Ihe mgbochi iju mmiri anyị bụ ihe ọhụrụ na-achịkwa idei mmiri, usoro nke na-ejigide mmiri naanị na ụkpụrụ mmiri na-ebu mmiri iji nweta mmeghe na mmechi akpaka, nke nwere ike ịnagide mmiri ozuzo mberede na ọnọdụ idei mmiri, iji nweta awa 24 nke ọgụgụ isi nchịkwa. Ya mere, anyị kpọrọ ya "hydrodynamic Automatic iju mmiri ọnụ ụzọ", dị iche na Hydraulic Flip Up Flood Barrier ma ọ bụ Electric iju mmiri ọnụ ụzọ.
