Hello all,
I am trying to calibrate SWAT 2012 for the Total Phosphorus load. I have the problem with very large simulated TP load, around a hundred times higher than the observed one. I calibrated SWAT for flow and surface runoff seems reasonable. I also checked sediments loads. I can not calibrate it because of lack of data, but I found in the literature yearly loads for sediment and adjust my model to them.
Now I am clueless. I would be grateful for any suggestions on which parameters or processes should I pay my attention in terms of phosphorus simulation.