If your tank ball or floater is not installed correctly, it could cause the flush valve to stay open. Unfortunately, this problem is not always easy to locate. There is rarely any sound associated with this type of toilet leak as it is an internal problem.
Caption Floodwaters pour over Texas dam. Water is seen flowing over the top of a dam at Padera Lake near Midlothian early Wednesday morning following days of heavy rain. Water is seen flowing over the top of a dam at Padera Lake near Midlothian early Wednesday morning following days of heavy rain.
If high discharge in the river leads to a river stage that is higher than any point on a levee, the water will overtop the levee and start to flow onto the floodplain. Because the initial gradient from the river to flood plain is relatively high, the velocity of the stream as it overtops the levee will be high.