The study looked at how different breach properties affect the flow of water. They used a model of flow over a weir in a lab experiment with different breach sizes. They found that the amount of water flowing through the breach was different depending on the conditions. They also found that a certain formula could predict how much water would flow over the weir. In cases where the weir was not perfect, they introduced a new factor to account for it. They also discussed how the energy loss from the weir depended on the amount of water and the depth downstream. They described the flow patterns and velocity of water behind the weir. Finally, they tested a computer model to see if it matched their experimental results. This information can help with designing models for floods and weirs.