[Bldg-sim] Leaf area index values for roof vegetation

Pedro Peixeiro ppeixeiro at lnec.pt
Thu May 12 03:31:33 PDT 2011


Sotiris asked the same question in Eplus mailing list, and someone 
posted this link. I'll just post it here as well to share it with the rest.

http://daac.ornl.gov/VEGETATION/LAI_support_images.html#table

Pedro.



On 11-05-2011 19:55, Tabares Velasco, Paulo Cesar wrote:
>
> Hi Cheney,
>
> Happy to hear you also worked on this area. We were working on green 
> roofs, but perhaps not same research methodology/ scope. I am not 
> doing green roof at this time but I did it couple of years ago while I 
> was doing my PhD at PennState working under supervision of Dr. Jelena 
> Srebric and did all my experimental work inside an full-scale 
> environmental chamber. In that way I was able to control environmental 
> conditions such as radiation, air temp/RH/speed. Moreover, I measured 
> simultaneously conduction, radiation (short and long wave), convection 
> and evapotranspiration, as well as water content of substrate, LAI, 
> plants and substrate temperature.  It was a very detailed work 
> probably beyond the scope of Sotiris' initial question and I had to 
> design and built a new apparatus to measure all these heat fluxes.  I 
> would be glad to talk more in detail, but perhaps we are going little 
> bit beyond the scope of this mail list.
>
> So our studies might be similar but not precisely the same. We wanted 
> to have a fully validated green roof model (based on physics 
> principles), and back on those days we could not find the type/quality 
> of experimental data to do this job so we produced this 
> laboratory-grade data.
>
> Greetings!
>
> Paulo
>
> *From:*Cheney [mailto:chenyu73 at gmail.com]
> *Sent:* Wednesday, May 11, 2011 12:25 PM
> *To:* Tabares Velasco, Paulo Cesar
> *Cc:* Sotiris Papantoniou; bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] Leaf area index values for roof vegetation
>
> Wow, you are doing exactly same research as I did before! ;)
>
> Regards,
>
> Cheney
>
> LinkedIN @ http://ca.linkedin.com/pub/yu-cheney-chen/27/637/72b
>
>
>
> On Wed, May 11, 2011 at 11:21 AM, Tabares Velasco, Paulo Cesar 
> <Paulo.Tabares at nrel.gov <mailto:Paulo.Tabares at nrel.gov>> wrote:
>
> Sotiris,
>
> LAI values can range from 0(no plants) to 5 or higher. However, 
> typical LAI values for extensive green roofs (substrate/soil thickness 
> less than 6") are around 1--3. For my PhD Thesis at PennState I 
> measured among other things the LAI of a healthy green roof sample 
> with /Delosperma nubigenum/. The LAI was 2.7.
>
> Hope this helps,
>
> Paulo
>
> *Paulo Cesar Tabares-Velasco, Ph.D.*
>
> Postdoctoral Researcher
>
> Electricity, Resources & Building Systems Integration
>
> National Renewable Energy Lab
>
> 1617 Cole Blvd.  MS 5202
>
> Golden, CO  80401
>
> 303.384.7591 <tel:303.384.7591>  direct
>
> 303.384.7540 <tel:303.384.7540>  fax
>
> paulo.tabares at nrel.gov <mailto:paulo.tabares at nrel.gov>
>
> http://www.nrel.gov <http://www.nrel.gov/>
>
> *From:*bldg-sim-bounces at lists.onebuilding.org 
> <mailto:bldg-sim-bounces at lists.onebuilding.org> 
> [mailto:bldg-sim-bounces at lists.onebuilding.org 
> <mailto:bldg-sim-bounces at lists.onebuilding.org>] *On Behalf Of 
> *Sotiris Papantoniou
> *Sent:* Wednesday, May 11, 2011 11:06 AM
>
>
> *To:* bldg-sim at lists.onebuilding.org 
> <mailto:bldg-sim at lists.onebuilding.org>
> *Subject:* [Bldg-sim] Leaf area index values for roof vegetation
>
> Hello list,
>
> I am doing a research for green-roofs analyzed with energyplus. 
> Although I have searched the internet for default or average values 
> for LAI per plant or per group of plants, I had no luck.
>
> Can you please give me some guidance or some links about this value???
>
> Thank you in advance
>
> Sotiris Papantoniou
>
>
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