Effluent of contaminated water containing $C{d}^{2+}$ penetrated a groundwater system. The average density of the ground is $2\mathrm{.}6\frac{g}{c}{m}^3,$ the porosity is $30\%$ and the groundwater flow rate is $200\frac{m}{y}.$ For this system, the distribution coefficient of $Cd$ between the groundwater and ground $(Kd)=2\mathrm{.}5c\frac{m^3}{g}.$ Calculate the distance the $C{d}^{2+}$ ions will travel in a year and to what extent will it affect the surrounding communities? $(10$A