Ingasetshenziswa ukwenza into yokushisa kagesi ku-applatus ephansi yamandla aphansi, njengokudluliswa okuphezulu kwe-armal edluliselwe, futhi ngakho-ke ku-arch exchanger noma izitshalo zamanzi ezishisayo, izindawo zokupholisa zomoya ezisetshenziswayo zamanzi asolwandle, kanye namapayipi amanzi olwandle emikhunjini.