Itshe lokugudla lemvelo noma elenziwe elisetshenziselwa ukulola nokucija amathuluzi anamaklebhu — imimese, izinsimbi zokubaza, amazembe, namaklebhu epuleni. Amatshe emvelo (i-Arkansas, amatshe amanzi aseJapane, amatshe okulola aseNorway) anezinhlamvu ezehlukene. Asetshenziswa namanzi noma amafutha njengesithambisi ukuze kususwe izinhlayiya zensimbi kuvinjelwe nokuthi ubuso bube shelelezi buvaleke.