Yedu yekuvharira mafashama chigadzirwa chekugadzirisa mafashama, nzira yekuchengeta mvura chete ine mvura buoyancy musimboti kuwana otomatiki kuvhura nekuvhara, iyo inogona kutarisana nekungoerekana mvura inonaya uye mafashama mamiriro, kuwana 24 maawa ehungwaru kutonga mafashama. Saka takaidaidza kuti "hydrodynamic Automatic flood gate", yakasiyana neHydraulic Flip Up Flood Barrier kana Electric flood gate.
