20/10/2024
Happening in Honolulu right now too
Aquifers do an important job
But due to removing wet lands and marshlands and vegetation that absorb the rain. Have removed the ability of the underground drainage river what replaced it was residential towers and large concrete 
If we exclude atmospheric rivers and climate change as factors, the primary causes for increased rain-related flooding over the last five years compared to the previous decade can largely be attributed to urbanization and changes in land use. Key factors include:
1. Increased Urban Development all over the world
The stretch from Vancouver to Abbotsford has seen significant residential, commercial, and industrial development. This expansion often results in more impervious surfaces like roads, parking lots, and buildings. These surfaces prevent rainwater from being absorbed into the ground, increasing surface runoff, which overwhelms drainage systems.
2. Loss of Natural Absorption Areas: Development often leads to the destruction of natural wetlands, forests, and green spaces that previously absorbed and slowed the flow of rainwater. Without these natural buffers, rainwater flows more quickly into rivers, creeks, and urban drainage systems, leading to more frequent and severe flooding.
3. Overburdened Drainage Systems: As urban areas grow, drainage infrastructure sometimes fails to keep pace. Storm drains, sewers, and d***s that were designed to handle lower volumes of runoff may not have been adequately upgraded to meet the demands of intensified development, leading to flooding during heavy rainfall
4. Building in Flood-Prone Areas: Rapid development sometimes pushes construction into areas that are more susceptible to flooding, such as floodplains or regions with poor natural drainage. As development encroaches on these areas, the risk of flooding during rain events increases.
5. Poor Stormwater Management Practices: In some cases, inadequate planning for stormwater management in new developments can exacerbate flooding. This could include improper grading, insufficient stormwater retention ponds, or undersized drainage infrastructure.
In essence, the increased flooding from rain is linked to the pace of development outstripping the capacity of natural and built systems to manage excess water effectively. This has amplified the flooding issues in areas that previously may not have experienced such problems.
