QUESTION 1 Why have the Nile floodplain soils become salinized? o a wind strips

Question

QUESTION 1 Why have the Nile floodplain soils become salinized? o a wind strips away the non-saline portion of the soil o b the Nile flows north, which screws everything up ? ?.dam prevents yearly Salt-flushing floods o d annual flooding dumps salt on the floodplain O e.Intense irrigation has lowered the water table QUESTION 2 Why does the tower at Pisa, Italy lean? o a differental setting o b permafrost O c swelling sols o e caliche QUESTION 3 Which statement is untrue about loess? o a Loess is a fine-grained wind deposit o b. Loess is highly resistant to shaking C Loess is a loose but very cohesive soil od.Loess is easily excavated into tunnels QUESTION 4 In the Arctic, what is the top of a permanently frozen layer called? a permatfrost table b active layer c laterite d permafrost e talik

Explanation / Answer

1) Intense irrigation has lowered the water table which allows seawater floods or seeps into crop lands. This occurs when falling water tables allow sea water to seep inland under ground, or where aquifer subsidence causes land to settle.

2) Swelling soils as that foundation was built on a dense clay mixture of soil that, as it turned out, couldn't support and hold the weight of the tower.

3) Leoss is a loose but very cohesive soil. Statement is false because Loess is a kind of soil deposit with weak cohesion and porous microstructure.

4) The top od permanently rozen layer is called permafrost table.

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