The diagrams illustrate flooding problems in a UK town and two possible solutions. Looking from an overall perspective, the risk comes from two main sources: the river, which can overflow during heavy rain, and the drainage system, which cannot cope with excess water. As a result, large areas around the town are often flooded.
One proposed solution is the construction of a bypass channel. When water levels rise, a gate would divert part of the river flow around the town and rejoin it downstream. This would significantly reduce pressure on the riverbanks. Although this method is highly effective, it would be costly and require considerable construction work.
The second option is to build flood walls along the riverbanks. These walls would keep water within the channel, while improved drainage would remove rainwater from the town. This approach is cheaper but requires maintenance and may not fully prevent flooding during extreme conditions.