharge, then dividing that by 
say 6, and then starting the transect across till WinRiver shows Q/6, 
sampling there, moving out to 2 * Q/6 and taking the second sample, 
etc.

Did you get any other answers to your question, as I'd be interested to 
know the best way.

Does John Koschik's post (8 Feb) provide an answer? Once in Excel, 
the EDI would be easy to work out.   

For the job above, we will have no tagline or bridge for reference, so 
will have to use that method - unless anyone has a better idea?

Regards,

John

> Is any one using ADCP measurements to determine Equal-Discharge
> Increments (EDI) points in reference to cableway or bridge stationing
> locations? If so, would you be willing to provide the procedure taken
> to obtained the EDI points in reference to stationing locations.
> 
> I have developed a long hand approach of getting  EDI points from ADCP
> measurements in reference to cableway stationing. However, I was
> wondering if there is a script to aid in this process or if one could
> be developed?
> 
> 
> Any information would be greatly appreciated. 
> 
> 
> Robert Legare
> USGS, Montana Water Science Center
> USGS Hydrologic Technician
> Office 406.526.3532
> Cell  406.390.1306
> Fax 406.526.3651

- -
John Fenwick
NIWA
P O Box 8602
Christchurch
New Zealand

Ph 64 3 343 7864
Fax 64 3 348 5548


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