We analyze a possibility to reduce an impact of pollution emission in water bodies on its quality exponent by an appropriate redistribution of pollution density. Mathematically we consider a one dimensional model with advection, diffusion and reaction term and show that in the licensed area for a given ecological constraints there exists a pollution distribution providing the maximum total loan. Analogously for a given total loan there exists a pollution distribution in the licensed area with minimum impact on the studied
water quality exponent.
This study is continuation of the work (1)

(1) Brigolin D., Davydov.A.A., Pastres R., Petrenko I. Optimization of shellfish production carrying capacity at a farmScale, Applied Mathematics and Computation, Volume 204, Issue 2,15 October 2008, Pages 532-540.