wˈɔːɾɚ sˈoːɹsᵻz sˈʌtʃ ɐz ɐ ɹˈɪvɚ mˈaʊθ ɔːɹ sˈuːɚ dɹˈeɪn kæn kɹiːˈeɪt wˈɛl dᵻfˈaɪnd sˈændbɑːɹz ˈæftɚɹ ɐ bˈɪɡ aʊtflˈoʊ ʌv wˈɔːɾɚ.
Water sources such as a river mouth or sewer drain can create well defined sandbars after a big outflow of water.