Mphamvu ya hydrodynamic yokha yosungiramo madzi imapangidwa ndi magawo atatu: maziko a chimanga, khoma la khoma lokhazikika, lomwe limatha kuyikidwa mwachangu pakhomo ndikutuluka m'nyumba zogona pansi. Ma module oyandikana nawo ali osungunuka, ndipo mbale zosinthika zosinthika mbali zonse ziwiri ndikulumikiza gulu la madzi osefukira ndi khoma.
