I have simulated a groundwater model on an integrated numerical model software (Mike She) and calibrated it.

My next step is to weigh the effect of each parameter used in the model by simply varying the parameters and running the model again then extracting the results file which in this situation is the spring discharge.

Any ideas of how to measure the weight of the varied parameters all together and how to assign a unified weight factor for each parameter on a certain scale.

Thank you