Kuva mu ntangiriro z'ikinyejana cya 21, inzira yo gutunganya imijyi yihuse cyane, abaturage bo mu mijyi bakomeje kwiyongera, kandi icyifuzo cy'amazu cyiyongereye cyane, ibyo bikaba byazamuye izamuka ry'ibiciro by'amazu.Byongeye kandi, iterambere ridasanzwe ryimitungo itimukanwa ryanatumye ibiciro byamazu bikomeza kuzamuka, birenze ubushobozi bwabaturage basanzwe.Kugaragara kw'amazu ya kontineri byateje imbere kubaka amazu mu cyerekezo cy'inganda, bigatuma amazu yubakwa ahendutse, azigama ingufu, agirira akamaro ibidukikije, kandi ateza imbere iterambere ry’amazu y’inganda.

Mu myaka yashize, igitekerezo cyamazu ya "kontineri" cyarahinduwe rwose, bituma habaho inzira yumwuga yo guhindura ibintu, kugena ibipimo ngenderwaho, no gutanga umurongo munini wo guteranya imirongo.Ugereranije nubwubatsi gakondo, kubaka kontineri bifite ibisabwa bito kandi bigezweho kandi bigahinduka.Irashobora guhindurwa ukurikije ibikenewe byihariye.Umwanya wihariye wo gushushanya uroroshye guhinduka.Uruganda rwibanze rugabanya cyane igihe cyo kubaka.Igishushanyo cyimukanwa ni intambwe mu nyubako gakondo, kandi haribishoboka bitarondoreka mugihe kizaza.

Iterambere ryihuse ryubwubatsi bwimijyi no gutera imbere gahoro gahoro imijyi byinjije societe mugihe cyiterambere ryihuse.Hamwe niterambere ryiterambere ryinganda zubwubatsi, ibibazo by ibidukikije biterwa nubwubatsi nabyo byakuruye umuryango.Mu bihe bikomeye byo guhindura no kuzamura imiterere y’inganda z’imibereho, gahunda nshya y’inyubako yujuje ibyangombwa bisabwa mu iterambere ry’igihugu rirambye byabaye impungenge mu nganda z’ubwubatsi, kandi kuvuka kwamazu ya kontineri byabaye ingamba zingenzi zo guteza imbere u iterambere rirambye ryinganda zubaka.