Hello everyone,
I recently came across the Colombian study “Assessing the Effectiveness of the Use of the InVEST Annual Water Yield Model for the Rivers of Colombia: A Case Study of the Meta River Basin” (https://doi.org/10.3390/w15081617). The authors state that the InVEST-AWY model can be calibrated using outputs from the SWAT (Soil and Water Assessment Tool) model.
I would like to ask the community if this same approach—calibrating or using SWAT outputs as a “proxy” —is methodologically sound for the Nutrient Delivery Ratio (NDR) and Sediment Delivery Ratio (SDR) models. I have seen some studies where SWAT runoff estimates are used as the Nutrient Runoff Proxy in NDR to increase accuracy in regions with limited weather station data.
Are there any recommended protocols for performing this “soft calibration” between SWAT and InVEST for sediments and nutrients while maintaining model integrity?