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Q: What is Earthern walls dams and pumps to hold back sea?
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What are earthen walls dams and pumps to hold back the sea?

polders


Walls the hold back rivers to form lakes?

Dams.


What are walls built to keep out water?

Walls to keep out water are called dams and levees.


The dutch built earthen walls to reclaim land from sea such walls were called?

These walls are called dykes or dams. (dijken in Dutch)


What do you call Building dams channels and walls to bring water to crops?

Irrigation.


How can dams control floods?

Dams hold back water up to the level that they were designed for. They control/regulate the flow of water. Flood waters that come down rivers can be held back (up to the design point) from devastating places further down river. Coastal/sea flooding would not be stopped by dams - but sea walls and the like. Still, preventing river flood waters adding to coastal flooding might help the situation.


What were ancient dams used for?

The same thing modern dams are used for. To hold back water.


How do dams save water?

Dams hold back water up to the level that they were designed for. They control/regulate the flow of water. Flood waters that come down rivers can be held back (up to the design point) from devastating places further down river. Coastal/sea flooding would not be stopped by dams - but sea walls and the like. Still, preventing river flood waters adding to coastal flooding might help the situation.


What are the uses of dams?

To hold back water


What are two ways to help reduce the dangers of floods?

by building dams


What are the actions that had been taken for bullying?

A complex network of dikes, pumps, dams, and canals has been built. sudy island wha love k (;


What holds back water for storage?

Earth or concrete/steel dams.