When rivers hit larger bodies of water (such a lake or the sea), the flow slows down considerably and many of the heavier particles drop down and sink to the bottom.
Musi mulambo u tshi swika fhethu hune havha huhulwane kha maḓi (sa isha kana lwanzhe), u tshimbila nga zwiṱuku, nahone zwithu zwinzhi zwine zwo vha zwo hula zwi ya thoma u kwashea zwa mbo ḓi ya nṱha ha maḓi.