One thing we come to know, THAT every country in this world need to measure about the natural disaster. like Japan need to measure earthquakes, turkey need also earthquakes and so many others.likely in USA, IN JULY ON 2025, there is a Hugh disaster about flooding in Texas. More then 160 peoples dead and more then 100 missing. The real cause of that the hugh amount of rainfall happened in there.On the river GUADALUPE river the water raise about 20-30 feet above drowned all the area surroundings causing hugh losses of life and live stocks.
Only protects of these kinds of sudden disaster from over rainfall is to dredging the river. on the point of view i can say that we have first draw a line of flow of the river that should be actual path not to cause over flood. next point to point locate the dredge point and to deep according to the path. while on the way any obstacle like bridge found the next flow of water more deep next to bridge point.
If we see the flow count of the flood water we see the bridge is one obstacle and more flood depleted there.
Another if we go count and research on the river erosion last 10 years of the Guadalupe river , we will find the real depth of river.
So, we need more research on river erosion and average depth of river and flow continuity of all the danger river that cause natural disaster on USA.