Anyị hydrodynamic akpaka idei mmiri mgbochi kwesịrị ekwesị maka obodo mepere emepe n'okpuruala ohere (gụnyere n'okpuruala-ewu, n'okpuruala ebe ndọba ụgbọala, ụzọ ụgbọ oloko, n'okpuruala ịzụ ahịa nnukwu ụlọ ahịa, n'okporo ámá ụzọ na n'okpuruala ọkpọkọ gallery, wdg) na ọnụ ụzọ na ụzọ ọpụpụ nke ala-edina ụlọ ma ọ bụ ebe n'elu ala, na ọnụ ụzọ na ụzọ ọpụpụ nke substations na nkesa ụlọ, nke nwere ike n'ụzọ dị irè na-ezere n'okpuruala ịbụ engineering backfilling n'ihi mmiri ozuzo.
