Flood disaster caused by torrential rain is a common natural disaster.
The flood disaster caused by
A rainstorm is a common natural disaster. Once the flood occurs, the harm it brings to the ancient city is quite serious. Coupled with the agricultural society in ancient China, the number of big cities itself is small. Once the big city was destroyed by the flood, the flood disaster would bring great and unimaginable harm to the economy and ruling order of the ancient empire. Therefore, cities in ancient China attached great importance to flood control and drainage in site selection and construction.
1. Choose to build a city on higher ground.
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2. In ancient times, cities were built in areas where the riverbed was relatively stable.
3. roomnbsp. In many cities in southern China, some cities choose to build on the convex surface of the river basin to reduce the impact on the city.