Carbon storage and sequestration model output

Science, Research & Data
1

Dear users of InVEST, Today I have successfully run the carbon storage and sequestration module. I have got some rasters which have only low and high values. By the symbology of ArcGIS, I couldn’t classify them. I want to know the details of handling of these rasters. Furthermore, I want to know how to interpret all the model outputs extensively. It is worth noting that I am from Bangladesh and involved in academic research. Looking forward to hearing from you. Danesh

2

Welcome to the forum @danesh -

What do you mean by "rasters which have only low and high values”? Are there only two values in the whole raster, the lowest and highest carbon storage, and no values at all in between? Or something different?

Can you post a map showing your symbology and raster value range? It might also be useful to post your carbon pool table, so we can get an idea of what should be expected from those inputs.

~ Stacie

3

Dear Stacie, Thanks for your prompt reply. The output rasters seem have only two values, low and high. For your kind consideration, I am uploading the carbon pool csv file and an output raster. Please see the output file. I wanted to classify it by using the symbology of the ArcGIS. But it did not work as I wanted. For example, an NDVI raster also primarily shows low and high values. But we can classify it by symbology. However, in this case I can’t. I hope your suggestions will be vital to me.

carbon_narsingdi.csv (167 Bytes)

c_storage_bas.tif (242.8 KB)

4

Thanks for sending that information @danesh . There are only two values in the raster output because of the four land use classes, all but one of them have carbon pool values of 0:

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image1293×781 51.4 KB

All the model does is add up these 4 carbon pool values for each land use class. So, according to this table, all pixels that are “Forest vegetation” will have an output storage value of 90.26 (which is the sum of all 4 carbon pool values), and all other pixels will have a value of zero, which is what we’re seeing in the c_storage_bas.tif output raster.

~ Stacie

5

Thanks Stacie for your nice clarification. Can you please suggest a scientific paper that has clearly and extensively interpreted the InVEST output for the Carbon storage and sequestration module?

6

Hi @danesh -

The InVEST Carbon model is extremely simple, it’s not so much of a model as a tabular accounting, just summing up the values you provide, so there’s not much to interpret.

The InVEST User Guide chapter for Carbon Storage describes the model and its limitations.

You can look for publications that include this model by looking through NatCap’s Zotero library as well as community publications, linked to from our Publications web page.

~ Stacie