Compensatory Value

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hdelaconcha
Posts: 50
Joined: Mon Jul 11, 2016 8:10 pm
Location: Mexico
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Compensatory Value

Post by hdelaconcha » Fri Feb 10, 2017 2:24 pm

This is more an academic question rather than directly an i-tree, however it is related. I am doing a compilation of i-tree reports in different cities for my workshop and found something hard to believe, here is the table I have been constructing:
CIUDAD arboles de arboles Valor USM Benef Anual
London, UK 14.00 8,421,000 $61,880 $165.80
Austin, TX 30.80 33,800,000 $16,000 $38.20
Philadelphia, US 20.00 2,918,000 $1,750 $9.56
Plano, TX 16.40 1,690,000 $1,625 $5.30
Milwaukee, WI 21.60 3,377,000 $1,439 $3.80
El Paso, TX 5.10 1,281,000 $1,020 $3.00

the thing is that the Compensatory Value for AUSTIN, TX is way of the chart, compared to other cities. Is this correct?
Thanks
Horacio de la Concha
AGRINET SA de CV
Cuernavaca MEXICO
hdelaconcha@agrinet.com.mx
Jason.Henning
i-Tree Team
Posts: 174
Joined: Fri Dec 21, 2012 7:45 am

Re: Compensatory Value

Post by Jason.Henning » Fri Feb 10, 2017 3:29 pm

Hi Horacio,
Can you post links to a few of those reports, including Austin? I'd be curious to look at their methods a little before making a guess about the differences.
-Jason
A member of the i-Tree Team
hdelaconcha
Posts: 50
Joined: Mon Jul 11, 2016 8:10 pm
Location: Mexico
Contact:

Re: Compensatory Value

Post by hdelaconcha » Sun Feb 12, 2017 7:26 pm

I downloaded all of the reports from the https://www.itreetools.org/resources/reports.php

the Ausitn Report is https://www.itreetools.org/resources/re ... report.pdf

and also there you can get the london, plano and the rest. Also for my workshop where is a reference for the price of C that is used in the i-Tree. I have not found a definite journal article mentioning where the 146.6 $/t price comes from.

Gracias
Horacio de la Concha
AGRINET SA de CV
Cuernavaca MEXICO
hdelaconcha@agrinet.com.mx
Jason.Henning
i-Tree Team
Posts: 174
Joined: Fri Dec 21, 2012 7:45 am

Re: Compensatory Value

Post by Jason.Henning » Tue Feb 21, 2017 12:28 pm

The Austin numbers are high mostly duethe very high number of trees in that city. The high number of trees results from the large foot print of the city (the largest on that list) and the fact that the city's boundary includes about 30% closed canopy natural forest by area. This leads to a much higher number of trees and a much higher density of trees in Austin than anywhere else in that list. On a per tree basis the compensatory value for Austin is comparable to the other cities in the list it is just that Austin has a lot more trees.

As for the carbon value number please see the update in this forum thread, https://forums.itreetools.org/viewtopic ... rbon#p2195.

Thanks,
Jason
A member of the i-Tree Team
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