Many thanks to the incredibly helpful developers and GIS experts who provide support on these fora…
I have recently completed some of the tutorials for InVEST SDR in both the first module and the data acquisition and processing section in the latter section. The modules allow us to get an understanding of what the input data might look like. I am now in the process of trying to work out how best to generate these data inputs for my own case study area.
The guidelines here are fairly comprehensive too: SDR: Sediment Delivery Ratio — InVEST documentation
I have highlighted the remaining gaps in my knowledge for the SDR model here in yellow:
The first gap is erosivity. I aim to download the rainfall data from one of the recommended datasets:
https://esdac.jrc.ec.europa.eu/content/global-rainfall-erosivity#tabs-0-description=1 2. https://esdac.jrc.ec.europa.eu/content/global-rainfall-erosivity#tabs-0-description=1&tabs-0-description-2=
I am not sure about the best way to convert this result into erosivity - is this done through a geoprocessing / calculator in QGIS / ArcGIS ? OR through an excel formula?
Do I need to do something similar for erodibility?
For the watersheds vector, do I need to generate this from DelineatIt or from hydrological geoprocessing toolboxes in GIS?
Is the biophysical table also generated as the attribute table of the watersheds vector through the same process?
Is drainage also generated through the DelineateIt or from hydrological geoprocessing toolboxes in GIS?
Thank you for your time and support.