Sistemụ mmiri mmiri nke etiti:a makwaara dịka igwe ịgba mmiri gburugburu, igwe ịgba mmiri gburugburu elekere, igwe ịgba mmiri etiti, okirikiri ịgba mmiri, wdg.
Ọ bụ nnukwu ihe mkpuchi mmiri nke na-akwado paịpụ ahụ nwere isi ihe mkpuchi mmiri n'elu ihe nkwado ahụ nke nwere ike ịga ije na akpaghị aka ma na-agbagharị gburugburu ebe etiti site na sistemụ mmiri mgbe ọ na-agba mmiri.