The diagrams below show how houses can be protected in areas which are prone to flooding. Write a report for a university, lecturer describing the information shown below.

The diagram illustrates how buildings in flooding-prone areas can be safeguarded. Overall, the picture shows two methods in which a house can be protected; one is building a stopbank on the riverbank and the other is raising the height of the building above the flood level. First, in one with a stopbank, The stopbank is built along the riverside over the berm. The 100-year flood level is the mark of maximum flood level, from that mark to the height of the stopbank is freeboard. At the bottom of the stopbank, there is a floodgate that sends water back into the river due to internal ponding by the internal runoff of water during rain. In contrast, the second method is without the stopbank in which the buildings are raised from the ground floor of a certain height. The ponding level and the house floor level is the freeboard must be at least 300mm to prevent flooding into the house. So the building must be raised by the height of the freeboard from the ponding level or flooding level. To summarize, the one with a stopbank and without a stopbank can be effective when the area is prone to flooding, and both are suitable for the riverside buildings.