>>105455342
Don't be a goose. Water engineering is an extremely difficult field. People think they understand water flow and things like sediment buildup and through ways etc, but they don't. Just like how the regular person doesn't really understand how electricity travels through a wire (they don't understand the spring analogy) regular people don't understand how water affects (and is affected by) everything around it. Ask Joe Smoe what the water table is and see what he says. Water flow under major construction like this is something that can literally just happen. Underground rivers that weren't charted because the construction started before modern methods existed to do so are a problem even in the US. We also have a real problem with 100 year old pipes leaking and taking the soil away with them. There's also a real problem with old prospecting leaving uncharted tunnels that have filled with water. You've got these huge pools of water eroding all the soil from under what is now modern housing and causing disasters to the point that in some states it is required by law to have sinkhole insurance on your home/land.