Modelling of microplastic pollution caused by laundry with a system approach

In my thesis where I used the dynamic system approach; Is it natural that there is such a small difference in results in the historical behavioral test of the population in my project area?

This may seem trivial but models are abstractions from reality.
They can never match the numbers exactly.

Getting close is valuable, getting a trend correct is more valuable that matching a single point estimate.
Keep asking questions,