Living with nature
You explains that the lowest land, the regularly submerged zones, will be turned into large manmade lakes that can serve as reservoirs during flooding. The variable containment zones are broadly defined as being submerged, with the depths of their waters varying with rainfall. These are typically adjacent to regularly submerged zones and will remain in a state similar to wetland parks. Seen in a cutaway view, it looks like a large bowl with a smaller one-the manmade lake-placed inside of it. This way, when water floods over, the amassed water is naturally cleansed as it passes through the wetlands. It becomes groundwater usable for agriculture and aquaculture. This zone also will include a newly developed "ecological aquaculture" area, in which low-lying fisheries will be turned into aquaculture facilities that would not be harmed by flooding, such as ones raising clams or aquatic plants.
The third category, flood buffer zones, are areas that, years after having groundwater pumped out, are still slowly sinking. There is still less chance of flooding than in the second category, but it can happen in heavy rains. This category of land will be used as community parks and leisure space. It can also be used for agriculture and aquaculture businesses that are able to function even with the water there. The fourth category, the living zones, are for residences, roads, institutional and educational facilities, and the like. They also accommodate high-end aquaculture and agriculture businesses.
In order to avoid pumping groundwater, amassed floodwater will be used for aquaculture. The amount of surface area used for aquaculture is determined by the greatest amount of water that is accumulated, so that resources are used according to the capacity of the environment.
To zone the area in this way, public lands-originally 22% of the area-would have to make up 32%, or 100 hectares, of it in order to accommodate the manmade lakes, the runoff wetlands, and the public facilities. That means that some fisheries have to scale back their sizes and some residents have to give up land. On the other hand, the rezoning will feature newly zoned and reclaimed business and residential districts that should raise property values. The government will exchange such lands for residents' lands or provide compensation in order to preserve residents' existing legal rights.
"Even where residents have to move, their lives won't actually change much. That's why there isn't much resistance," says You. As for areas where private businesses are to be turned into low-risk aquaculture zones or returned to a natural state, in the future they might be suitable for new leisure or environmental education industries. Many residents are very accepting, but of course there are some who are worried or are unwilling to change and still need to see successful cases to put their faith in.
Flood models: 2004 vs. 2032